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setUseOpenCL

asked 2015-10-13 09:40:08 -0500

cannon_dt gravatar image

Hi, When I tried a simple face detection code in Java I ran into the foll for some images only: OpenCV Error: Assertion failed (retval == CL_SUCCESS) in cv::ocl::OpenCLBufferPoolImpl::_allocateBufferEntry, file C:\builds\master_PackSlaveAddon-win64-vc12-static\opencv\modules\core\src\ocl.cpp, line 3990 OpenCV Error: Assertion failed (u != 0) in cv::UMat::create, file C:\builds\master_PackSlaveAddon-win64-vc12-static\opencv\modules\core\src\umatrix.cpp, line 274

I dont know why this was happening?

Upon doing some research I found that I have to setUseOpenCL to false to overcome this. However I am unable to locate where this API is defined? Can someone please help?

Thanks, Ananth

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What if we dont want to set OPENCL to OFF?

thefakhir gravatar imagethefakhir ( 2017-05-24 06:23:57 -0500 )edit

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answered 2015-10-13 19:35:13 -0500

To disable the usage of OpenCL just include the header file opencv2\core\ocl.hpp and put cv::ocl::setUseOpenCL(false) somewhere at the beginning of your program.The implementation of setUseOpenCL function is in the source code file modules/core/src/ocl.cpp.

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I cannot find this as a Java API, the Core class does not have it (I am developing this using Eclipse/openCV 3.0)

cannon_dt gravatar imagecannon_dt ( 2015-10-13 22:37:04 -0500 )edit

I have little experience with Java: rebuild OpenCV with WITH_OPENCL set to OFF.

tuannhtn gravatar imagetuannhtn ( 2015-10-14 01:12:34 -0500 )edit

Thank you. I did that and it works ok now.

cannon_dt gravatar imagecannon_dt ( 2015-10-14 08:14:26 -0500 )edit

Then, accept the answer as a solution to help others to recognize your question as being solved.

tuannhtn gravatar imagetuannhtn ( 2015-10-14 09:54:21 -0500 )edit
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Asked: 2015-10-13 09:40:08 -0500

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Last updated: Oct 13 '15