Adding of OCL versions of Concat, Split, Slice layers

Moving more Caffe loaders to sparate file

modules/dnn/include/opencv2/dnn/all_layers.hpp

@@ -275,9 +275,37 @@ namespace dnn
         static Ptr<InnerProductLayer> create(int axis = 1);
     };
 
+    /* Reshaping */
+
+    class CV_EXPORTS_W ConcatLayer : public Layer
+    {
+    public:
+        int axis;
+
+        static Ptr<ConcatLayer> create(int axis = 1);
+    };
+
+    class CV_EXPORTS_W SplitLayer : public Layer
+    {
+    public:
+        int outputsCount; //!< Number of copies that will be produced (is ignored when negative).
+
+        static Ptr<SplitLayer> create(int outputsCount = -1);
+    };
+
+    class CV_EXPORTS_W SliceLayer : public Layer
+    {
+    public:
+        int axis;
+        std::vector<int> sliceIndices;
+
+        static Ptr<SliceLayer> create(int axis);
+        static Ptr<SliceLayer> create(int axis, const std::vector<int> &sliceIndices);
+    };
+
     /* Activations */
 
-    class ReLULayer : public Layer
+    class CV_EXPORTS_W ReLULayer : public Layer
     {
     public:
         double negativeSlope;
@@ -285,31 +313,31 @@ namespace dnn
         static Ptr<ReLULayer> create(double negativeSlope = 0);
     };
 
-    class TanHLayer : public Layer
+    class CV_EXPORTS_W TanHLayer : public Layer
     {
     public:
         static Ptr<TanHLayer> create();
     };
 
-    class SigmoidLayer : public Layer
+    class CV_EXPORTS_W SigmoidLayer : public Layer
     {
     public:
         static Ptr<SigmoidLayer> create();
     };
 
-    class BNLLLayer : public Layer
+    class CV_EXPORTS_W BNLLLayer : public Layer
     {
     public:
         static Ptr<BNLLLayer> create();
     };
 
-    class AbsLayer : public Layer
+    class CV_EXPORTS_W AbsLayer : public Layer
     {
     public:
         static Ptr<AbsLayer> create();
     };
 
-    class PowerLayer : public Layer
+    class CV_EXPORTS_W PowerLayer : public Layer
     {
     public:
         double power, scale, shift;

modules/dnn/include/opencv2/dnn/blob.hpp

@@ -262,6 +262,7 @@ namespace dnn
 
         /** @brief Returns slice of first two dimensions.
          *  @details The behaviour is similar to the following numpy code: blob[n, cn, ...]
+         *  @todo Method will be removed. Use slice() from shape_utils.hpp.
          */
         Mat getPlane(int n, int cn);
 
@@ -282,6 +283,7 @@ namespace dnn
 
         int type() const;       //!< Returns type of the blob.
         int elemSize() const;   //!< Returns size of single element in bytes.
+        int getState() const;   //!< Returns current state of the blob, @see DataState.
 
     private:
         const int *sizes() const;

modules/dnn/include/opencv2/dnn/blob.inl.hpp

@@ -507,6 +507,15 @@ inline int Blob::elemSize() const
     return CV_ELEM_SIZE(type());
 }
 
+inline int Blob::getState() const
+{
+#ifdef CV_DNN_UMAT
+    return this->state;
+#else
+    return m.empty() ? UNINITIALIZED : HEAD_AT_MAT;
+#endif
+}
+
 }
 }
 

modules/dnn/src/caffe/layer_loaders.cpp

 #include "../precomp.hpp"
 #include "layer_loaders.hpp"
 #include <opencv2/dnn/shape_utils.hpp>
-#include "../layers/layers_common.hpp"
 
 namespace cv
 {
 namespace dnn
 {
 
+//Utils
+
+//Extracts params used into Conv, Deconv and Pooling layers
+static void getCaffeConvParams(LayerParams &params, Size &kernel, Size &pad, Size &stride)
+{
+    if (params.has("kernel_h") && params.has("kernel_w"))
+    {
+        kernel.height = params.get<int>("kernel_h");
+        kernel.width = params.get<int>("kernel_w");
+    }
+    else if (params.has("kernel_size"))
+    {
+        kernel.height = kernel.width = params.get<int>("kernel_size");
+    }
+    else
+    {
+        CV_Error(Error::StsBadArg, "kernel_size (or kernel_h and kernel_w) not specified");
+    }
+    CV_Assert(kernel.height > 0 && kernel.width > 0);
+
+    if (params.has("pad_h") && params.has("pad_w"))
+    {
+        pad.height = params.get<int>("pad_h");
+        pad.width = params.get<int>("pad_w");
+    }
+    else
+    {
+        pad.height = pad.width = params.get<int>("pad", 0);
+    }
+    CV_Assert(pad.height >= 0 && pad.width >= 0);
+
+    if (params.has("stride_h") && params.has("stride_w"))
+    {
+        stride.height = params.get<int>("stride_h");
+        stride.width = params.get<int>("stride_w");
+    }
+    else
+    {
+        stride.height = stride.width = params.get<int>("stride", 1);
+    }
+    CV_Assert(stride.height > 0 && stride.width > 0);
+}
+
+//Layers
+
+//Convolution and Deconvolution
+static void initConvDeconvLayerFromCaffe(Ptr<BaseConvolutionLayer> l, LayerParams &params)
+{
+    l->setParamsFrom(params);
+    getCaffeConvParams(params, l->kernel, l->pad, l->stride);
+
+    bool bias = params.get<bool>("bias_term", true);
+    int numOutput = params.get<int>("num_output");
+    int group = params.get<int>("group", 1);
+
+    CV_Assert(numOutput % group == 0);
+    CV_Assert((bias && l->blobs.size() == 2) || (!bias && l->blobs.size() == 1));
+}
+
+template<>
+Ptr<Layer> createLayerFromCaffe<ConvolutionLayer>(LayerParams &params)
+{
+    Ptr<BaseConvolutionLayer> l = ConvolutionLayer::create();
+    initConvDeconvLayerFromCaffe(l, params);
+    return Ptr<Layer>(l);
+}
+
+template<>
+Ptr<Layer> createLayerFromCaffe<DeconvolutionLayer>(LayerParams &params)
+{
+    Ptr<BaseConvolutionLayer> l = DeconvolutionLayer::create();
+    initConvDeconvLayerFromCaffe(l, params);
+    return Ptr<Layer>(l);
+}
+
 template<>
 Ptr<Layer> createLayerFromCaffe<PoolingLayer>(LayerParams &params)
 {
@@ -88,7 +162,54 @@ Ptr<Layer> createLayerFromCaffe<LRNLayer>(LayerParams& params)
     return Ptr<Layer>(LRNLayer::create(type, size, alpha, beta));
 }
 
-//Activation layers
+/* Reshape layers */
+
+template<>
+Ptr<Layer> createLayerFromCaffe<ConcatLayer>(LayerParams& params)
+{
+    return Ptr<Layer>(ConcatLayer::create(params.get<int>("axis", 1)));
+}
+
+template<>
+Ptr<Layer> createLayerFromCaffe<SplitLayer>(LayerParams &params)
+{
+    int outputsCount;
+
+    //TODO: maybe "top_count" param is useless because it can be determined by output connections number
+    if (params.has("top_count"))
+    {
+        outputsCount = params.get<int>("top_count");
+        CV_Assert(outputsCount >= 0);
+    }
+    else
+    {
+        outputsCount = -1;
+    }
+
+    return Ptr<Layer>(SplitLayer::create(outputsCount));
+}
+
+template<>
+Ptr<Layer> createLayerFromCaffe<SliceLayer>(LayerParams& params)
+{
+    int axis = params.get<int>("axis", 1);
+
+    if (!params.has("slice_point"))
+    {
+        return Ptr<Layer>(SliceLayer::create(axis));
+    }
+    else
+    {
+        const DictValue &indicesValue = params.get("slice_point");
+        std::vector<int> sliceIndices(indicesValue.size());
+        for (int i = 0; i < indicesValue.size(); i++)
+            sliceIndices[i] = indicesValue.get<int>(i);
+
+        return Ptr<Layer>(SliceLayer::create(axis, sliceIndices));
+    }
+}
+
+/* Activation layers */
 
 template <typename ActivationLayer> //Intended for parameters-free activations
 Ptr<Layer> createLayerFromCaffe(LayerParams&)
@@ -113,6 +234,8 @@ Ptr<Layer> createLayerFromCaffe<PowerLayer>(LayerParams& params)
 }
 
 //Explicit instantiation
+template Ptr<Layer> createLayerFromCaffe<ConvolutionLayer>(LayerParams&);
+template Ptr<Layer> createLayerFromCaffe<DeconvolutionLayer>(LayerParams&);
 template Ptr<Layer> createLayerFromCaffe<SoftmaxLayer>(LayerParams&);
 template Ptr<Layer> createLayerFromCaffe<InnerProductLayer>(LayerParams&);
 template Ptr<Layer> createLayerFromCaffe<LRNLayer>(LayerParams&);

modules/dnn/src/init.cpp

@@ -40,21 +40,12 @@
 //M*/
 
 #include "precomp.hpp"
+#include "caffe/layer_loaders.hpp"
 
 #include "layers/concat_layer.hpp"
-#include "layers/convolution_layer.hpp"
 #include "layers/blank_layer.hpp"
-#include "layers/elementwise_layers.hpp"
-#include "layers/fully_connected_layer.hpp"
-#include "layers/lrn_layer.hpp"
 #include "layers/mvn_layer.hpp"
-#include "layers/pooling_layer.hpp"
 #include "layers/reshape_layer.hpp"
-#include "layers/slice_layer.hpp"
-#include "layers/softmax_layer.hpp"
-#include "layers/split_layer.hpp"
-
-#include "caffe/layer_loaders.hpp"
 
 namespace cv
 {
@@ -78,15 +69,20 @@ void initModule()
     if (init.status)
         return;
 
-    REG_RUNTIME_LAYER_CLASS(Slice, SliceLayer)
-    REG_RUNTIME_LAYER_CLASS(Split, SplitLayer)
+    REG_RUNTIME_LAYER_FUNC(Slice,           createLayerFromCaffe<SliceLayer>);
+    REG_RUNTIME_LAYER_FUNC(Split,           createLayerFromCaffe<SplitLayer>);
+    REG_RUNTIME_LAYER_FUNC(Concat,          createLayerFromCaffe<ConcatLayer>);
     REG_RUNTIME_LAYER_CLASS(Reshape, ReshapeLayer)
-    REG_RUNTIME_LAYER_CLASS(MVN, MVNLayer)
     REG_RUNTIME_LAYER_FUNC(Flatten, createFlattenLayer);
+    REG_RUNTIME_LAYER_CLASS(Dropout, BlankLayer)
+    REG_RUNTIME_LAYER_CLASS(MVN, MVNLayer)
+
+    REG_RUNTIME_LAYER_FUNC(Convolution,     createLayerFromCaffe<ConvolutionLayer>);
+    REG_RUNTIME_LAYER_FUNC(Deconvolution,   createLayerFromCaffe<DeconvolutionLayer>);
     REG_RUNTIME_LAYER_FUNC(Pooling,         createLayerFromCaffe<PoolingLayer>);
     REG_RUNTIME_LAYER_FUNC(LRN,             createLayerFromCaffe<LRNLayer>);
     REG_RUNTIME_LAYER_FUNC(InnerProduct,    createLayerFromCaffe<InnerProductLayer>);
-    REG_STATIC_LAYER_FUNC(Softmax,          createLayerFromCaffe<SoftmaxLayer>);
+    REG_RUNTIME_LAYER_FUNC(Softmax,         createLayerFromCaffe<SoftmaxLayer>);
 
     REG_RUNTIME_LAYER_FUNC(ReLU,            createLayerFromCaffe<ReLULayer>);
     REG_RUNTIME_LAYER_FUNC(Sigmoid,         createLayerFromCaffe<SigmoidLayer>);
@@ -94,11 +90,6 @@ void initModule()
     REG_RUNTIME_LAYER_FUNC(BNLL,            createLayerFromCaffe<BNLLLayer>);
     REG_RUNTIME_LAYER_FUNC(AbsVal,          createLayerFromCaffe<AbsLayer>);
     REG_RUNTIME_LAYER_FUNC(Power,           createLayerFromCaffe<PowerLayer>);
-    REG_RUNTIME_LAYER_CLASS(Dropout, BlankLayer)
-
-    REG_RUNTIME_LAYER_FUNC(Convolution, createConvolutionLayerFromCaffe)
-    REG_RUNTIME_LAYER_FUNC(Deconvolution, createDeconvolutionLayerFromCaffe)
-    REG_RUNTIME_LAYER_CLASS(Concat, ConcatLayer)
 
     init.status = true;
 }

modules/dnn/src/layers/concat_layer.cpp

@@ -42,60 +42,80 @@
 #include "../precomp.hpp"
 #include "layers_common.hpp"
 #include "concat_layer.hpp"
+#include <opencv2/core/ocl.hpp>
 
 namespace cv
 {
 namespace dnn
 {
-    ConcatLayer::ConcatLayer(LayerParams &params) : Layer(params)
-    {
-        axis = params.get<int>("axis", 1);
-        CV_Assert(axis >= 0);
-    }
 
-    void ConcatLayer::allocate(const std::vector<Blob *> &inputs, std::vector<Blob> &outputs)
-    {
-        CV_Assert(inputs.size() > 0);
+ConcatLayerImpl::ConcatLayerImpl(int axis_ /*= 1*/)
+{
+    axis = axis_;
+}
 
-        int refType = inputs[0]->type();
-        BlobShape refShape = inputs[0]->shape();
-        CV_Assert(axis < refShape.dims());
+void ConcatLayerImpl::allocate(const std::vector<Blob *> &inputs, std::vector<Blob> &outputs)
+{
+    CV_Assert(inputs.size() > 0);
 
-        int axisSum = 0;
-        for (size_t i = 0; i < inputs.size(); i++)
-        {
-            BlobShape curShape = inputs[i]->shape();
+    BlobShape refShape = inputs[0]->shape();
+    axisIdx = inputs[0]->canonicalAxis(axis);
 
-            CV_Assert(curShape.dims() == refShape.dims() && inputs[i]->type() == refType);
-            for (int axisId = 0; axisId < refShape.dims(); axisId++)
-            {
-                if (axisId != axis && refShape[axisId] != curShape[axisId])
-                    CV_Error(Error::StsBadSize, "Inconsitent shape for ConcatLayer");
-            }
+    int axisSum = 0;
+    useOpenCL = false;
+    for (size_t i = 0; i < inputs.size(); i++)
+    {
+        BlobShape curShape = inputs[i]->shape();
 
-            axisSum += curShape[axis];
+        CV_Assert(curShape.dims() == refShape.dims() && inputs[i]->type() == inputs[0]->type());
+        for (int curAxis = 0; curAxis < refShape.dims(); curAxis++)
+        {
+            if (curAxis != axisIdx && refShape[curAxis] != curShape[curAxis])
+                CV_Error(Error::StsBadSize, "Inconsitent shape for ConcatLayer");
         }
 
-        refShape[axis] = axisSum;
-        outputs.resize(1);
-        outputs[0].create(refShape);
+        axisSum += curShape[axisIdx];
+        useOpenCL |= inputs[i]->getState() == Blob::HEAD_AT_MAT;
     }
 
-    void ConcatLayer::forward(std::vector<Blob *> &inputs, std::vector<Blob> &outputs)
-    {
-        const Mat& outMat = outputs[0].matRef();
-        std::vector<Range> ranges(outputs[0].dims(), Range::all());
-        int sizeStart = 0;
-        for (size_t i = 0; i < inputs.size(); i++)
-        {
-            int sizeEnd = sizeStart + inputs[i]->size(axis);
-            ranges[axis] = Range(sizeStart, sizeEnd);
+    refShape[axisIdx] = axisSum;
+    useOpenCL &= ocl::useOpenCL();
+    int allocFlags = (useOpenCL) ? Blob::ALLOC_UMAT : Blob::ALLOC_UMAT;
 
-            Mat outSubMat = outMat(&ranges[0]);
-            inputs[i]->matRef().copyTo(outSubMat);
+    outputs.resize(1);
+    outputs[0].create(refShape, inputs[0]->type(), allocFlags);
+}
 
-            sizeStart = sizeEnd;
-        }
+
+void ConcatLayerImpl::forward(std::vector<Blob *> &inputs, std::vector<Blob> &outputs)
+{
+    #ifdef HAVE_OPENCL
+    if (useOpenCL)
+        forward_<UMat>(inputs, outputs);
+    else
+    #endif
+        forward_<Mat>(inputs, outputs);
+}
+
+template<typename XMat>
+void ConcatLayerImpl::forward_(std::vector<Blob*> &inputs, std::vector<Blob> &outputs)
+{
+    XMat& outMat = outputs[0].getRef<XMat>();
+    std::vector<Range> ranges(outputs[0].dims(), Range::all());
+
+    ranges[axisIdx].start = 0;
+    for (size_t i = 0; i < inputs.size(); i++)
+    {
+        ranges[axisIdx].end = ranges[axisIdx].start + inputs[i]->size(axisIdx);
+        inputs[i]->getRefConst<XMat>().copyTo(outMat(&ranges[0]));
+        ranges[axisIdx].start = ranges[axisIdx].end;
     }
 }
+
+Ptr<ConcatLayer> ConcatLayer::create(int axis)
+{
+    return Ptr<ConcatLayer>(new ConcatLayerImpl(axis));
+}
+
+}
 }

modules/dnn/src/layers/concat_layer.hpp

@@ -42,20 +42,29 @@
 #ifndef __OPENCV_DNN_LAYERS_CONCAT_LAYER_HPP__
 #define __OPENCV_DNN_LAYERS_CONCAT_LAYER_HPP__
 #include "../precomp.hpp"
+#include <opencv2/dnn/all_layers.hpp>
 
 namespace cv
 {
 namespace dnn
 {
-    class ConcatLayer : public Layer
-    {
-        int axis;
-
-    public:
-        ConcatLayer(LayerParams& params);
-        void allocate(const std::vector<Blob*> &inputs, std::vector<Blob> &outputs);
-        void forward(std::vector<Blob*> &inputs, std::vector<Blob> &outputs);
-    };
+
+class ConcatLayerImpl : public ConcatLayer
+{
+    bool useOpenCL;
+    int axisIdx;
+
+    template<typename XMat>
+    void forward_(std::vector<Blob*> &inputs, std::vector<Blob> &outputs);
+
+public:
+    ConcatLayerImpl(int axis_ = 1);
+
+    void allocate(const std::vector<Blob*> &inputs, std::vector<Blob> &outputs);
+
+    void forward(std::vector<Blob*> &inputs, std::vector<Blob> &outputs);
+};
+
 }
 }
 #endif

modules/dnn/src/layers/convolution_layer.cpp

@@ -82,6 +82,8 @@ void ConvolutionLayerImpl::init()
 
 void ConvolutionLayerImpl::allocate(const std::vector<Blob*> &inputs, std::vector<Blob> &outputs)
 {
+    init();
+
     CV_Assert(inputs.size() > 0);
     const Blob &input = *inputs[0];
     CV_Assert(input.dims() == 4 && (input.type() == CV_32F || input.type() == CV_64F));
@@ -331,37 +333,5 @@ Ptr<BaseConvolutionLayer> DeconvolutionLayer::create(Size kernel, Size stride, S
     return Ptr<BaseConvolutionLayer>(l);
 }
 
-//Importers
-
-template<typename CLayer>
-static void initConvDeconvLayerFromCaffe(CLayer *l, LayerParams &params)
-{
-    l->setParamsFrom(params);
-    getCaffeConvParams(params, l->kernel, l->pad, l->stride);
-
-    bool bias = params.get<bool>("bias_term", true);
-    int numOutput = params.get<int>("num_output");
-    int group = params.get<int>("group", 1);
-
-    CV_Assert(numOutput % group == 0);
-    CV_Assert((bias && l->blobs.size() == 2) || (!bias && l->blobs.size() == 1));
-}
-
-Ptr<Layer> createConvolutionLayerFromCaffe(LayerParams &params)
-{
-    ConvolutionLayerImpl *l = new ConvolutionLayerImpl();
-    initConvDeconvLayerFromCaffe(l, params);
-    l->init();
-    return Ptr<Layer>(l);
-}
-
-Ptr<Layer> createDeconvolutionLayerFromCaffe(LayerParams &params)
-{
-    ConvolutionLayerImpl *l = new DeConvolutionLayerImpl();
-    initConvDeconvLayerFromCaffe(l, params);
-    l->init();
-    return Ptr<Layer>(l);
-}
-
 }
 }

modules/dnn/src/layers/layers_common.cpp

@@ -46,45 +46,5 @@ namespace cv
 namespace dnn
 {
 
-void getCaffeConvParams(LayerParams &params, Size &kernel, Size &pad, Size &stride)
-{
-    if (params.has("kernel_h") && params.has("kernel_w"))
-    {
-        kernel.height = params.get<int>("kernel_h");
-        kernel.width = params.get<int>("kernel_w");
-    }
-    else if (params.has("kernel_size"))
-    {
-        kernel.height = kernel.width = params.get<int>("kernel_size");
-    }
-    else
-    {
-        CV_Error(Error::StsBadArg, "kernel_size (or kernel_h and kernel_w) not specified");
-    }
-    CV_Assert(kernel.height > 0 && kernel.width > 0);
-
-    if (params.has("pad_h") && params.has("pad_w"))
-    {
-        pad.height = params.get<int>("pad_h");
-        pad.width = params.get<int>("pad_w");
-    }
-    else
-    {
-        pad.height = pad.width = params.get<int>("pad", 0);
-    }
-    CV_Assert(pad.height >= 0 && pad.width >= 0);
-
-    if (params.has("stride_h") && params.has("stride_w"))
-    {
-        stride.height = params.get<int>("stride_h");
-        stride.width = params.get<int>("stride_w");
-    }
-    else
-    {
-        stride.height = stride.width = params.get<int>("stride", 1);
-    }
-    CV_Assert(stride.height > 0 && stride.width > 0);
-}
-
 }
 }

modules/dnn/src/layers/layers_common.hpp

@@ -42,14 +42,14 @@
 #ifndef __OPENCV_DNN_LAYERS_LAYERS_COMMON_HPP__
 #define __OPENCV_DNN_LAYERS_LAYERS_COMMON_HPP__
 #include <opencv2/dnn.hpp>
+#include "op_blas.hpp"
+#include "op_im2col.hpp"
 
 namespace cv
 {
 namespace dnn
 {
 
-void getCaffeConvParams(LayerParams &params, Size &kernel, Size &pad, Size &stride);
-
 }
 }
 

modules/dnn/src/layers/slice_layer.cpp

@@ -42,55 +42,57 @@
 #include "../precomp.hpp"
 #include "layers_common.hpp"
 #include "slice_layer.hpp"
+#include <opencv2/core/ocl.hpp>
+#include <opencv2/dnn/shape_utils.hpp>
 
 namespace cv
 {
 namespace dnn
 {
 
-SliceLayer::SliceLayer(LayerParams &params) : Layer(params)
+SliceLayerImpl::SliceLayerImpl(int axis_ /*= 1*/)
 {
-    inAxis = params.get<int>("axis", 1);
-
-    if (!params.has("slice_point"))
-        return;
+    axis = axis_;
+}
 
-    const DictValue &_slicePoints = params.get("slice_point");
-    slicePoints.resize(_slicePoints.size());
-    for (int i = 0; i < _slicePoints.size(); i++)
-    {
-        slicePoints[i] = _slicePoints.get<int>(i);
-        CV_Assert(slicePoints[i] > 0 && (i == 0 || slicePoints[i-1] < slicePoints[i]));
-    }
+SliceLayerImpl::SliceLayerImpl(int axis_, const std::vector<int> &sliceIndices_)
+{
+    axis = axis_;
+    sliceIndices = sliceIndices_;
 }
 
-void SliceLayer::allocate(const std::vector<Blob*> &inputs, std::vector<Blob> &outputs)
+void SliceLayerImpl::allocate(const std::vector<Blob*> &inputs, std::vector<Blob> &outputs)
 {
     CV_Assert(inputs.size() == 1);
 
-    const Blob inpBlob = *inputs[0];
-    int axis = inpBlob.canonicalAxis(inAxis);
-    int axisSize = inpBlob.size(axis);
+    const Blob &inpBlob = *inputs[0];
+    useOpenCL = ocl::useOpenCL() && inpBlob.getState() == Blob::HEAD_AT_UMAT;
+
+    axisIdx = inpBlob.canonicalAxis(axis);
+    int axisSize = inpBlob.size(axisIdx);
     BlobShape inpShape = inpBlob.shape();
+    int allocFlags = useOpenCL ? Blob::ALLOC_UMAT : Blob::ALLOC_MAT;
 
-    if (slicePoints.size()) //divide blob with respect to passed parameters
+    if (sliceIndices.size()) //divide blob with respect to passed parameters
     {
         std::vector<int> outAxisSize;
         int prevSlice = 0;
 
-        for (size_t i = 0; i < slicePoints.size(); i++)
+        for (size_t i = 0; i < sliceIndices.size(); i++)
         {
-            CV_Assert(prevSlice < slicePoints[i] && slicePoints[i] < axisSize);
-            outAxisSize.push_back(slicePoints[i] - prevSlice);
-            prevSlice = slicePoints[i];
+            if (!(prevSlice < sliceIndices[i] && sliceIndices[i] < axisSize))
+                CV_Error(Error::StsBadArg, "Slice indices should be positive, increased and don't exceed size of sliced dimension");
+
+            outAxisSize.push_back(sliceIndices[i] - prevSlice);
+            prevSlice = sliceIndices[i];
         }
         outAxisSize.push_back(axisSize - prevSlice);
 
         outputs.resize(outAxisSize.size());
         for (size_t i = 0; i < outAxisSize.size(); i++)
         {
-            inpShape[axis] = outAxisSize[i];
-            outputs[i].create(inpShape, inpBlob.type());
+            inpShape[axisIdx] = outAxisSize[i];
+            outputs[i].create(inpShape, inpBlob.type(), allocFlags);
         }
     }
     else //divide blob with respect to count of output blobs
@@ -100,30 +102,45 @@ void SliceLayer::allocate(const std::vector<Blob*> &inputs, std::vector<Blob> &o
 
         for (size_t i = 0; i < outputs.size(); i++)
         {
-            inpShape[axis] = outAxisSize;
-            outputs[i].create(inpShape, inpBlob.type());
+            inpShape[axisIdx] = outAxisSize;
+            outputs[i].create(inpShape, inpBlob.type(), allocFlags);
         }
     }
 }
 
-void SliceLayer::forward(std::vector<Blob*> &inputs, std::vector<Blob> &outputs)
+void SliceLayerImpl::forward(std::vector<Blob*> &inputs, std::vector<Blob> &outputs)
+{
+    #ifdef HAVE_OPENCL
+    if (useOpenCL)
+        forward_<UMat>(inputs, outputs);
+    else
+    #endif
+        forward_<Mat>(inputs, outputs);
+}
+
+template<typename XMat>
+void SliceLayerImpl::forward_(std::vector<Blob*> &inputs, std::vector<Blob> &outputs)
 {
-    Blob &inpBlob = *inputs[0];
-    const int axis = inpBlob.canonicalAxis(inAxis);
-    const Mat& inpMat = inpBlob.matRef();
+    const XMat& inpMat = inputs[0]->getRefConst<XMat>();
+    std::vector<Range> ranges(inputs[0]->dims(), Range::all());
 
-    std::vector<Range> ranges(inpBlob.dims(), Range::all());
-    int sizeStart = 0;
+    ranges[axisIdx].start = 0;
     for (size_t i = 0; i < outputs.size(); i++)
     {
-        int sizeEnd = sizeStart + outputs[i].size(axis);
-        ranges[axis] = Range(sizeStart, sizeEnd);
+        ranges[axisIdx].end = ranges[axisIdx].start + outputs[i].size(axisIdx);
+        inpMat(&ranges[0]).copyTo(outputs[i].getRef<XMat>());
+        ranges[axisIdx].start = ranges[axisIdx].end;
+    }
+}
 
-        Mat inpSubMat = inpMat(&ranges[0]);
-        inpSubMat.copyTo(outputs[i].matRef());
+Ptr<SliceLayer> SliceLayer::create(int axis)
+{
+    return Ptr<SliceLayer>(new SliceLayerImpl(axis));
+}
 
-        sizeStart = sizeEnd;
-    }
+Ptr<SliceLayer> SliceLayer::create(int axis, const std::vector<int> &sliceIndices)
+{
+    return Ptr<SliceLayer>(new SliceLayerImpl(axis, sliceIndices));
 }
 
 }

modules/dnn/src/layers/slice_layer.hpp

@@ -42,24 +42,28 @@
 #ifndef __OPENCV_DNN_LAYERS_SLICE_LAYER_HPP__
 #define __OPENCV_DNN_LAYERS_SLICE_LAYER_HPP__
 #include "../precomp.hpp"
+#include <opencv2/dnn/all_layers.hpp>
 
 namespace cv
 {
 namespace dnn
 {
 
-class SliceLayer : public Layer
+class SliceLayerImpl : public SliceLayer
 {
+    bool useOpenCL;
+    int axisIdx;
+
+    template<typename XMat>
+    void forward_(std::vector<Blob*> &inputs, std::vector<Blob> &outputs);
+
 public:
-    SliceLayer(LayerParams &params);
+    SliceLayerImpl(int axis_ = 1);
+    SliceLayerImpl(int axis_, const std::vector<int> &sliceIndices_);
 
     void allocate(const std::vector<Blob*> &inputs, std::vector<Blob> &outputs);
 
     void forward(std::vector<Blob*> &inputs, std::vector<Blob> &outputs);
-
-private:
-    int inAxis;
-    std::vector<int> slicePoints;
 };
 
 }

modules/dnn/src/layers/split_layer.cpp

@@ -42,41 +42,46 @@
 #include "../precomp.hpp"
 #include "layers_common.hpp"
 #include "split_layer.hpp"
+#include <opencv2/core/ocl.hpp>
 
 namespace cv
 {
 namespace dnn
 {
 
-//TODO: maybe "top_count" param is useless because it can be determined by output connections number?
-SplitLayer::SplitLayer(LayerParams &params) : Layer(params)
+SplitLayerImpl::SplitLayerImpl(int outputsCount_ /*= -1*/)
 {
-    if (params.has("top_count"))
-    {
-        outputsNum = params.get<int>("top_count");
-        CV_Assert(outputsNum >= 0);
-    }
-    else
-    {
-        outputsNum = -1;
-    }
+    outputsCount = outputsCount_;
 }
 
-void SplitLayer::allocate(const std::vector<Blob*> &inputs, std::vector<Blob> &outputs)
+void SplitLayerImpl::allocate(const std::vector<Blob*> &inputs, std::vector<Blob> &outputs)
 {
     CV_Assert(inputs.size() == 1);
+    useOpenCL = ocl::useOpenCL() && inputs[0]->getState() == Blob::HEAD_AT_UMAT;
+    int allocFlags = useOpenCL ? Blob::ALLOC_UMAT : Blob::ALLOC_UMAT;
 
-    if (outputsNum >= 0)
-        outputs.resize(outputsNum);
+    if (outputsCount >= 0)
+        outputs.resize(outputsCount);
 
     for (size_t i = 0; i < outputs.size(); i++)
-        outputs[i].create(inputs[0]->shape(), inputs[0]->type());
+        outputs[i].create(inputs[0]->shape(), inputs[0]->type(), allocFlags);
 }
 
-void SplitLayer::forward(std::vector<Blob*> &inputs, std::vector<Blob> &outputs)
+void SplitLayerImpl::forward(std::vector<Blob*> &inputs, std::vector<Blob> &outputs)
 {
     for (size_t i = 0; i < outputs.size(); i++)
-        inputs[0]->matRefConst().copyTo(outputs[i].matRef());
+    {
+        if (useOpenCL)
+            inputs[0]->umatRefConst().copyTo(outputs[i].umatRef());
+        else
+            inputs[0]->matRefConst().copyTo(outputs[i].matRef());
+    }
+}
+
+
+Ptr<SplitLayer> SplitLayer::create(int outputsCount)
+{
+    return Ptr<SplitLayer>(new SplitLayerImpl(outputsCount));
 }
 
 }

modules/dnn/src/layers/split_layer.hpp

@@ -42,23 +42,23 @@
 #ifndef __OPENCV_DNN_LAYERS_SPLIT_LAYER_HPP__
 #define __OPENCV_DNN_LAYERS_SPLIT_LAYER_HPP__
 #include "../precomp.hpp"
+#include <opencv2/dnn/all_layers.hpp>
 
 namespace cv
 {
 namespace dnn
 {
 
-class SplitLayer : public Layer
+class SplitLayerImpl : public SplitLayer
 {
+    bool useOpenCL;
+
 public:
-    SplitLayer(LayerParams &params);
+    SplitLayerImpl(int outputsCount_ = -1);
 
     void allocate(const std::vector<Blob*> &inputs, std::vector<Blob> &outputs);
 
     void forward(std::vector<Blob*> &inputs, std::vector<Blob> &outputs);
-
-private:
-    int outputsNum;
 };
 
 }

modules/dnn/src/opencl/activations.cl

@@ -5,7 +5,7 @@ __kernel void ReLUForward(const int count, __global const T* in, __global T* out
 ) {
   int index = get_global_id(0);
   if(index < count)
-#ifndef RELU_NO_SLOPE  
+#ifndef RELU_NO_SLOPE
   out[index] = in[index] > 0 ? in[index] : in[index] * negative_slope;
 #else
   out[index] = in[index] > 0 ? in[index] : 0;
@@ -34,7 +34,7 @@ __kernel void BNLLForward(const int n, __global const T* in, __global T* out) {
 __kernel void AbsValForward(const int n, __global const T* in, __global T* out) {
   int index = get_global_id(0);
   if (index < n)
-    out[index] = abs(in[index]);
+    out[index] = fabs(in[index]);
 }
 
 __kernel void PowForward(const int n, __global const T* in, __global T* out, const T power, const T scale, const T shift) {

modules/dnn/test/test_layers.cpp

@@ -58,6 +58,31 @@ static String _tf(TString filename)
     return (getOpenCVExtraDir() + "/dnn/layers/") + filename;
 }
 
+
+enum RunLayerMode
+{
+    ALLOC_ONLY = 1,
+    FORWARD_ONLY = 2,
+    ALLOC_AND_FORWARD = ALLOC_ONLY | FORWARD_ONLY
+};
+
+typedef Ptr<std::vector<Blob*> > PtrToVecPtrBlob;
+
+PtrToVecPtrBlob
+runLayer(Ptr<Layer> layer, std::vector<Blob> &inpBlobs, std::vector<Blob> &outBlobs, int mode = ALLOC_AND_FORWARD)
+{
+    PtrToVecPtrBlob inpPtrs(new std::vector<Blob*>());
+    inpPtrs->reserve(inpBlobs.size());
+    for (size_t i = 0; i < inpBlobs.size(); i++)
+        inpPtrs->push_back(&inpBlobs[i]);
+
+    if (mode & ALLOC_ONLY) layer->allocate(*inpPtrs, outBlobs);
+    if (mode & FORWARD_ONLY) layer->forward(*inpPtrs, outBlobs);
+
+    return inpPtrs;
+}
+
+
 void testLayerUsingCaffeModels(String basename, bool useCaffeModel = false, bool useCommonInputBlob = true)
 {
     String prototxt = _tf(basename + ".prototxt");
@@ -137,7 +162,12 @@ OCL_TEST(Layer_Test_DeConvolution, Accuracy)
 
 TEST(Layer_Test_InnerProduct, Accuracy)
 {
-     testLayerUsingCaffeModels("layer_inner_product", true);
+     OCL_OFF(testLayerUsingCaffeModels("layer_inner_product", true));
+}
+OCL_TEST(Layer_Test_InnerProduct, Accuracy)
+{
+    OCL_ON(testLayerUsingCaffeModels("layer_inner_product", true));
+    OCL_OFF();
 }
 
 TEST(Layer_Test_Pooling_max, Accuracy)
@@ -164,7 +194,7 @@ OCL_TEST(Layer_Test_Pooling_ave, Accuracy)
 
 TEST(Layer_Test_MVN, Accuracy)
 {
-     testLayerUsingCaffeModels("layer_mvn");
+     OCL_OFF(testLayerUsingCaffeModels("layer_mvn"));
 }
 
 TEST(Layer_Test_Reshape, squeeze)
@@ -184,7 +214,28 @@ TEST(Layer_Test_Reshape, squeeze)
     EXPECT_EQ(outVec[0].shape(), BlobShape(4, 3, 2));
 }
 
-TEST(Layer_Test_Reshape_Split_Slice, Accuracy)
+template<typename XMat>
+static void test_Layer_Concat()
+{
+    Matx21f a(1.f, 1.f), b(2.f, 2.f), c(3.f, 3.f);
+    std::vector<Blob> res(1), src = { Blob(XMat(a)), Blob(XMat(b)), Blob(XMat(c)) };
+    Blob ref(XMat(Matx23f(1.f, 2.f, 3.f, 1.f, 2.f, 3.f)));
+
+    runLayer(ConcatLayer::create(1), src, res);
+    normAssert(ref, res[0]);
+}
+TEST(Layer_Concat, Accuracy)
+{
+    OCL_OFF(test_Layer_Concat<Mat>());
+}
+OCL_TEST(Layer_Concat, Accuracy)
+{
+    OCL_ON(test_Layer_Concat<Mat>());
+    OCL_OFF();
+}
+
+template<typename XMat>
+void test_Reshape_Split_Slice_layers()
 {
     Net net;
     {
@@ -193,9 +244,9 @@ TEST(Layer_Test_Reshape_Split_Slice, Accuracy)
         importer->populateNet(net);
     }
 
-    Blob input(BlobShape(Vec2i(6, 12)));
+    Blob input(BlobShape(6, 12));
     RNG rng(0);
-    rng.fill(input.matRef(), RNG::UNIFORM, -1, 1);
+    rng.fill(input.getRef<XMat>(), RNG::UNIFORM, -1, 1);
 
     net.setBlob(".input", input);
     net.forward();
@@ -203,28 +254,14 @@ TEST(Layer_Test_Reshape_Split_Slice, Accuracy)
 
     normAssert(input, output);
 }
-
-enum RunLayerMode
+TEST(Layer_Test_Reshape_Split_Slice, Accuracy)
 {
-    ALLOC_ONLY          = 1,
-    FORWARD_ONLY        = 2,
-    ALLOC_AND_FORWARD   = ALLOC_ONLY | FORWARD_ONLY
-};
-
-typedef Ptr<std::vector<Blob*> > PtrToVecPtrBlob;
-
-PtrToVecPtrBlob
-runLayer(Ptr<Layer> layer, std::vector<Blob> &inpBlobs, std::vector<Blob> &outBlobs, int mode=ALLOC_AND_FORWARD)
+    OCL_OFF(test_Reshape_Split_Slice_layers<Mat>());
+}
+OCL_TEST(Layer_Test_Reshape_Split_Slice, Accuracy)
 {
-    PtrToVecPtrBlob inpPtrs( new std::vector<Blob*>() );
-    inpPtrs->reserve(inpBlobs.size());
-    for (size_t i = 0; i < inpBlobs.size(); i++)
-        inpPtrs->push_back(&inpBlobs[i]);
-
-    if (mode & ALLOC_ONLY) layer->allocate(*inpPtrs, outBlobs);
-    if (mode & FORWARD_ONLY) layer->forward(*inpPtrs, outBlobs);
-
-    return inpPtrs;
+    OCL_ON(test_Reshape_Split_Slice_layers<UMat>());
+    OCL_OFF();
 }
 
 class Layer_LSTM_Test : public ::testing::Test