Php/docs/imagick.compareimagelayers
来自菜鸟教程
Imagick::compareImageLayers
(PECL imagick 2, PECL imagick 3)
Imagick::compareImageLayers — Returns the maximum bounding region between images
说明
public Imagick::compareImageLayers
( int $method
) : Imagick
Compares each image with the next in a sequence and returns the maximum bounding region of any pixel differences it discovers. 此方法在Imagick基于ImageMagick 6.2.9以上版本编译时可用。
返回值
成功时返回 true
。
错误/异常
错误时抛出 ImagickException。
范例
Example #1 Using Imagick::compareImageLayers()
Comparing image layers
<?php/* create new imagick object */$im = new Imagick("test.gif");/* optimize the image layers */$result = $im->compareImageLayers(imagick::LAYERMETHOD_COALESCE);/* work on the $result */?>
参见
- Imagick::optimizeImageLayers() - Removes repeated portions of images to optimize
- Imagick::writeImages() - Writes an image or image sequence
- Imagick::writeImage() - 把图片写入指定的文件