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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. 此方法在Imagick基于ImageMagick 6.2.9以上版本编译时可用。

参数

method

One of the layer method constants.

返回值

成功时返回 TRUE

错误/异常

错误时抛出 ImagickException。

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 */
?>

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