Well then it's time to do some useful stuff with the raspberry Pi, let's install opencv on it and try to show picture.
FileStorage module (YML)
One of the most useful things OpenCV has is YML file library. I canno't believe have easy to use they are. Before I learned this, I was making complicated algorithms and writing array of data like detected keypoints or descriptrs in "txt" file. But there is much simpler solution...
Complete guide using SURF feature detector
Basically one of the most interesting built in algorithms in OpenCV are feature detectors. In this tutorial I will cover only SURF algorithm, but be aware SURF and SIFT algorithm is not free, and shouldn't be used for commercial purposes only educational. Hopefully you will be able to modify the codefor other feature detectors as well (the free ones), like ORB, FAST, MSER, STAR, BRIEF etc.