Imagick::trimImage
Imagick::unsharpMaskImage
Imagick
PHP Manual

# Imagick::uniqueImageColors

(PECL imagick 2.0.0)

Imagick::uniqueImageColors — Discards 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::trimImage
Imagick::unsharpMaskImage
Imagick
PHP Manual