The Imagick class
PHP Manual

Imagick::uniqueImageColors

(PECL imagick 2.0.0)

Imagick::uniqueImageColorsDiscards all but one of any pixel color

说明

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.

返回值

Returns TRUE on success.


The Imagick class
PHP Manual