Imagick::autoLevelImage
(PECL imagick 3 >= 3.3.0)
Imagick::autoLevelImage — Description
説明
public Imagick::autoLevelImage
([ int $channel = Imagick::CHANNEL_DEFAULT
] ) : bool
Adjusts the levels of a particular image channel by scaling the minimum and maximum values to the full quantum range.
パラメータ
channel- Which channel should the auto-levelling should be done on.
返り値
成功した場合に true を返します。
例
例1 Imagick::autoLevelImage()
<?phpfunction autoLevelImage($imagePath) { $imagick = new \Imagick(realpath($imagePath)); $imagick->autoLevelImage(); header("Content-Type: image/jpg"); echo $imagick->getImageBlob();}?>
