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Imagick::uniqueImageColors
Discards all but one of any pixel color
()
bool Imagick::uniqueImageColors ( )
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.
Discards all but one of any pixel color.