Answer by Maximilian Matthé for Improving Canny Edge Detection and Contours...
You might try a Hough Transform after your canny-Detection instead of contour detection. (Given that you dont have too much perspective distortion, i.e. the cards are rectangular and not trapezoidal)....
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Improving Canny Edge Detection and Contours Image Segmentation
I am working on an image segmentation project to identify playing cards on varying backgrounds. For my use case I care most that I accurately extract all the cards in the image; false-positives are...
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