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ocl: fix Canny for Intel devices

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There is an issue with processing of abs(short) function for
negative argument.

Affected OpenCL devices:
- iGPU: Intel(R) HD Graphics 520 (OpenCL 2.0 )
- CPU: Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz (OpenCL 2.0 (Build 10094))
This commit is contained in:
Alexander Alekhin
2016-08-09 12:48:06 +03:00
parent 5f30a0a076
commit b8e08d5d3c
1 changed files with 1 additions and 1 deletions
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modules/imgproc/src/opencl/canny.cl
+1 -1
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@@ -260,7 +260,7 @@ __kernel void stage1_with_sobel(__global const uchar *src, int src_step, int src
#ifdef L2GRAD
#define dist(x, y) ((int)(x) * (x) + (int)(y) * (y))
#else
#define dist(x, y) (abs(x) + abs(y))
#define dist(x, y) (abs((int)(x)) + abs((int)(y)))
#endif
__constant int prev[4][2] = {