AnsweredAssumed Answered

How to use Vivante for face recognition on imx6q Saber Lite board?

Question asked by Ivan Skl on Apr 13, 2018
Latest reply on Apr 24, 2018 by Jas Math

I want to use OpenCL for face recognition enhancement.

I am using code OpenCV-2.x from OpenCV documentation:

 

VideoCapture vcap(...);
ocl::OclCascadeClassifier fd("haar_ff.xml");
ocl::oclMat frame, frameGray;
Mat frameCpu;
vector<Rect> faces;
for(;;){
// processing loop
vcap >> frameCpu;
frame = frameCpu;
ocl::cvtColor(frame, frameGray, BGR2GRAY);
ocl::equalizeHist(frameGray, frameGray);
fd.detectMultiScale(frameGray, faces, ...);
// draw rectangles
// show image


That code compiles well, but program don't work with error:

 

OpenCV Error: Assertion failed (localThreads[0] * localThreads[1] * localThreads[2] <= kernelWorkGroupSize) in openCLVerifyKernel,
file /root/Downloads/opencv-2.4.9/modules/ocl/src/cl_operations.cpp, line 349
terminate called after throwing an instance of 'cv::Exception'
what(): /root/Downloads/opencv-2.4.9/modules/ocl/src/cl_operations.cpp:349:
error: (-215) localThreads[0] * localThreads[1] * localThreads[2] <= kernelWorkGroupSize in function openCLVerifyKernel

 

My board is imx6q Saber Lite with Ubuntu Xenial for i.MX6/7 boards  August 2016 (kernel 4.1.15) image.

 

I can't find how to resolve this problem. And if it's not possible at all to use OpenCL, there is a question: how can I speed up a face recognition on imx6q Saber Lite?

Outcomes