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I need to process the scanned images with php and crop a portion thereof which is located within a rectangle already drawn.
The rectangle is red, but since it is a scanned image, is difficult to define the hue. Unfortunately I do not know the library “gd2image” that well. Someone has already faced the same problem and wants to help me? Thanks in advance.
This problem is untrivial. I would study Opticrop as it already does what you wanted, only better 🙂