Full body matching

edit

Hi!

We need to match people in different pictures taken by different cameras. The issue is that those images are not of the face, they are from the full body with not a lot of resolution. We need somekind of full body feature extractor. Maybe simplifying the body to a little vector of colors (shoe, trousers, shirt, face, hair, weight/height proportion...).

I am new to opencv and this kind of image processing, only know about CNNs. Can you recommend me where to start? Which opencv features to use?

Thanks