Added ocl::pyrDown to T-API

modules/imgproc/src/opencl/pyr_down.cl

+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  By downloading, copying, installing or using the software you agree to this license.
+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                           License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2010-2012, Multicoreware, Inc., all rights reserved.
+// Copyright (C) 2010-2012, Advanced Micro Devices, Inc., all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// @Authors
+//    Dachuan Zhao, dachuan@multicorewareinc.com
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//   * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//   * The name of the copyright holders may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors as is and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+#if cn == 4
+#define FT float4
+#else
+#define FT float
+#endif
+
+#define noconvert
+
+inline int idx_row_low(int y, int last_row)
+{
+    return abs(y) % (last_row + 1);
+}
+
+inline int idx_row_high(int y, int last_row)
+{
+    return abs(last_row - (int)abs(last_row - y)) % (last_row + 1);
+}
+
+inline int idx_row(int y, int last_row)
+{
+    return idx_row_low(idx_row_high(y, last_row), last_row);
+}
+
+inline int idx_col_low(int x, int last_col)
+{
+    return abs(x) % (last_col + 1);
+}
+
+inline int idx_col_high(int x, int last_col)
+{
+    return abs(last_col - (int)abs(last_col - x)) % (last_col + 1);
+}
+
+inline int idx_col(int x, int last_col)
+{
+    return idx_col_low(idx_col_high(x, last_col), last_col);
+}
+
+__kernel void pyrDown(__global const uchar * srcData, int src_step, int src_offset, int src_rows, int src_cols,
+                         __global uchar * dst, int dst_step, int dst_offset, int dst_rows, int dst_cols)
+{
+    const int x = get_global_id(0);
+    const int y = get_group_id(1);
+
+    __local FT smem[256 + 4];
+
+    FT sum;
+
+    FT co1 = 0.375f;
+    FT co2 = 0.25f;
+    FT co3 = 0.0625f;
+
+    const int src_y = 2*y;
+    const int last_row = srcRows - 1;
+    const int last_col = srcCols - 1;
+
+    if (src_y >= 2 && src_y < srcRows - 2 && x >= 2 && x < srcCols - 2)
+    {
+        sum =       co3 * convertToFT(((__global T*)(srcData + (src_y - 2) * srcStep / cn))[x]);
+        sum = sum + co2 * convertToFT(((__global T*)(srcData + (src_y - 1) * srcStep / cn))[x]);
+        sum = sum + co1 * convertToFT(((__global T*)(srcData + (src_y    ) * srcStep / cn))[x]);
+        sum = sum + co2 * convertToFT(((__global T*)(srcData + (src_y + 1) * srcStep / cn))[x]);
+        sum = sum + co3 * convertToFT(((__global T*)(srcData + (src_y + 2) * srcStep / cn))[x]);
+
+        smem[2 + get_local_id(0)] = sum;
+
+        if (get_local_id(0) < 2)
+        {
+            const int left_x = x - 2;
+
+            sum =       co3 * convertToFT(((__global T*)(srcData + (src_y - 2) * srcStep / cn))[left_x]);
+            sum = sum + co2 * convertToFT(((__global T*)(srcData + (src_y - 1) * srcStep / cn))[left_x]);
+            sum = sum + co1 * convertToFT(((__global T*)(srcData + (src_y    ) * srcStep / cn))[left_x]);
+            sum = sum + co2 * convertToFT(((__global T*)(srcData + (src_y + 1) * srcStep / cn))[left_x]);
+            sum = sum + co3 * convertToFT(((__global T*)(srcData + (src_y + 2) * srcStep / cn))[left_x]);
+
+            smem[get_local_id(0)] = sum;
+        }
+
+        if (get_local_id(0) > 253)
+        {
+            const int right_x = x + 2;
+
+            sum =       co3 * convertToFT(((__global T*)(srcData + (src_y - 2) * srcStep / cn))[right_x]);
+            sum = sum + co2 * convertToFT(((__global T*)(srcData + (src_y - 1) * srcStep / cn))[right_x]);
+            sum = sum + co1 * convertToFT(((__global T*)(srcData + (src_y    ) * srcStep / cn))[right_x]);
+            sum = sum + co2 * convertToFT(((__global T*)(srcData + (src_y + 1) * srcStep / cn))[right_x]);
+            sum = sum + co3 * convertToFT(((__global T*)(srcData + (src_y + 2) * srcStep / cn))[right_x]);
+
+            smem[4 + get_local_id(0)] = sum;
+        }
+    }
+    else
+    {
+        int col = idx_col(x, last_col);
+
+        sum =       co3 * convertToFT(((__global T*)(srcData + idx_row(src_y - 2, last_row) * srcStep / cn))[col]);
+        sum = sum + co2 * convertToFT(((__global T*)(srcData + idx_row(src_y - 1, last_row) * srcStep / cn))[col]);
+        sum = sum + co1 * convertToFT(((__global T*)(srcData + idx_row(src_y    , last_row) * srcStep / cn))[col]);
+        sum = sum + co2 * convertToFT(((__global T*)(srcData + idx_row(src_y + 1, last_row) * srcStep / cn))[col]);
+        sum = sum + co3 * convertToFT(((__global T*)(srcData + idx_row(src_y + 2, last_row) * srcStep / cn))[col]);
+
+        smem[2 + get_local_id(0)] = sum;
+
+        if (get_local_id(0) < 2)
+        {
+            const int left_x = x - 2;
+
+            col = idx_col(left_x, last_col);
+
+            sum =       co3 * convertToFT(((__global T*)(srcData + idx_row(src_y - 2, last_row) * srcStep / cn))[col]);
+            sum = sum + co2 * convertToFT(((__global T*)(srcData + idx_row(src_y - 1, last_row) * srcStep / cn))[col]);
+            sum = sum + co1 * convertToFT(((__global T*)(srcData + idx_row(src_y    , last_row) * srcStep / cn))[col]);
+            sum = sum + co2 * convertToFT(((__global T*)(srcData + idx_row(src_y + 1, last_row) * srcStep / cn))[col]);
+            sum = sum + co3 * convertToFT(((__global T*)(srcData + idx_row(src_y + 2, last_row) * srcStep / cn))[col]);
+
+            smem[get_local_id(0)] = sum;
+        }
+
+        if (get_local_id(0) > 253)
+        {
+            const int right_x = x + 2;
+
+            col = idx_col(right_x, last_col);
+
+            sum =       co3 * convertToFT(((__global T*)(srcData + idx_row(src_y - 2, last_row) * srcStep / cn))[col]);
+            sum = sum + co2 * convertToFT(((__global T*)(srcData + idx_row(src_y - 1, last_row) * srcStep / cn))[col]);
+            sum = sum + co1 * convertToFT(((__global T*)(srcData + idx_row(src_y    , last_row) * srcStep / cn))[col]);
+            sum = sum + co2 * convertToFT(((__global T*)(srcData + idx_row(src_y + 1, last_row) * srcStep / cn))[col]);
+            sum = sum + co3 * convertToFT(((__global T*)(srcData + idx_row(src_y + 2, last_row) * srcStep / cn))[col]);
+
+            smem[4 + get_local_id(0)] = sum;
+        }
+    }
+
+    barrier(CLK_LOCAL_MEM_FENCE);
+
+    if (get_local_id(0) < 128)
+    {
+        const int tid2 = get_local_id(0) * 2;
+
+        sum =       co3 * smem[2 + tid2 - 2];
+        sum = sum + co2 * smem[2 + tid2 - 1];
+        sum = sum + co1 * smem[2 + tid2    ];
+        sum = sum + co2 * smem[2 + tid2 + 1];
+        sum = sum + co3 * smem[2 + tid2 + 2];
+
+        const int dst_x = (get_group_id(0) * get_local_size(0) + tid2) / 2;
+
+        if (dst_x < dstCols)
+            dst[y * dstStep + dst_x] = convertToT(sum);
+    }
+
+}
+
+///////////////////////////////////////////////////////////////////////
+//////////////////////////  CV_8UC1 ///////////////////////////////////
+///////////////////////////////////////////////////////////////////////
+
+__kernel void pyrDown_C1_D0(__global uchar * srcData, int srcStep, int srcRows, int srcCols, __global uchar *dst, int dstStep, int dstCols)
+{
+    const int x = get_global_id(0);
+    const int y = get_group_id(1);
+
+    __local float smem[256 + 4];
+
+    float sum;
+
+    const int src_y = 2*y;
+    const int last_row = srcRows - 1;
+    const int last_col = srcCols - 1;
+
+    if (src_y >= 2 && src_y < srcRows - 2 && x >= 2 && x < srcCols - 2)
+    {
+        sum =       0.0625f * (((srcData + (src_y - 2) * srcStep))[x]);
+        sum = sum + 0.25f   * (((srcData + (src_y - 1) * srcStep))[x]);
+        sum = sum + 0.375f  * (((srcData + (src_y    ) * srcStep))[x]);
+        sum = sum + 0.25f   * (((srcData + (src_y + 1) * srcStep))[x]);
+        sum = sum + 0.0625f * (((srcData + (src_y + 2) * srcStep))[x]);
+
+        smem[2 + get_local_id(0)] = sum;
+
+        if (get_local_id(0) < 2)
+        {
+            const int left_x = x - 2;
+
+            sum =       0.0625f * (((srcData + (src_y - 2) * srcStep))[left_x]);
+            sum = sum + 0.25f   * (((srcData + (src_y - 1) * srcStep))[left_x]);
+            sum = sum + 0.375f  * (((srcData + (src_y    ) * srcStep))[left_x]);
+            sum = sum + 0.25f   * (((srcData + (src_y + 1) * srcStep))[left_x]);
+            sum = sum + 0.0625f * (((srcData + (src_y + 2) * srcStep))[left_x]);
+
+            smem[get_local_id(0)] = sum;
+        }
+
+        if (get_local_id(0) > 253)
+        {
+            const int right_x = x + 2;
+
+            sum =       0.0625f * (((srcData + (src_y - 2) * srcStep))[right_x]);
+            sum = sum + 0.25f   * (((srcData + (src_y - 1) * srcStep))[right_x]);
+            sum = sum + 0.375f  * (((srcData + (src_y    ) * srcStep))[right_x]);
+            sum = sum + 0.25f   * (((srcData + (src_y + 1) * srcStep))[right_x]);
+            sum = sum + 0.0625f * (((srcData + (src_y + 2) * srcStep))[right_x]);
+
+            smem[4 + get_local_id(0)] = sum;
+        }
+    }
+    else
+    {
+        int col = idx_col(x, last_col);
+
+        sum =       0.0625f * (((srcData + idx_row(src_y - 2, last_row) * srcStep))[col]);
+        sum = sum + 0.25f   * (((srcData + idx_row(src_y - 1, last_row) * srcStep))[col]);
+        sum = sum + 0.375f  * (((srcData + idx_row(src_y    , last_row) * srcStep))[col]);
+        sum = sum + 0.25f   * (((srcData + idx_row(src_y + 1, last_row) * srcStep))[col]);
+        sum = sum + 0.0625f * (((srcData + idx_row(src_y + 2, last_row) * srcStep))[col]);
+
+        smem[2 + get_local_id(0)] = sum;
+
+        if (get_local_id(0) < 2)
+        {
+            const int left_x = x - 2;
+
+            col = idx_col(left_x, last_col);
+
+            sum =       0.0625f * (((srcData + idx_row(src_y - 2, last_row) * srcStep))[col]);
+            sum = sum + 0.25f   * (((srcData + idx_row(src_y - 1, last_row) * srcStep))[col]);
+            sum = sum + 0.375f  * (((srcData + idx_row(src_y    , last_row) * srcStep))[col]);
+            sum = sum + 0.25f   * (((srcData + idx_row(src_y + 1, last_row) * srcStep))[col]);
+            sum = sum + 0.0625f * (((srcData + idx_row(src_y + 2, last_row) * srcStep))[col]);
+
+            smem[get_local_id(0)] = sum;
+        }
+
+        if (get_local_id(0) > 253)
+        {
+            const int right_x = x + 2;
+
+            col = idx_col(right_x, last_col);
+
+            sum =       0.0625f * (((srcData + idx_row(src_y - 2, last_row) * srcStep))[col]);
+            sum = sum + 0.25f   * (((srcData + idx_row(src_y - 1, last_row) * srcStep))[col]);
+            sum = sum + 0.375f  * (((srcData + idx_row(src_y    , last_row) * srcStep))[col]);
+            sum = sum + 0.25f   * (((srcData + idx_row(src_y + 1, last_row) * srcStep))[col]);
+            sum = sum + 0.0625f * (((srcData + idx_row(src_y + 2, last_row) * srcStep))[col]);
+
+            smem[4 + get_local_id(0)] = sum;
+        }
+    }
+
+    barrier(CLK_LOCAL_MEM_FENCE);
+
+    if (get_local_id(0) < 128)
+    {
+        const int tid2 = get_local_id(0) * 2;
+
+        sum =       0.0625f * smem[2 + tid2 - 2];
+        sum = sum + 0.25f   * smem[2 + tid2 - 1];
+        sum = sum + 0.375f  * smem[2 + tid2    ];
+        sum = sum + 0.25f   * smem[2 + tid2 + 1];
+        sum = sum + 0.0625f * smem[2 + tid2 + 2];
+
+        const int dst_x = (get_group_id(0) * get_local_size(0) + tid2) / 2;
+
+        if (dst_x < dstCols)
+            dst[y * dstStep + dst_x] = convert_uchar_sat_rte(sum);
+    }
+}
+
+///////////////////////////////////////////////////////////////////////
+//////////////////////////  CV_8UC4 ///////////////////////////////////
+///////////////////////////////////////////////////////////////////////
+
+__kernel void pyrDown_C4_D0(__global uchar4 * srcData, int srcStep, int srcRows, int srcCols, __global uchar4 *dst, int dstStep, int dstCols)
+{
+    const int x = get_global_id(0);
+    const int y = get_group_id(1);
+
+    __local float4 smem[256 + 4];
+
+    float4 sum;
+
+    const int src_y = 2*y;
+    const int last_row = srcRows - 1;
+    const int last_col = srcCols - 1;
+
+    float4 co1 = 0.375f;
+    float4 co2 = 0.25f;
+    float4 co3 = 0.0625f;
+
+    if (src_y >= 2 && src_y < srcRows - 2 && x >= 2 && x < srcCols - 2)
+    {
+        sum =       co3 * convert_float4((((srcData + (src_y - 2) * srcStep / 4))[x]));
+        sum = sum + co2 * convert_float4((((srcData + (src_y - 1) * srcStep / 4))[x]));
+        sum = sum + co1 * convert_float4((((srcData + (src_y    ) * srcStep / 4))[x]));
+        sum = sum + co2 * convert_float4((((srcData + (src_y + 1) * srcStep / 4))[x]));
+        sum = sum + co3 * convert_float4((((srcData + (src_y + 2) * srcStep / 4))[x]));
+
+        smem[2 + get_local_id(0)] = sum;
+
+        if (get_local_id(0) < 2)
+        {
+            const int left_x = x - 2;
+
+            sum =       co3 * convert_float4((((srcData + (src_y - 2) * srcStep / 4))[left_x]));
+            sum = sum + co2 * convert_float4((((srcData + (src_y - 1) * srcStep / 4))[left_x]));
+            sum = sum + co1 * convert_float4((((srcData + (src_y    ) * srcStep / 4))[left_x]));
+            sum = sum + co2 * convert_float4((((srcData + (src_y + 1) * srcStep / 4))[left_x]));
+            sum = sum + co3 * convert_float4((((srcData + (src_y + 2) * srcStep / 4))[left_x]));
+
+            smem[get_local_id(0)] = sum;
+        }
+
+        if (get_local_id(0) > 253)
+        {
+            const int right_x = x + 2;
+
+            sum =       co3 * convert_float4((((srcData + (src_y - 2) * srcStep / 4))[right_x]));
+            sum = sum + co2 * convert_float4((((srcData + (src_y - 1) * srcStep / 4))[right_x]));
+            sum = sum + co1 * convert_float4((((srcData + (src_y    ) * srcStep / 4))[right_x]));
+            sum = sum + co2 * convert_float4((((srcData + (src_y + 1) * srcStep / 4))[right_x]));
+            sum = sum + co3 * convert_float4((((srcData + (src_y + 2) * srcStep / 4))[right_x]));
+
+            smem[4 + get_local_id(0)] = sum;
+        }
+    }
+    else
+    {
+        int col = idx_col(x, last_col);
+
+        sum =       co3 * convert_float4((((srcData + idx_row(src_y - 2, last_row) * srcStep / 4))[col]));
+        sum = sum + co2 * convert_float4((((srcData + idx_row(src_y - 1, last_row) * srcStep / 4))[col]));
+        sum = sum + co1 * convert_float4((((srcData + idx_row(src_y    , last_row) * srcStep / 4))[col]));
+        sum = sum + co2 * convert_float4((((srcData + idx_row(src_y + 1, last_row) * srcStep / 4))[col]));
+        sum = sum + co3 * convert_float4((((srcData + idx_row(src_y + 2, last_row) * srcStep / 4))[col]));
+
+        smem[2 + get_local_id(0)] = sum;
+
+        if (get_local_id(0) < 2)
+        {
+            const int left_x = x - 2;
+
+            col = idx_col(left_x, last_col);
+
+            sum =       co3 * convert_float4((((srcData + idx_row(src_y - 2, last_row) * srcStep / 4))[col]));
+            sum = sum + co2 * convert_float4((((srcData + idx_row(src_y - 1, last_row) * srcStep / 4))[col]));
+            sum = sum + co1 * convert_float4((((srcData + idx_row(src_y    , last_row) * srcStep / 4))[col]));
+            sum = sum + co2 * convert_float4((((srcData + idx_row(src_y + 1, last_row) * srcStep / 4))[col]));
+            sum = sum + co3 * convert_float4((((srcData + idx_row(src_y + 2, last_row) * srcStep / 4))[col]));
+
+            smem[get_local_id(0)] = sum;
+        }
+
+        if (get_local_id(0) > 253)
+        {
+            const int right_x = x + 2;
+
+            col = idx_col(right_x, last_col);
+
+            sum =       co3 * convert_float4((((srcData + idx_row(src_y - 2, last_row) * srcStep / 4))[col]));
+            sum = sum + co2 * convert_float4((((srcData + idx_row(src_y - 1, last_row) * srcStep / 4))[col]));
+            sum = sum + co1 * convert_float4((((srcData + idx_row(src_y    , last_row) * srcStep / 4))[col]));
+            sum = sum + co2 * convert_float4((((srcData + idx_row(src_y + 1, last_row) * srcStep / 4))[col]));
+            sum = sum + co3 * convert_float4((((srcData + idx_row(src_y + 2, last_row) * srcStep / 4))[col]));
+
+            smem[4 + get_local_id(0)] = sum;
+        }
+    }
+
+    barrier(CLK_LOCAL_MEM_FENCE);
+
+    if (get_local_id(0) < 128)
+    {
+        const int tid2 = get_local_id(0) * 2;
+
+        sum =       co3 * smem[2 + tid2 - 2];
+        sum = sum + co2 * smem[2 + tid2 - 1];
+        sum = sum + co1 * smem[2 + tid2    ];
+        sum = sum + co2 * smem[2 + tid2 + 1];
+        sum = sum + co3 * smem[2 + tid2 + 2];
+
+        const int dst_x = (get_group_id(0) * get_local_size(0) + tid2) / 2;
+
+        if (dst_x < dstCols)
+            dst[y * dstStep / 4 + dst_x] = convert_uchar4_sat_rte(sum);
+    }
+}
+
+///////////////////////////////////////////////////////////////////////
+//////////////////////////  CV_16UC1 //////////////////////////////////
+///////////////////////////////////////////////////////////////////////
+
+__kernel void pyrDown_C1_D2(__global ushort * srcData, int srcStep, int srcRows, int srcCols, __global ushort *dst, int dstStep, int dstCols)
+{
+    const int x = get_global_id(0);
+    const int y = get_group_id(1);
+
+    __local float smem[256 + 4];
+
+    float sum;
+
+    const int src_y = 2*y;
+    const int last_row = srcRows - 1;
+    const int last_col = srcCols - 1;
+
+    if (src_y >= 2 && src_y < srcRows - 2 && x >= 2 && x < srcCols - 2)
+    {
+        sum =       0.0625f * ((__global ushort*)((__global char*)srcData + (src_y - 2) * srcStep))[x];
+        sum = sum + 0.25f   * ((__global ushort*)((__global char*)srcData + (src_y - 1) * srcStep))[x];
+        sum = sum + 0.375f  * ((__global ushort*)((__global char*)srcData + (src_y    ) * srcStep))[x];
+        sum = sum + 0.25f   * ((__global ushort*)((__global char*)srcData + (src_y + 1) * srcStep))[x];
+        sum = sum + 0.0625f * ((__global ushort*)((__global char*)srcData + (src_y + 2) * srcStep))[x];
+
+        smem[2 + get_local_id(0)] = sum;
+
+        if (get_local_id(0) < 2)
+        {
+            const int left_x = x - 2;
+
+            sum =       0.0625f * ((__global ushort*)((__global char*)srcData + (src_y - 2) * srcStep))[left_x];
+            sum = sum + 0.25f   * ((__global ushort*)((__global char*)srcData + (src_y - 1) * srcStep))[left_x];
+            sum = sum + 0.375f  * ((__global ushort*)((__global char*)srcData + (src_y    ) * srcStep))[left_x];
+            sum = sum + 0.25f   * ((__global ushort*)((__global char*)srcData + (src_y + 1) * srcStep))[left_x];
+            sum = sum + 0.0625f * ((__global ushort*)((__global char*)srcData + (src_y + 2) * srcStep))[left_x];
+
+            smem[get_local_id(0)] = sum;
+        }
+
+        if (get_local_id(0) > 253)
+        {
+            const int right_x = x + 2;
+
+            sum =       0.0625f * ((__global ushort*)((__global char*)srcData + (src_y - 2) * srcStep))[right_x];
+            sum = sum + 0.25f   * ((__global ushort*)((__global char*)srcData + (src_y - 1) * srcStep))[right_x];
+            sum = sum + 0.375f  * ((__global ushort*)((__global char*)srcData + (src_y    ) * srcStep))[right_x];
+            sum = sum + 0.25f   * ((__global ushort*)((__global char*)srcData + (src_y + 1) * srcStep))[right_x];
+            sum = sum + 0.0625f * ((__global ushort*)((__global char*)srcData + (src_y + 2) * srcStep))[right_x];
+
+            smem[4 + get_local_id(0)] = sum;
+        }
+    }
+    else
+    {
+        int col = idx_col(x, last_col);
+
+        sum =       0.0625f * ((__global ushort*)((__global char*)srcData + idx_row(src_y - 2, last_row) * srcStep))[col];
+        sum = sum + 0.25f   * ((__global ushort*)((__global char*)srcData + idx_row(src_y - 1, last_row) * srcStep))[col];
+        sum = sum + 0.375f  * ((__global ushort*)((__global char*)srcData + idx_row(src_y    , last_row) * srcStep))[col];
+        sum = sum + 0.25f   * ((__global ushort*)((__global char*)srcData + idx_row(src_y + 1, last_row) * srcStep))[col];
+        sum = sum + 0.0625f * ((__global ushort*)((__global char*)srcData + idx_row(src_y + 2, last_row) * srcStep))[col];
+
+        smem[2 + get_local_id(0)] = sum;
+
+        if (get_local_id(0) < 2)
+        {
+            const int left_x = x - 2;
+
+            col = idx_col(left_x, last_col);
+
+            sum =       0.0625f * ((__global ushort*)((__global char*)srcData + idx_row(src_y - 2, last_row) * srcStep))[col];
+            sum = sum + 0.25f   * ((__global ushort*)((__global char*)srcData + idx_row(src_y - 1, last_row) * srcStep))[col];
+            sum = sum + 0.375f  * ((__global ushort*)((__global char*)srcData + idx_row(src_y    , last_row) * srcStep))[col];
+            sum = sum + 0.25f   * ((__global ushort*)((__global char*)srcData + idx_row(src_y + 1, last_row) * srcStep))[col];
+            sum = sum + 0.0625f * ((__global ushort*)((__global char*)srcData + idx_row(src_y + 2, last_row) * srcStep))[col];
+
+            smem[get_local_id(0)] = sum;
+        }
+
+        if (get_local_id(0) > 253)
+        {
+            const int right_x = x + 2;
+
+            col = idx_col(right_x, last_col);
+
+            sum =       0.0625f * ((__global ushort*)((__global char*)srcData + idx_row(src_y - 2, last_row) * srcStep))[col];
+            sum = sum + 0.25f   * ((__global ushort*)((__global char*)srcData + idx_row(src_y - 1, last_row) * srcStep))[col];
+            sum = sum + 0.375f  * ((__global ushort*)((__global char*)srcData + idx_row(src_y    , last_row) * srcStep))[col];
+            sum = sum + 0.25f   * ((__global ushort*)((__global char*)srcData + idx_row(src_y + 1, last_row) * srcStep))[col];
+            sum = sum + 0.0625f * ((__global ushort*)((__global char*)srcData + idx_row(src_y + 2, last_row) * srcStep))[col];
+
+            smem[4 + get_local_id(0)] = sum;
+        }
+    }
+
+    barrier(CLK_LOCAL_MEM_FENCE);
+
+    if (get_local_id(0) < 128)
+    {
+        const int tid2 = get_local_id(0) * 2;
+
+        sum =       0.0625f * smem[2 + tid2 - 2];
+        sum = sum + 0.25f   * smem[2 + tid2 - 1];
+        sum = sum + 0.375f  * smem[2 + tid2    ];
+        sum = sum + 0.25f   * smem[2 + tid2 + 1];
+        sum = sum + 0.0625f * smem[2 + tid2 + 2];
+
+        const int dst_x = (get_group_id(0) * get_local_size(0) + tid2) / 2;
+
+        if (dst_x < dstCols)
+            dst[y * dstStep / 2 + dst_x] = convert_ushort_sat_rte(sum);
+    }
+}
+
+///////////////////////////////////////////////////////////////////////
+//////////////////////////  CV_16UC4 //////////////////////////////////
+///////////////////////////////////////////////////////////////////////
+
+__kernel void pyrDown_C4_D2(__global ushort4 * srcData, int srcStep, int srcRows, int srcCols, __global ushort4 *dst, int dstStep, int dstCols)
+{
+    const int x = get_global_id(0);
+    const int y = get_group_id(1);
+
+    __local float4 smem[256 + 4];
+
+    float4 sum;
+
+    const int src_y = 2*y;
+    const int last_row = srcRows - 1;
+    const int last_col = srcCols - 1;
+
+    float4 co1 = 0.375f;
+    float4 co2 = 0.25f;
+    float4 co3 = 0.0625f;
+
+    if (src_y >= 2 && src_y < srcRows - 2 && x >= 2 && x < srcCols - 2)
+    {
+        sum =       co3 * convert_float4(((__global ushort4*)((__global char4*)srcData + (src_y - 2) * srcStep / 4))[x]);
+        sum = sum + co2 * convert_float4(((__global ushort4*)((__global char4*)srcData + (src_y - 1) * srcStep / 4))[x]);
+        sum = sum + co1 * convert_float4(((__global ushort4*)((__global char4*)srcData + (src_y    ) * srcStep / 4))[x]);
+        sum = sum + co2 * convert_float4(((__global ushort4*)((__global char4*)srcData + (src_y + 1) * srcStep / 4))[x]);
+        sum = sum + co3 * convert_float4(((__global ushort4*)((__global char4*)srcData + (src_y + 2) * srcStep / 4))[x]);
+
+        smem[2 + get_local_id(0)] = sum;
+
+        if (get_local_id(0) < 2)
+        {
+            const int left_x = x - 2;
+
+            sum =       co3 * convert_float4(((__global ushort4*)((__global char4*)srcData + (src_y - 2) * srcStep / 4))[left_x]);
+            sum = sum + co2 * convert_float4(((__global ushort4*)((__global char4*)srcData + (src_y - 1) * srcStep / 4))[left_x]);
+            sum = sum + co1 * convert_float4(((__global ushort4*)((__global char4*)srcData + (src_y    ) * srcStep / 4))[left_x]);
+            sum = sum + co2 * convert_float4(((__global ushort4*)((__global char4*)srcData + (src_y + 1) * srcStep / 4))[left_x]);
+            sum = sum + co3 * convert_float4(((__global ushort4*)((__global char4*)srcData + (src_y + 2) * srcStep / 4))[left_x]);
+
+            smem[get_local_id(0)] = sum;
+        }
+
+        if (get_local_id(0) > 253)
+        {
+            const int right_x = x + 2;
+
+            sum =       co3 * convert_float4(((__global ushort4*)((__global char4*)srcData + (src_y - 2) * srcStep / 4))[right_x]);
+            sum = sum + co2 * convert_float4(((__global ushort4*)((__global char4*)srcData + (src_y - 1) * srcStep / 4))[right_x]);
+            sum = sum + co1 * convert_float4(((__global ushort4*)((__global char4*)srcData + (src_y    ) * srcStep / 4))[right_x]);
+            sum = sum + co2 * convert_float4(((__global ushort4*)((__global char4*)srcData + (src_y + 1) * srcStep / 4))[right_x]);
+            sum = sum + co3 * convert_float4(((__global ushort4*)((__global char4*)srcData + (src_y + 2) * srcStep / 4))[right_x]);
+
+            smem[4 + get_local_id(0)] = sum;
+        }
+    }
+    else
+    {
+        int col = idx_col(x, last_col);
+
+        sum =       co3 * convert_float4(((__global ushort4*)((__global char4*)srcData + idx_row(src_y - 2, last_row) * srcStep / 4))[col]);
+        sum = sum + co2 * convert_float4(((__global ushort4*)((__global char4*)srcData + idx_row(src_y - 1, last_row) * srcStep / 4))[col]);
+        sum = sum + co1 * convert_float4(((__global ushort4*)((__global char4*)srcData + idx_row(src_y    , last_row) * srcStep / 4))[col]);
+        sum = sum + co2 * convert_float4(((__global ushort4*)((__global char4*)srcData + idx_row(src_y + 1, last_row) * srcStep / 4))[col]);
+        sum = sum + co3 * convert_float4(((__global ushort4*)((__global char4*)srcData + idx_row(src_y + 2, last_row) * srcStep / 4))[col]);
+
+        smem[2 + get_local_id(0)] = sum;
+
+        if (get_local_id(0) < 2)
+        {
+            const int left_x = x - 2;
+
+            col = idx_col(left_x, last_col);
+
+            sum =       co3 * convert_float4(((__global ushort4*)((__global char4*)srcData + idx_row(src_y - 2, last_row) * srcStep / 4))[col]);
+            sum = sum + co2 * convert_float4(((__global ushort4*)((__global char4*)srcData + idx_row(src_y - 1, last_row) * srcStep / 4))[col]);
+            sum = sum + co1 * convert_float4(((__global ushort4*)((__global char4*)srcData + idx_row(src_y    , last_row) * srcStep / 4))[col]);
+            sum = sum + co2 * convert_float4(((__global ushort4*)((__global char4*)srcData + idx_row(src_y + 1, last_row) * srcStep / 4))[col]);
+            sum = sum + co3 * convert_float4(((__global ushort4*)((__global char4*)srcData + idx_row(src_y + 2, last_row) * srcStep / 4))[col]);
+
+            smem[get_local_id(0)] = sum;
+        }
+
+        if (get_local_id(0) > 253)
+        {
+            const int right_x = x + 2;
+
+            col = idx_col(right_x, last_col);
+
+            sum =       co3 * convert_float4(((__global ushort4*)((__global char4*)srcData + idx_row(src_y - 2, last_row) * srcStep / 4))[col]);
+            sum = sum + co2 * convert_float4(((__global ushort4*)((__global char4*)srcData + idx_row(src_y - 1, last_row) * srcStep / 4))[col]);
+            sum = sum + co1 * convert_float4(((__global ushort4*)((__global char4*)srcData + idx_row(src_y    , last_row) * srcStep / 4))[col]);
+            sum = sum + co2 * convert_float4(((__global ushort4*)((__global char4*)srcData + idx_row(src_y + 1, last_row) * srcStep / 4))[col]);
+            sum = sum + co3 * convert_float4(((__global ushort4*)((__global char4*)srcData + idx_row(src_y + 2, last_row) * srcStep / 4))[col]);
+
+            smem[4 + get_local_id(0)] = sum;
+        }
+    }
+
+    barrier(CLK_LOCAL_MEM_FENCE);
+
+    if (get_local_id(0) < 128)
+    {
+        const int tid2 = get_local_id(0) * 2;
+
+        sum =       co3 * smem[2 + tid2 - 2];
+        sum = sum + co2 * smem[2 + tid2 - 1];
+        sum = sum + co1 * smem[2 + tid2    ];
+        sum = sum + co2 * smem[2 + tid2 + 1];
+        sum = sum + co3 * smem[2 + tid2 + 2];
+
+        const int dst_x = (get_group_id(0) * get_local_size(0) + tid2) / 2;
+
+        if (dst_x < dstCols)
+            dst[y * dstStep / 8 + dst_x] = convert_ushort4_sat_rte(sum);
+    }
+}
+
+///////////////////////////////////////////////////////////////////////
+//////////////////////////  CV_16SC1 //////////////////////////////////
+///////////////////////////////////////////////////////////////////////
+
+__kernel void pyrDown_C1_D3(__global short * srcData, int srcStep, int srcRows, int srcCols, __global short *dst, int dstStep, int dstCols)
+{
+    const int x = get_global_id(0);
+    const int y = get_group_id(1);
+
+    __local float smem[256 + 4];
+
+    float sum;
+
+    const int src_y = 2*y;
+    const int last_row = srcRows - 1;
+    const int last_col = srcCols - 1;
+
+    if (src_y >= 2 && src_y < srcRows - 2 && x >= 2 && x < srcCols - 2)
+    {
+        sum =       0.0625f * ((__global short*)((__global char*)srcData + (src_y - 2) * srcStep))[x];
+        sum = sum + 0.25f   * ((__global short*)((__global char*)srcData + (src_y - 1) * srcStep))[x];
+        sum = sum + 0.375f  * ((__global short*)((__global char*)srcData + (src_y    ) * srcStep))[x];
+        sum = sum + 0.25f   * ((__global short*)((__global char*)srcData + (src_y + 1) * srcStep))[x];
+        sum = sum + 0.0625f * ((__global short*)((__global char*)srcData + (src_y + 2) * srcStep))[x];
+
+        smem[2 + get_local_id(0)] = sum;
+
+        if (get_local_id(0) < 2)
+        {
+            const int left_x = x - 2;
+
+            sum =       0.0625f * ((__global short*)((__global char*)srcData + (src_y - 2) * srcStep))[left_x];
+            sum = sum + 0.25f   * ((__global short*)((__global char*)srcData + (src_y - 1) * srcStep))[left_x];
+            sum = sum + 0.375f  * ((__global short*)((__global char*)srcData + (src_y    ) * srcStep))[left_x];
+            sum = sum + 0.25f   * ((__global short*)((__global char*)srcData + (src_y + 1) * srcStep))[left_x];
+            sum = sum + 0.0625f * ((__global short*)((__global char*)srcData + (src_y + 2) * srcStep))[left_x];
+
+            smem[get_local_id(0)] = sum;
+        }
+
+        if (get_local_id(0) > 253)
+        {
+            const int right_x = x + 2;
+
+            sum =       0.0625f * ((__global short*)((__global char*)srcData + (src_y - 2) * srcStep))[right_x];
+            sum = sum + 0.25f   * ((__global short*)((__global char*)srcData + (src_y - 1) * srcStep))[right_x];
+            sum = sum + 0.375f  * ((__global short*)((__global char*)srcData + (src_y    ) * srcStep))[right_x];
+            sum = sum + 0.25f   * ((__global short*)((__global char*)srcData + (src_y + 1) * srcStep))[right_x];
+            sum = sum + 0.0625f * ((__global short*)((__global char*)srcData + (src_y + 2) * srcStep))[right_x];
+
+            smem[4 + get_local_id(0)] = sum;
+        }
+    }
+    else
+    {
+        int col = idx_col(x, last_col);
+
+        sum =       0.0625f * ((__global short*)((__global char*)srcData + idx_row(src_y - 2, last_row) * srcStep))[col];
+        sum = sum + 0.25f   * ((__global short*)((__global char*)srcData + idx_row(src_y - 1, last_row) * srcStep))[col];
+        sum = sum + 0.375f  * ((__global short*)((__global char*)srcData + idx_row(src_y    , last_row) * srcStep))[col];
+        sum = sum + 0.25f   * ((__global short*)((__global char*)srcData + idx_row(src_y + 1, last_row) * srcStep))[col];
+        sum = sum + 0.0625f * ((__global short*)((__global char*)srcData + idx_row(src_y + 2, last_row) * srcStep))[col];
+
+        smem[2 + get_local_id(0)] = sum;
+
+        if (get_local_id(0) < 2)
+        {
+            const int left_x = x - 2;
+
+            col = idx_col(left_x, last_col);
+
+            sum =       0.0625f * ((__global short*)((__global char*)srcData + idx_row(src_y - 2, last_row) * srcStep))[col];
+            sum = sum + 0.25f   * ((__global short*)((__global char*)srcData + idx_row(src_y - 1, last_row) * srcStep))[col];
+            sum = sum + 0.375f  * ((__global short*)((__global char*)srcData + idx_row(src_y    , last_row) * srcStep))[col];
+            sum = sum + 0.25f   * ((__global short*)((__global char*)srcData + idx_row(src_y + 1, last_row) * srcStep))[col];
+            sum = sum + 0.0625f * ((__global short*)((__global char*)srcData + idx_row(src_y + 2, last_row) * srcStep))[col];
+
+            smem[get_local_id(0)] = sum;
+        }
+
+        if (get_local_id(0) > 253)
+        {
+            const int right_x = x + 2;
+
+            col = idx_col(right_x, last_col);
+
+            sum =       0.0625f * ((__global short*)((__global char*)srcData + idx_row(src_y - 2, last_row) * srcStep))[col];
+            sum = sum + 0.25f   * ((__global short*)((__global char*)srcData + idx_row(src_y - 1, last_row) * srcStep))[col];
+            sum = sum + 0.375f  * ((__global short*)((__global char*)srcData + idx_row(src_y    , last_row) * srcStep))[col];
+            sum = sum + 0.25f   * ((__global short*)((__global char*)srcData + idx_row(src_y + 1, last_row) * srcStep))[col];
+            sum = sum + 0.0625f * ((__global short*)((__global char*)srcData + idx_row(src_y + 2, last_row) * srcStep))[col];
+
+            smem[4 + get_local_id(0)] = sum;
+        }
+    }
+
+    barrier(CLK_LOCAL_MEM_FENCE);
+
+    if (get_local_id(0) < 128)
+    {
+        const int tid2 = get_local_id(0) * 2;
+
+        sum =       0.0625f * smem[2 + tid2 - 2];
+        sum = sum + 0.25f   * smem[2 + tid2 - 1];
+        sum = sum + 0.375f  * smem[2 + tid2    ];
+        sum = sum + 0.25f   * smem[2 + tid2 + 1];
+        sum = sum + 0.0625f * smem[2 + tid2 + 2];
+
+        const int dst_x = (get_group_id(0) * get_local_size(0) + tid2) / 2;
+
+        if (dst_x < dstCols)
+            dst[y * dstStep / 2 + dst_x] = convert_short_sat_rte(sum);
+    }
+}
+
+///////////////////////////////////////////////////////////////////////
+//////////////////////////  CV_16SC4 //////////////////////////////////
+///////////////////////////////////////////////////////////////////////
+
+__kernel void pyrDown_C4_D3(__global short4 * srcData, int srcStep, int srcRows, int srcCols, __global short4 *dst, int dstStep, int dstCols)
+{
+    const int x = get_global_id(0);
+    const int y = get_group_id(1);
+
+    __local float4 smem[256 + 4];
+
+    float4 sum;
+
+    const int src_y = 2*y;
+    const int last_row = srcRows - 1;
+    const int last_col = srcCols - 1;
+
+    float4 co1 = 0.375f;
+    float4 co2 = 0.25f;
+    float4 co3 = 0.0625f;
+
+    if (src_y >= 2 && src_y < srcRows - 2 && x >= 2 && x < srcCols - 2)
+    {
+        sum =       co3 * convert_float4(((__global short4*)((__global char4*)srcData + (src_y - 2) * srcStep / 4))[x]);
+        sum = sum + co2 * convert_float4(((__global short4*)((__global char4*)srcData + (src_y - 1) * srcStep / 4))[x]);
+        sum = sum + co1 * convert_float4(((__global short4*)((__global char4*)srcData + (src_y    ) * srcStep / 4))[x]);
+        sum = sum + co2 * convert_float4(((__global short4*)((__global char4*)srcData + (src_y + 1) * srcStep / 4))[x]);
+        sum = sum + co3 * convert_float4(((__global short4*)((__global char4*)srcData + (src_y + 2) * srcStep / 4))[x]);
+
+        smem[2 + get_local_id(0)] = sum;
+
+        if (get_local_id(0) < 2)
+        {
+            const int left_x = x - 2;
+
+            sum =       co3 * convert_float4(((__global short4*)((__global char4*)srcData + (src_y - 2) * srcStep / 4))[left_x]);
+            sum = sum + co2 * convert_float4(((__global short4*)((__global char4*)srcData + (src_y - 1) * srcStep / 4))[left_x]);
+            sum = sum + co1 * convert_float4(((__global short4*)((__global char4*)srcData + (src_y    ) * srcStep / 4))[left_x]);
+            sum = sum + co2 * convert_float4(((__global short4*)((__global char4*)srcData + (src_y + 1) * srcStep / 4))[left_x]);
+            sum = sum + co3 * convert_float4(((__global short4*)((__global char4*)srcData + (src_y + 2) * srcStep / 4))[left_x]);
+
+            smem[get_local_id(0)] = sum;
+        }
+
+        if (get_local_id(0) > 253)
+        {
+            const int right_x = x + 2;
+
+            sum =       co3 * convert_float4(((__global short4*)((__global char4*)srcData + (src_y - 2) * srcStep / 4))[right_x]);
+            sum = sum + co2 * convert_float4(((__global short4*)((__global char4*)srcData + (src_y - 1) * srcStep / 4))[right_x]);
+            sum = sum + co1 * convert_float4(((__global short4*)((__global char4*)srcData + (src_y    ) * srcStep / 4))[right_x]);
+            sum = sum + co2 * convert_float4(((__global short4*)((__global char4*)srcData + (src_y + 1) * srcStep / 4))[right_x]);
+            sum = sum + co3 * convert_float4(((__global short4*)((__global char4*)srcData + (src_y + 2) * srcStep / 4))[right_x]);
+
+            smem[4 + get_local_id(0)] = sum;
+        }
+    }
+    else
+    {
+        int col = idx_col(x, last_col);
+
+        sum =       co3 * convert_float4(((__global short4*)((__global char4*)srcData + idx_row(src_y - 2, last_row) * srcStep / 4))[col]);
+        sum = sum + co2 * convert_float4(((__global short4*)((__global char4*)srcData + idx_row(src_y - 1, last_row) * srcStep / 4))[col]);
+        sum = sum + co1 * convert_float4(((__global short4*)((__global char4*)srcData + idx_row(src_y    , last_row) * srcStep / 4))[col]);
+        sum = sum + co2 * convert_float4(((__global short4*)((__global char4*)srcData + idx_row(src_y + 1, last_row) * srcStep / 4))[col]);
+        sum = sum + co3 * convert_float4(((__global short4*)((__global char4*)srcData + idx_row(src_y + 2, last_row) * srcStep / 4))[col]);
+
+        smem[2 + get_local_id(0)] = sum;
+
+        if (get_local_id(0) < 2)
+        {
+            const int left_x = x - 2;
+
+            col = idx_col(left_x, last_col);
+
+            sum =       co3 * convert_float4(((__global short4*)((__global char4*)srcData + idx_row(src_y - 2, last_row) * srcStep / 4))[col]);
+            sum = sum + co2 * convert_float4(((__global short4*)((__global char4*)srcData + idx_row(src_y - 1, last_row) * srcStep / 4))[col]);
+            sum = sum + co1 * convert_float4(((__global short4*)((__global char4*)srcData + idx_row(src_y    , last_row) * srcStep / 4))[col]);
+            sum = sum + co2 * convert_float4(((__global short4*)((__global char4*)srcData + idx_row(src_y + 1, last_row) * srcStep / 4))[col]);
+            sum = sum + co3 * convert_float4(((__global short4*)((__global char4*)srcData + idx_row(src_y + 2, last_row) * srcStep / 4))[col]);
+
+            smem[get_local_id(0)] = sum;
+        }
+
+        if (get_local_id(0) > 253)
+        {
+            const int right_x = x + 2;
+
+            col = idx_col(right_x, last_col);
+
+            sum =       co3 * convert_float4(((__global short4*)((__global char4*)srcData + idx_row(src_y - 2, last_row) * srcStep / 4))[col]);
+            sum = sum + co2 * convert_float4(((__global short4*)((__global char4*)srcData + idx_row(src_y - 1, last_row) * srcStep / 4))[col]);
+            sum = sum + co1 * convert_float4(((__global short4*)((__global char4*)srcData + idx_row(src_y    , last_row) * srcStep / 4))[col]);
+            sum = sum + co2 * convert_float4(((__global short4*)((__global char4*)srcData + idx_row(src_y + 1, last_row) * srcStep / 4))[col]);
+            sum = sum + co3 * convert_float4(((__global short4*)((__global char4*)srcData + idx_row(src_y + 2, last_row) * srcStep / 4))[col]);
+
+            smem[4 + get_local_id(0)] = sum;
+        }
+    }
+
+    barrier(CLK_LOCAL_MEM_FENCE);
+
+    if (get_local_id(0) < 128)
+    {
+        const int tid2 = get_local_id(0) * 2;
+
+        sum =       co3 * smem[2 + tid2 - 2];
+        sum = sum + co2 * smem[2 + tid2 - 1];
+        sum = sum + co1 * smem[2 + tid2    ];
+        sum = sum + co2 * smem[2 + tid2 + 1];
+        sum = sum + co3 * smem[2 + tid2 + 2];
+
+        const int dst_x = (get_group_id(0) * get_local_size(0) + tid2) / 2;
+
+        if (dst_x < dstCols)
+            dst[y * dstStep / 8 + dst_x] = convert_short4_sat_rte(sum);
+    }
+}
+
+///////////////////////////////////////////////////////////////////////
+//////////////////////////  CV_32FC1 //////////////////////////////////
+///////////////////////////////////////////////////////////////////////
+
+__kernel void pyrDown_C1_D5(__global float * srcData, int srcStep, int srcRows, int srcCols, __global float *dst, int dstStep, int dstCols)
+{
+    const int x = get_global_id(0);
+    const int y = get_group_id(1);
+
+    __local float smem[256 + 4];
+
+    float sum;
+
+    const int src_y = 2*y;
+    const int last_row = srcRows - 1;
+    const int last_col = srcCols - 1;
+
+    if (src_y >= 2 && src_y < srcRows - 2 && x >= 2 && x < srcCols - 2)
+    {
+        sum =       0.0625f * ((__global float*)((__global char*)srcData + (src_y - 2) * srcStep))[x];
+        sum = sum + 0.25f   * ((__global float*)((__global char*)srcData + (src_y - 1) * srcStep))[x];
+        sum = sum + 0.375f  * ((__global float*)((__global char*)srcData + (src_y    ) * srcStep))[x];
+        sum = sum + 0.25f   * ((__global float*)((__global char*)srcData + (src_y + 1) * srcStep))[x];
+        sum = sum + 0.0625f * ((__global float*)((__global char*)srcData + (src_y + 2) * srcStep))[x];
+
+        smem[2 + get_local_id(0)] = sum;
+
+        if (get_local_id(0) < 2)
+        {
+            const int left_x = x - 2;
+
+            sum =       0.0625f * ((__global float*)((__global char*)srcData + (src_y - 2) * srcStep))[left_x];
+            sum = sum + 0.25f   * ((__global float*)((__global char*)srcData + (src_y - 1) * srcStep))[left_x];
+            sum = sum + 0.375f  * ((__global float*)((__global char*)srcData + (src_y    ) * srcStep))[left_x];
+            sum = sum + 0.25f   * ((__global float*)((__global char*)srcData + (src_y + 1) * srcStep))[left_x];
+            sum = sum + 0.0625f * ((__global float*)((__global char*)srcData + (src_y + 2) * srcStep))[left_x];
+
+            smem[get_local_id(0)] = sum;
+        }
+
+        if (get_local_id(0) > 253)
+        {
+            const int right_x = x + 2;
+
+            sum =       0.0625f * ((__global float*)((__global char*)srcData + (src_y - 2) * srcStep))[right_x];
+            sum = sum + 0.25f   * ((__global float*)((__global char*)srcData + (src_y - 1) * srcStep))[right_x];
+            sum = sum + 0.375f  * ((__global float*)((__global char*)srcData + (src_y    ) * srcStep))[right_x];
+            sum = sum + 0.25f   * ((__global float*)((__global char*)srcData + (src_y + 1) * srcStep))[right_x];
+            sum = sum + 0.0625f * ((__global float*)((__global char*)srcData + (src_y + 2) * srcStep))[right_x];
+
+            smem[4 + get_local_id(0)] = sum;
+        }
+    }
+    else
+    {
+        int col = idx_col(x, last_col);
+
+        sum =       0.0625f * ((__global float*)((__global char*)srcData + idx_row(src_y - 2, last_row) * srcStep))[col];
+        sum = sum + 0.25f   * ((__global float*)((__global char*)srcData + idx_row(src_y - 1, last_row) * srcStep))[col];
+        sum = sum + 0.375f  * ((__global float*)((__global char*)srcData + idx_row(src_y    , last_row) * srcStep))[col];
+        sum = sum + 0.25f   * ((__global float*)((__global char*)srcData + idx_row(src_y + 1, last_row) * srcStep))[col];
+        sum = sum + 0.0625f * ((__global float*)((__global char*)srcData + idx_row(src_y + 2, last_row) * srcStep))[col];
+
+        smem[2 + get_local_id(0)] = sum;
+
+        if (get_local_id(0) < 2)
+        {
+            const int left_x = x - 2;
+
+            col = idx_col(left_x, last_col);
+
+            sum =       0.0625f * ((__global float*)((__global char*)srcData + idx_row(src_y - 2, last_row) * srcStep))[col];
+            sum = sum + 0.25f   * ((__global float*)((__global char*)srcData + idx_row(src_y - 1, last_row) * srcStep))[col];
+            sum = sum + 0.375f  * ((__global float*)((__global char*)srcData + idx_row(src_y    , last_row) * srcStep))[col];
+            sum = sum + 0.25f   * ((__global float*)((__global char*)srcData + idx_row(src_y + 1, last_row) * srcStep))[col];
+            sum = sum + 0.0625f * ((__global float*)((__global char*)srcData + idx_row(src_y + 2, last_row) * srcStep))[col];
+
+            smem[get_local_id(0)] = sum;
+        }
+
+        if (get_local_id(0) > 253)
+        {
+            const int right_x = x + 2;
+
+            col = idx_col(right_x, last_col);
+
+            sum =       0.0625f * ((__global float*)((__global char*)srcData + idx_row(src_y - 2, last_row) * srcStep))[col];
+            sum = sum + 0.25f   * ((__global float*)((__global char*)srcData + idx_row(src_y - 1, last_row) * srcStep))[col];
+            sum = sum + 0.375f  * ((__global float*)((__global char*)srcData + idx_row(src_y    , last_row) * srcStep))[col];
+            sum = sum + 0.25f   * ((__global float*)((__global char*)srcData + idx_row(src_y + 1, last_row) * srcStep))[col];
+            sum = sum + 0.0625f * ((__global float*)((__global char*)srcData + idx_row(src_y + 2, last_row) * srcStep))[col];
+
+            smem[4 + get_local_id(0)] = sum;
+        }
+    }
+
+    barrier(CLK_LOCAL_MEM_FENCE);
+
+    if (get_local_id(0) < 128)
+    {
+        const int tid2 = get_local_id(0) * 2;
+
+        sum =       0.0625f * smem[2 + tid2 - 2];
+        sum = sum + 0.25f   * smem[2 + tid2 - 1];
+        sum = sum + 0.375f  * smem[2 + tid2    ];
+        sum = sum + 0.25f   * smem[2 + tid2 + 1];
+        sum = sum + 0.0625f * smem[2 + tid2 + 2];
+
+        const int dst_x = (get_group_id(0) * get_local_size(0) + tid2) / 2;
+
+        if (dst_x < dstCols)
+            dst[y * dstStep / 4 + dst_x] = sum;
+    }
+}
+
+///////////////////////////////////////////////////////////////////////
+//////////////////////////  CV_32FC4 //////////////////////////////////
+///////////////////////////////////////////////////////////////////////
+
+__kernel void pyrDown_C4_D5(__global float4 * srcData, int srcStep, int srcRows, int srcCols, __global float4 *dst, int dstStep, int dstCols)
+{
+    const int x = get_global_id(0);
+    const int y = get_group_id(1);
+
+    __local float4 smem[256 + 4];
+
+    float4 sum;
+
+    const int src_y = 2*y;
+    const int last_row = srcRows - 1;
+    const int last_col = srcCols - 1;
+
+    float4 co1 = 0.375f;
+    float4 co2 = 0.25f;
+    float4 co3 = 0.0625f;
+
+    if (src_y >= 2 && src_y < srcRows - 2 && x >= 2 && x < srcCols - 2)
+    {
+        sum =       co3 * ((__global float4*)((__global char4*)srcData + (src_y - 2) * srcStep / 4))[x];
+        sum = sum + co2 * ((__global float4*)((__global char4*)srcData + (src_y - 1) * srcStep / 4))[x];
+        sum = sum + co1 * ((__global float4*)((__global char4*)srcData + (src_y    ) * srcStep / 4))[x];
+        sum = sum + co2 * ((__global float4*)((__global char4*)srcData + (src_y + 1) * srcStep / 4))[x];
+        sum = sum + co3 * ((__global float4*)((__global char4*)srcData + (src_y + 2) * srcStep / 4))[x];
+
+        smem[2 + get_local_id(0)] = sum;
+
+        if (get_local_id(0) < 2)
+        {
+            const int left_x = x - 2;
+
+            sum =       co3 * ((__global float4*)((__global char4*)srcData + (src_y - 2) * srcStep / 4))[left_x];
+            sum = sum + co2 * ((__global float4*)((__global char4*)srcData + (src_y - 1) * srcStep / 4))[left_x];
+            sum = sum + co1 * ((__global float4*)((__global char4*)srcData + (src_y    ) * srcStep / 4))[left_x];
+            sum = sum + co2 * ((__global float4*)((__global char4*)srcData + (src_y + 1) * srcStep / 4))[left_x];
+            sum = sum + co3 * ((__global float4*)((__global char4*)srcData + (src_y + 2) * srcStep / 4))[left_x];
+
+            smem[get_local_id(0)] = sum;
+        }
+
+        if (get_local_id(0) > 253)
+        {
+            const int right_x = x + 2;
+
+            sum =       co3 * ((__global float4*)((__global char4*)srcData + (src_y - 2) * srcStep / 4))[right_x];
+            sum = sum + co2 * ((__global float4*)((__global char4*)srcData + (src_y - 1) * srcStep / 4))[right_x];
+            sum = sum + co1 * ((__global float4*)((__global char4*)srcData + (src_y    ) * srcStep / 4))[right_x];
+            sum = sum + co2 * ((__global float4*)((__global char4*)srcData + (src_y + 1) * srcStep / 4))[right_x];
+            sum = sum + co3 * ((__global float4*)((__global char4*)srcData + (src_y + 2) * srcStep / 4))[right_x];
+
+            smem[4 + get_local_id(0)] = sum;
+        }
+    }
+    else
+    {
+        int col = idx_col(x, last_col);
+
+        sum =       co3 * ((__global float4*)((__global char4*)srcData + idx_row(src_y - 2, last_row) * srcStep / 4))[col];
+        sum = sum + co2 * ((__global float4*)((__global char4*)srcData + idx_row(src_y - 1, last_row) * srcStep / 4))[col];
+        sum = sum + co1 * ((__global float4*)((__global char4*)srcData + idx_row(src_y    , last_row) * srcStep / 4))[col];
+        sum = sum + co2 * ((__global float4*)((__global char4*)srcData + idx_row(src_y + 1, last_row) * srcStep / 4))[col];
+        sum = sum + co3 * ((__global float4*)((__global char4*)srcData + idx_row(src_y + 2, last_row) * srcStep / 4))[col];
+
+        smem[2 + get_local_id(0)] = sum;
+
+        if (get_local_id(0) < 2)
+        {
+            const int left_x = x - 2;
+
+            col = idx_col(left_x, last_col);
+
+            sum =       co3 * ((__global float4*)((__global char4*)srcData + idx_row(src_y - 2, last_row) * srcStep / 4))[col];
+            sum = sum + co2 * ((__global float4*)((__global char4*)srcData + idx_row(src_y - 1, last_row) * srcStep / 4))[col];
+            sum = sum + co1 * ((__global float4*)((__global char4*)srcData + idx_row(src_y    , last_row) * srcStep / 4))[col];
+            sum = sum + co2 * ((__global float4*)((__global char4*)srcData + idx_row(src_y + 1, last_row) * srcStep / 4))[col];
+            sum = sum + co3 * ((__global float4*)((__global char4*)srcData + idx_row(src_y + 2, last_row) * srcStep / 4))[col];
+
+            smem[get_local_id(0)] = sum;
+        }
+
+        if (get_local_id(0) > 253)
+        {
+            const int right_x = x + 2;
+
+            col = idx_col(right_x, last_col);
+
+            sum =       co3 * ((__global float4*)((__global char4*)srcData + idx_row(src_y - 2, last_row) * srcStep / 4))[col];
+            sum = sum + co2 * ((__global float4*)((__global char4*)srcData + idx_row(src_y - 1, last_row) * srcStep / 4))[col];
+            sum = sum + co1 * ((__global float4*)((__global char4*)srcData + idx_row(src_y    , last_row) * srcStep / 4))[col];
+            sum = sum + co2 * ((__global float4*)((__global char4*)srcData + idx_row(src_y + 1, last_row) * srcStep / 4))[col];
+            sum = sum + co3 * ((__global float4*)((__global char4*)srcData + idx_row(src_y + 2, last_row) * srcStep / 4))[col];
+
+            smem[4 + get_local_id(0)] = sum;
+        }
+    }
+
+    barrier(CLK_LOCAL_MEM_FENCE);
+
+    if (get_local_id(0) < 128)
+    {
+        const int tid2 = get_local_id(0) * 2;
+
+        sum =       co3 * smem[2 + tid2 - 2];
+        sum = sum + co2 * smem[2 + tid2 - 1];
+        sum = sum + co1 * smem[2 + tid2    ];
+        sum = sum + co2 * smem[2 + tid2 + 1];
+        sum = sum + co3 * smem[2 + tid2 + 2];
+
+        const int dst_x = (get_group_id(0) * get_local_size(0) + tid2) / 2;
+
+        if (dst_x < dstCols)
+            dst[y * dstStep / 16 + dst_x] = sum;
+    }
+}

modules/imgproc/src/pyramids.cpp

@@ -41,6 +41,7 @@
 //M*/
 
 #include "precomp.hpp"
+#include "opencl_kernels.hpp"
 
 namespace cv
 {
@@ -402,8 +403,51 @@ typedef void (*PyrFunc)(const Mat&, Mat&, int);
 
 }
 
+namespace cv
+{
+
+static bool ocl_pyrDown( InputArray _src, OutputArray _dst, const Size& _dsz, int borderType)
+{
+    int type = _src.type(), depth = CV_MAT_DEPTH(type), channels = CV_MAT_CN(type);
+
+    if (depth != CV_8U && depth != CV_16U && depth != CV_16S && depth != CV_32F)
+        return false;
+    if (channels != 1 && channels != 3 && channels != 4)
+        return false;
+    double doubleSupport = ocl::Device::getDefault().doubleFPConfig() > 0;
+
+    UMat src = _src.getUMat();
+    Size dsize = cv::Size((src.rows + 1) / 2, (src.cols + 1) / 2);
+    _dst.create( dsize, src.type() );
+    UMat dst = _dst.getUMat();
+
+    const char * const kernelName = "pyrDown";
+    ocl::ProgramSource2 program = ocl::imgproc::pyr_down_oclsrc;
+    ocl::Kernel k;
+
+    char cvt[2][50];
+    k.create(kernelName, program,
+                 format("-D T=%s -D cn=%d -D convertToT=%s%s -D convertToFT=%s%s", 
+                 ocl::typeToStr(type), channels, 
+                 ocl::convertTypeStr(CV_32F, depth, channels, cvt[0]),
+                 ocl::convertTypeStr(depth, CV_32F, channels, cvt[1]),
+                 doubleSupport ? " -D DOUBLE_SUPPORT" : ""));
+
+    k.args(ocl::KernelArg::ReadOnly(src), ocl::KernelArg::WriteOnly(dst));
+    
+    size_t localThreads[2]  = { 256, 1 };
+    size_t globalThreads[2] = { src.cols, dst.rows };
+    return k.run(2, globalThreads, localThreads, false);
+}
+
+}
+
 void cv::pyrDown( InputArray _src, OutputArray _dst, const Size& _dsz, int borderType )
 {
+    if (ocl::useOpenCL() && _dst.isUMat() &&
+        ocl_pyrDown(_src, _dst, _dsz, borderType))
+    return;
+
     Mat src = _src.getMat();
     Size dsz = _dsz == Size() ? Size((src.cols + 1)/2, (src.rows + 1)/2) : _dsz;
     _dst.create( dsz, src.type() );

modules/imgproc/test/ocl/test_pyramids.cpp

+///////////////////////////////////////////////////////////////////////////////////////
+//
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  By downloading, copying, installing or using the software you agree to this license.
+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                           License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2010-2012, Institute Of Software Chinese Academy Of Science, all rights reserved.
+// Copyright (C) 2010-2012, Advanced Micro Devices, Inc., all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// @Authors
+//    Yao Wang yao@multicorewareinc.com
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//   * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//   * The name of the copyright holders may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+
+#include "test_precomp.hpp"
+#include <iomanip>
+
+#ifdef HAVE_OPENCL
+
+using namespace cv;
+using namespace testing;
+using namespace std;
+
+PARAM_TEST_CASE(PyrBase, MatDepth, Channels)
+{
+    int depth;
+    int channels;
+
+    Mat dst_cpu;
+    ocl::oclMat gdst;
+
+    virtual void SetUp()
+    {
+        depth = GET_PARAM(0);
+        channels = GET_PARAM(1);
+    }
+};
+
+/////////////////////// PyrDown //////////////////////////
+
+typedef PyrBase PyrDown;
+
+OCL_TEST_P(PyrDown, Mat)
+{
+    for (int j = 0; j < LOOP_TIMES; j++)
+    {
+        Size size(MWIDTH, MHEIGHT);
+        Mat src = randomMat(size, CV_MAKETYPE(depth, channels), 0, 255);
+        ocl::oclMat gsrc(src);
+
+        pyrDown(src, dst_cpu);
+        ocl::pyrDown(gsrc, gdst);
+
+        EXPECT_MAT_NEAR(dst_cpu, Mat(gdst), depth == CV_32F ? 1e-4f : 1.0f);
+    }
+}
+
+INSTANTIATE_TEST_CASE_P(OCL_ImgProc, PyrDown, Combine(
+                            Values(CV_8U, CV_16U, CV_16S, CV_32F),
+                            Values(1, 3, 4)));
+
+/////////////////////// PyrUp //////////////////////////
+
+typedef PyrBase PyrUp;
+
+OCL_TEST_P(PyrUp, Accuracy)
+{
+    for (int j = 0; j < LOOP_TIMES; j++)
+    {
+        Size size(MWIDTH, MHEIGHT);
+        Mat src = randomMat(size, CV_MAKETYPE(depth, channels), 0, 255);
+        ocl::oclMat gsrc(src);
+
+        pyrUp(src, dst_cpu);
+        ocl::pyrUp(gsrc, gdst);
+
+        EXPECT_MAT_NEAR(dst_cpu, Mat(gdst), (depth == CV_32F ? 1e-4f : 1.0));
+    }
+}
+
+
+INSTANTIATE_TEST_CASE_P(OCL_ImgProc, PyrUp, Combine(
+                            Values(CV_8U, CV_16U, CV_16S, CV_32F),
+                            Values(1, 3, 4)));
+#endif // HAVE_OPENCL