How to use opencv4android speed up

Question

Now I use the opencv4android, use the method "cv::resize" take too long, about more than 200 millisecond, how can i speed up.

I google for all time, it seem that use "ocl",

but when i use it , it will error when run the application , the exception is follow this：

08-11 11:43:07.140: E/cv::error()(18198): OpenCV Error: Unknown error code -6 (OpenCL function is not available: [clGetPlatformIDs]) in void* opencl_check_fn(int), file /hdd2/buildbot/slaves/slave_ardbeg1/50-SDK/opencv/modules/ocl/src/cl_runtime/cl_runtime.cpp, line 83 08-11 11:43:07.140: E/cv::error()(18198): OpenCV Error: Unknown error code -221 (OpenCL not available) in static cv::ocl::ContextImpl* cv::ocl::ContextImpl::getContext(), file /hdd2/buildbot/slaves/slave_ardbeg1/50-SDK/opencv/modules/ocl/src/cl_context.cpp, line 678

please help me

Answer 1

you can use JNI code for more effective efficient result. use this link for more information https://github.com/joaopedronardari