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Implementation of 'Difference of Gaussians' in OpenCV

For a Project I am trying to extract pretty dim contours from an Image. While playing around with GIMP I found a way to extract and threshold those contours beautifully using "Difference of Gaussians" ...
Schnickster's user avatar
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Energy/cost for magnetic lasso

The GIMP's implementation for magnetic lasso (found here in function calculate_link()) seems to be only using the image gradient magnitude and direction but not the laplacian zero-crossing as in the ...
arennuit's user avatar
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