Analyse a graph image and generate percentage match.

I want you to create software that 1) Receive a PNG image via HTTP post request. 2) Compair received PNG image with existing 2 samples of png image graphs (+ graph and -ve graph). 3) Generate a http response in Json. Example {"Positive", "60"} - Positive is matched graph and 60 is percentage match with positive graph. Samples (282), positive and negitive image graphs for testing are attached, please verify. Any server side languages that could run on linux will do the job . ex PHP, Python, node js etc...