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Imagick::compareImageLayers
Returns the maximum bounding region between images
()
Imagick Imagick::compareImageLayers ( int method )
Warning:
This function is currently not documented; only the argument list is available.
Warning:
This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change without notice in a future release of PHP. Use this function at your own risk.
Compares each image with the next in a sequence and returns the maximum bounding region of any pixel differences it discovers.