PHP Manual Function Reference Image Processing and Generation Gmagick Gmagick Gmagick::equalizeimage Gmagick::enhanceimage Gmagick::flipimage Gmagick::equalizeimage (PECL gmagick >= Unknown)Gmagick::equalizeimage — Equalizes the image histogram Description public Gmagick Gmagick::equalizeimage ( void ) Equalizes the image histogram. Return Values The equalized Gmagick object. Errors/Exceptions Throws an GmagickException on error.