I'm working on a program to aligning images containing a scanned document (align with the original document) by applying affine transformation based on 3 points of FP (Finding Pattern)(exactly like FP in QR Code). I'm trying to find the coordinate of the FP pattern in an image. In the picture, there are 3 FPs located at each near the corner of the image. This FP has a pattern like FP in QR Code with a ratio of 1:1:3:1:1. The image of the document may be rotated or of a different size, so it is possible that the pattern ratio is not exactly 1:1:3:1:1. So I have to use a tolerance value for that.
I've tried with a template matching approach, described here, but I didn't get any results. (the form of the document that I mean is also explained there)
I've tried using np.where, but that can't be done for pattern search in the form of ratios. Are there any suggestions or solutions for this?
