(PECL imagick 2.0.0)
Returns the maximum bounding region between images
Imagick Imagick::compareImageLayers ( int $method )
Compares each image with the next in a sequence and returns the maximum bounding region of any pixel differences it discovers. This method is available if Imagick has been compiled against ImageMagick version 6.2.9 or newer.
Parameters:
method
One of the layer method constants.
Returns:
Returns TRUE on success.
Exception:
Throws ImagickException on error.
Examples:
Using Imagick::compareImageLayers()
Comparing image layers
<?php
/* create new imagick object */
$im = new Imagick("test.gif");
/* optimize the image layers */
$result = $im->compareImageLayers(imagick::LAYERMETHOD_COALESCE);
/* work on the $result */
?>
See also:
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