MaximumLocalError

After you've accounted for color tolerance changes, you now need to control for local acceptable error. Which depending on how pixels were colored on triangle edges may be a few percent of the image being outside the tolerance levels. Unlike the MaximumGlobalError, the MaximumLocalError works by focusing on a smaller subset of the image. These chunks will have be compared to the local error, in an attempt to locate hot spots of change that are important, that would be ignored by the global error.