Crop image after stitching

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Dose this help you? Especially warper_creator, line 592

Also check out the answer here might be helpful.

thanks, but it not helps. I don't need to do transformation, i need to select the right corners to crop the image without any black area left.

Have you tried:

• to detect the mask of the image (using threshold with threshold 0, using the largest contour and fill it if there are black area inside the image)
• detect all the corners in the mask (maybe using Harris corners).
• search the lower corner in the top half (largest y that is not larger than half of the image)
• search the higher corner in the bottom half (smallest y that is not smaller than half of the image)
• do the same with left and right halfs and corners.

I suppose this should do it ;)