Imagick::autoLevelImage
(PECL imagick 3 >= 3.3.0)
Imagick::autoLevelImage — Adjusts the levels of a particular image channel
说明
Adjusts the levels of a particular image channel by scaling the minimum and maximum values to the full quantum range.
参数
channel
-
Which channel should the auto-levelling should be done on.
返回值
成功时返回 true
。
示例
示例 #1 Imagick::autoLevelImage()
<?php
function autoLevelImage($imagePath) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->autoLevelImage();
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>
+添加备注
用户贡献的备注
此页面尚无用户贡献的备注。
备份地址:http://www.lvesu.com/blog/php/imagick.autolevelimage.php