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Use filters instead of a Python loop for sobel in neon() - #10516
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patrick-immometrica wants to merge 1 commit into
Open
patrick-immometrica wants to merge 1 commit into
patrick-immometrica wants to merge 1 commit into
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Changes proposed in this pull request:
_sobel(), used by the newneon(), callsgetpixel()nine times for every pixel. SinceImageFilter.Kernelclips to 0-255,abs(gx)is the kernel result plus the negated kernel result, so four 3x3 filters andImageChops.add()give the same output.neon()on a 1024x768 image goes from 1.89 sec to 6.61 msec.