(PECL gmagick >= Unknown)
Gmagick::solarizeimage — Applies a solarizing effect to the image
public Gmagick::solarizeimage ( int $threshold ) : Gmagick
Applies a special effect to the image, similar to the effect achieved in a photo darkroom by selectively exposing areas of photo sensitive paper to light. Threshold ranges from 0 to QuantumRange and is a measure of the extent of the solarization.
threshold
Define the extent of the solarization.
The Gmagick object on success.
Throws an GmagickException on error.
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https://www.php.net/manual/en/gmagick.solarizeimage.php