graphics - How does Photoshop's magnetic lasso work? -


seems gimp's intelligent scissor based on paper siggraph '95 on "intelligent scissors image composition", seen in 1 of comments in source.

however magnetic lasso in photoshop differs lot, while gimp's tool gives users option click vertices of desired figure , approximates along edges found in image, photoshop's magnetic lasso on other hand, gives users way run freehand , gives between computerized approximation , user desired draw.

looking @ behavior quite obvious magnetic lasso style selection quite cool selection in touch based interfaces. pointers on how magnetic lasso differs gimp's tool? specific papers/algorithms into?

one algorithm can marching squares.


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