Open Source Computer Vision Library https://opencv.org/

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opencv/modules/imgproc

History

Zhigang Gong 0b08d2559e fix potential race condition in canny.cl. ... See the below code snippet: while(l_counter != 0) { int mod = l_counter % LOCAL_TOTAL; int pix_per_thr = l_counter / LOCAL_TOTAL + ((lid < mod) ? 1 : 0); for (int i = 0; i < pix_per_thr; ++i) { int index = atomic_dec(&l_counter) - 1; .... } .... barrier(CLK_LOCAL_MEM_FENCE); } If we don't put a barrier before the for loop, then there is a possiblity that some work item enter this loop but the others are not, the the l_counter will be reduced in the for loop and may be changed to zero, and the other work items may can't enter the while loop. If this happens, it breaks the barrier's rule which requires all the work items reach the same barrier. And it may hang the GPU depends on the implementation of opencl platform. This issue is raised at: https://github.com/Itseez/opencv/issues/5175 Signed-off-by: Zhigang Gong <zhigang.gong@linux.intel.com>		9 years ago
..
doc	Added Subdiv2D class documentation	9 years ago
include/opencv2	Added separate hal::SepFilter2D class	9 years ago
misc/java	Simple Moments class for Java	9 years ago
perf	Visual Studio 2015 warning and test fixes	10 years ago
src	fix potential race condition in canny.cl.	9 years ago
test	fix logPolar/linearPolar	9 years ago
CMakeLists.txt	Python support	10 years ago