Hi, I installed opencv 2.4.10 in ubuntu 15.04.
I compiled matching_to_many_images.cpp, but it returned descriptorMatcher.empty() after calling descriptorMatcher = DescriptorMatcher::create( matcherType );
I googled it and it seemed to be related to nonfree module. When I compiled opencv 2.4.10, I enabled BUILD_opencv_nonfree. Also there is /usr/local/lib/libopencv_nonfree.so.
Any help will be welcome.