Gmagick
PHP Manual

Gmagick::getimagegamma

(PECL gmagick >= Unknown)

Gmagick::getimagegamma — Gets the image gamma

Description

public float Gmagick::getimagegamma ( void )

Gets the image gamma

Parameters

This function has no parameters.

Return Values

Returns the image gamma on success

Errors/Exceptions

Throws an GmagickException on error.

Gmagick
PHP Manual