(PECL imagick 2, PECL imagick 3)
Imagick::quantizeImages — Analyzes the colors within a sequence of images
public Imagick::quantizeImages ( int $numberColors , int $colorspace , int $treedepth , bool $dither , bool $measureError ) : bool
numberColors
colorspace
treedepth
dither
measureError
Returns true on success.
Throws ImagickException on error.
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https://www.php.net/manual/en/imagick.quantizeimages.php