Imagick::trimImage

(PECL imagick 2.0.0)

Imagick::trimImage — Remove edges from the image

说明

bool Imagick::trimImage ( float $fuzz )

Remove edges that are the background color from the image. 此方法在Imagick基于ImageMagick 6.2.9以上版本编译时可用。

参数

fuzz: By default target must match a particular pixel color exactly. However, in many cases two colors may differ by a small amount. The fuzz member of image defines how much tolerance is acceptable to consider two colors as the same. This parameter represents the variation on the quantum range.

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::trimImage():

Trim an image, then display to the browser.


<?php
/* Create the object and read the image in */
$im = new Imagick("image.jpg");

/* Trim the image. */
$im->trimImage(0);

/* Ouput the image */
header("Content-Type: image/" . $im->getImageFormat());
echo $im;
?>

参见

Imagick::getQuantumDepth() - Gets the quantum depth
Imagick::getQuantumRange() - Returns the Imagick quantum range

PHP手册 - N: Remove edges from the image

用户评论:

dhp (23-Apr-2009 12:31)

After operations that change the crop of the image, like trimImage does, IM preserves the old canvas and positioning info. If you need to do additional operations on the image based on the new size, you'll need to reset this info with setImagePage. This is the equivalent of the +repage command line argument. <?php $im->trimImage(0); $im->setImagePage(0, 0, 0, 0); ?>

Mark van der Velden (06-Dec-2007 09:35)

This method requires ImageMagick version >= 6.2.8