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Imagick::remapImage — Remaps image colors
Replaces colors an image with those defined by
replacement. The colors are replaced with the closest possible color. This method is available if Imagick has been compiled against ImageMagick version 6.4.5 or newer.
An Imagick object containing the replacement colors
Refer to this list of dither method constants
TRUE on success.
Throws ImagickException on error.