Php/docs/imagick.adaptivesharpenimage

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• Adaptively sharpen the image

Imagick::adaptiveSharpenImage

(PECL imagick 2, PECL imagick 3)

Imagick::adaptiveSharpenImage — Adaptively sharpen the image

说明

public Imagick::adaptiveSharpenImage ( float $radius , float $sigma [, int $channel = Imagick::CHANNEL_DEFAULT ] ) : bool

Adaptively sharpen the image by sharpening more intensely near image edges and less intensely far from edges. 此方法在Imagick基于ImageMagick 6.2.9以上版本编译时可用。

参数

radius

The radius of the Gaussian, in pixels, not counting the center pixel. Use 0 for auto-select.

sigma

The standard deviation of the Gaussian, in pixels.

channel

Provide any channel constant that is valid for your channel mode. To apply to more than one channel, combine channel constants using bitwise operators. 缺省为Imagick::CHANNEL_DEFAULT. 参考此 通道常数列表

返回值

成功时返回 true。

范例

Example #1 A Imagick::adaptiveSharpenImage() example

Adaptively sharpen the image with radius 2 and sigma 1.

<?phptry {    $image = new Imagick('image.png');    $image->adaptiveSharpenImage(2,1);} catch(ImagickException $e) {    echo 'Error: ' , $e->getMessage();    die();}header('Content-type: image/png');echo $image;?>

参见

• Imagick::sharpenImage() - Sharpens an image