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Iceberg is born

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This example is about ice cracking (thanks to Nikolay Makarenko for the idea). The two images of the same area are analyzed with Pixcavator with settings 596-63.

Satellite image: water dark, ice white. First image: the piece of ice isn't quite separated. Second: the separation is complete, captured with green contour

An iceberg is born!

That's what may be called a "topological event".

Other image analysis examples