Imagick::compareImageLayers
(PECL imagick 2, PECL imagick 3)
Imagick::compareImageLayers — Returns the maximum bounding region between images
Description
public Imagick::compareImageLayers ( int $method ) : Imagick
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.
Return Values
Returns true on success.
Errors/Exceptions
Throws ImagickException on error.
Examples
Example #1 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
- Imagick::optimizeImageLayers() - Removes repeated portions of images to optimize
- Imagick::writeImages() - Writes an image or image sequence
- Imagick::writeImage() - Writes an image to the specified filename
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https://www.php.net/manual/en/imagick.compareimagelayers.php