fix bug #3562:

add missing __syncthreads to edgesHysteresisLocalKernel

fix bug #3562:
add missing __syncthreads to edgesHysteresisLocalKernel
7fd21d21 · Vladislav Vinogradov · ce42593f · 7fd21d21
Commit 7fd21d21 authored Feb 20, 2014 by Vladislav Vinogradov
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canny.cu modules/gpu/src/cuda/canny.cu +4 -0

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--- a/modules/gpu/src/cuda/canny.cu
+++ b/modules/gpu/src/cuda/canny.cu
@@ -293,8 +293,12 @@ namespace canny
                n += smem[threadIdx.y + 2][threadIdx.x + 2] == 2;
            }

+            __syncthreads();
+
            if (n > 0)
                smem[threadIdx.y + 1][threadIdx.x + 1] = 2;
+
+            __syncthreads();
        }

        const int e = smem[threadIdx.y + 1][threadIdx.x + 1];