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opencv
Commit f094983d authored by Marina Kolpakova's avatar Marina Kolpakova
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reduced the number of registers used in the LBP responce operator

parent 09269b4c
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Showing with 60 additions and 46 deletions
modules/gpu/src/opencv2/gpu/device/lbp.hpp
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......@@ -163,52 +163,66 @@ __device__ __forceinline__ T __atomicMin(T* address, T val)
__device__ __forceinline__ int operator() (unsigned int y, unsigned int x, uchar4 feature, const DevMem2Di integral) const
{
int x_off = 2 * feature.z;
int y_off = 2 * feature.w;
feature.z += feature.x;
feature.w += feature.y;
// load feature key points
int anchors[16];
/*
P0-----P1-----P2-----P3
| | | |
P4-----P5-----P6-----P7
| | | |
P8-----P9-----P10----P11
| | | |
P12----P13----P14----15
*/
anchors[0] = integral(y + feature.y, x + feature.x);
anchors[1] = integral(y + feature.y, x + feature.z);
anchors[2] = integral(y + feature.y, x + feature.x + x_off);
anchors[3] = integral(y + feature.y, x + feature.z + x_off);
anchors[4] = integral(y + feature.w, x + feature.x);
anchors[5] = integral(y + feature.w, x + feature.z);
anchors[6] = integral(y + feature.w, x + feature.x + x_off);
anchors[7] = integral(y + feature.w, x + feature.z + x_off);
anchors[8] = integral(y + y_off + feature.y, x + feature.x);
anchors[9] = integral(y + y_off + feature.y, x + feature.z);
anchors[10] = integral(y + y_off + feature.y, x + x_off + feature.x);
anchors[11] = integral(y + y_off + feature.y, x + x_off + feature.z);
anchors[12] = integral(y + y_off + feature.w, x + feature.x);
anchors[13] = integral(y + y_off + feature.w, x + feature.z);
anchors[14] = integral(y + y_off + feature.w, x + x_off + feature.x);
anchors[15] = integral(y + y_off + feature.w, x + x_off + feature.z);
// calculate responce
int sum = anchors[5] - anchors[6] - anchors[9] + anchors[10];
int response = (( (anchors[ 0] - anchors[ 1] - anchors[ 4] + anchors[ 5]) >= sum )? 128 : 0)
|(( (anchors[ 1] - anchors[ 2] - anchors[ 5] + anchors[ 6]) >= sum )? 64 : 0)
|(( (anchors[ 2] - anchors[ 3] - anchors[ 6] + anchors[ 7]) >= sum )? 32 : 0)
|(( (anchors[ 6] - anchors[ 7] - anchors[10] + anchors[11]) >= sum )? 16 : 0)
|(( (anchors[10] - anchors[11] - anchors[14] + anchors[15]) >= sum )? 8 : 0)
|(( (anchors[ 9] - anchors[10] - anchors[13] + anchors[14]) >= sum )? 4 : 0)
|(( (anchors[ 8] - anchors[ 9] - anchors[12] + anchors[13]) >= sum )? 2 : 0)
|(( (anchors[ 4] - anchors[ 5] - anchors[ 8] + anchors[ 9]) >= sum )? 1 : 0);
int anchors[9];// = {0,0,0, 0,0,0, 0,0,0};
x +=feature.x;
y +=feature.y;
anchors[0] = integral(y, x);
anchors[1] = integral(y, x + feature.z);
anchors[0] -= anchors[1];
anchors[2] = integral(y, x + x_off);
anchors[1] -= anchors[2];
anchors[2] -= integral(y, x + feature.z + x_off);
y+=feature.w;
anchors[3] = integral(y, x);
anchors[4] = integral(y, x + feature.z);
anchors[3] -= anchors[4];
anchors[5] = integral(y, x + x_off);
anchors[4] -= anchors[5];
anchors[5] -= integral(y, x + feature.z + x_off);
anchors[0] -= anchors[3];
anchors[1] -= anchors[4];
anchors[2] -= anchors[5];
// 0 - 2 contains s0 - s2
y+=feature.w;
anchors[6] = integral(y, x);
anchors[7] = integral(y, x + feature.z);
anchors[6] -= anchors[7];
anchors[8] = integral(y, x + x_off);
anchors[7] -= anchors[8];
anchors[8] -= integral(y, x + x_off + feature.z);
anchors[3] -= anchors[6];
anchors[4] -= anchors[7];
anchors[5] -= anchors[8];
// 3 - 5 contains s3 - s5
int response = ((1 - ((unsigned int)(anchors[0] - anchors[4]) >> 31)) << 7);
response |= ((1 - ((unsigned int)(anchors[1] - anchors[4]) >> 31)) << 6);
response |= ((1 - ((unsigned int)(anchors[2] - anchors[4]) >> 31)) << 5);
response |= ((1 - ((unsigned int)(anchors[5] - anchors[4]) >> 31)) << 4);
response |= ((1 - ((unsigned int)(anchors[3] - anchors[4]) >> 31)) << 0);
y+=feature.w;
anchors[0] = integral(y, x);
anchors[1] = integral(y, x + feature.z);
anchors[0] -= anchors[1];
anchors[2] = integral(y, x + x_off);
anchors[1] -= anchors[2];
anchors[2] -= integral(y, x + x_off + feature.z);
anchors[6] -= anchors[0];
anchors[7] -= anchors[1];
anchors[8] -= anchors[2];
// 0 -2 contains s6 - s8
response |= ((1 - ((unsigned int)(anchors[6] - anchors[4]) >> 31)) << 1);
response |= ((1 - ((unsigned int)(anchors[7] - anchors[4]) >> 31)) << 2);
response |= ((1 - ((unsigned int)(anchors[8] - anchors[4]) >> 31)) << 3);
return response;
}
};
......
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