The Imagick class
PHP Manual

Imagick::compareImageLayers

(PECL imagick 2.0.0)

Imagick::compareImageLayersReturns the maximum bounding region between images

说明

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.

参数

method

One of the layer method constants.

返回值

Returns TRUE on success.

错误/异常

Throws ImagickException on error.

范例

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 */
?>

参见


The Imagick class
PHP Manual