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Merge pull request #8000 from mshabunin:fix-opencl-clahe

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Alexander Alekhin 2017-01-16 10:01:59 +00:00
commit 5b363df2ae
1 changed files with 2 additions and 10 deletions
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12
modules/imgproc/src/opencl/clahe.cl
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@ -186,21 +186,13 @@ __kernel void calcLut(__global __const uchar * src, const int srcStep,
#else
clipped = smem[0];
#endif
// broadcast evaluated value
__local int totalClipped;
if (tid == 0)
totalClipped = clipped;
barrier(CLK_LOCAL_MEM_FENCE);
// redistribute clipped samples evenly
int redistBatch = totalClipped / 256;
int redistBatch = clipped / 256;
tHistVal += redistBatch;
int residual = totalClipped - redistBatch * 256;
int residual = clipped - redistBatch * 256;
int rStep = 256 / residual;
if (rStep < 1)
rStep = 1;