Imagick::autoLevelImage()
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Description
说明
public Imagick::autoLevelImage([int $channel= Imagick::CHANNEL_DEFAULT]): bool
Adjusts the levels of a particular image channel by scaling the minimum and maximum values to the full quantum range.
参数
- $channel
Which channel should the auto-levelling should be done on.
返回值
成功时返回TRUE
。
范例
Example #1 Imagick::autoLevelImage()
<?php function autoLevelImage($imagePath) { $imagick = new \Imagick(realpath($imagePath)); $imagick->autoLevelImage(); header("Content-Type: image/jpg"); echo $imagick->getImageBlob(); } ?>