How to recognizing money bills in Images?

Question

I\'m having some images, of euro money bills. The bills are completely within the image and are mostly flat (e.g. little deformation) and perspective skew is small (e.g. ima

Answer 1

There is a good book on openCV

Using a Hough transform to find the rectangular bill shape (and angle) and then find rectangles/circles within it should be quick and easy

For more complex searching, something like a Haar classifier - if you needed to find odd corners of bills in an image?