Imagick
PHP Manual

Imagick::uniqueImageColors

(PECL imagick 2.0.0)

Imagick::uniqueImageColorsDiscards all but one of any pixel color

Description

bool Imagick::uniqueImageColors ( void )

Discards all but one of any pixel color. This method is available if Imagick has been compiled against ImageMagick version 6.2.9 or newer.

Return Values

Returns TRUE on success.


Imagick
PHP Manual