[clustering] ISODATA clustering Algorithm / Mumford-shah image segmentation

[joeyklee]

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I am submitting am issue about...

Hi!

I've been thinking about more clustering algorithms we might be interested to integrate I'd love to try to add some clustering algorithms commonly used in the GIS/Remote sensing world that might also be used in other creative contexts for "fast-ish" image segmentation in the browser with tfjs.

• ISODATA Clustering Algorithm: https://www.cs.umd.edu/~mount/Projects/ISODATA/
• The Mumford–Shah variational model for image segmentation: https://www.sciencedirect.com/science/article/abs/pii/S092427161200041X

related to: #28 and #563

Also related would be to add functionality for supervised classification/segmentation: https://gisgeography.com/supervised-unsupervised-classification-arcgis/