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Imagick::functionImage — Applies a function on the image
$function
, array $arguments
[, int $channel
= Imagick::CHANNEL_DEFAULT
] )Applies an arithmetic, relational, or logical expression to an image. Use these operators to create lighter or darker versions of an image, to increase or decrease contrast in an image, or to negate the image colors. This method is available if Imagick has been compiled against ImageMagick version 6.4.9 or newer.
function
Refer to this list of function constants
arguments
Array of arguments to pass to this function.
Returns TRUE
on success.
Throws ImagickException on error.