Multithreading MatchTemplate

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To my great surprise MatchTemplate seemingly contains no support for any kind of multithreading. With simple slicing (making 5 parts out of a single image with overlap equal or greater than the search image) time spent per image sometimes straight out halfed, even though 25% more area had to be searched. Is there any way to make a multithreaded matching? Going by the description of the algorithm "The function slides through image" this seems like an absolutely perfect example of an algorithm being threadable.

Regards, Justus