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Implementing Magic Wand for HTML5 <canvas>?

Can someone give directions on how to implement a magic wand tool for cropping images (w / tolerance) using an element?

The idea is to give the user the ability to crop the background of the image based on the color values ​​provided with a certain number of files.

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It will be very similar to Flood fill . If you decide to implement one of the related algorithms, you should use a non-recursive queue based on JavaScript, as it is not very good for recursive calls. I did not implement Flood filling myself, but it is very similar to Magic Wand.

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Source: https://habr.com/ru/post/1386756/

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