It works well on small areas (here at the Plot level) and only with two types in the image that have significant color differences. File.
I added a loop to minimize the effect of the non-Rgeion of Interest on the binzrization process. 2nd. 3rd.
The conditions for applying the binary process are quite stringent. It's important to ensure that the image to be processed contains fairly typical features of the terrain colors and in appropriate quantities. Only then is it the right image to use, as this minimizes the area of invalid regions. 4th.
The calculation process completely excludes the background area. 5th.
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