Optimize ocl function pyrDown

e49d148d · vbystricky · 1f0ca00d · e49d148d · e49d148d
Commit e49d148d authored Jul 25, 2014 by vbystricky
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pyr_down.cl modules/imgproc/src/opencl/pyr_down.cl +0 -0

pyramids.cpp modules/imgproc/src/pyramids.cpp +1 -1

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--- a/modules/imgproc/src/opencl/pyr_down.cl
+++ b/modules/imgproc/src/opencl/pyr_down.cl
--- a/modules/imgproc/src/pyramids.cpp
+++ b/modules/imgproc/src/pyramids.cpp
@@ -445,7 +445,7 @@ static bool ocl_pyrDown( InputArray _src, OutputArray _dst, const Size& _dsz, in
    k.args(ocl::KernelArg::ReadOnly(src), ocl::KernelArg::WriteOnly(dst));

    size_t localThreads[2]  = { local_size/kercn, 1 };
-    size_t globalThreads[2] = { (src.cols + (kercn-1))/kercn, dst.rows };
+    size_t globalThreads[2] = { (src.cols + (kercn-1))/kercn, (dst.rows + 1) / 2 };
    return k.run(2, globalThreads, localThreads, false);
 }