(PECL imagick 2, PECL imagick 3)
Imagick::adaptiveSharpenImage — Adaptively sharpen the image
$radius, float $sigma, int $channel = Imagick::CHANNEL_DEFAULT): boolAdaptively 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。
radiusThe radius of the Gaussian, in pixels, not counting the center pixel. Use 0 for auto-select.
sigmaThe 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
成功时返回 true。
示例 #1 A Imagick::adaptiveSharpenImage() example
Adaptively sharpen the image with radius 2 and sigma 1.
<?php
try {
$image = new Imagick('image.png');
$image->adaptiveSharpenImage(2,1);
} catch(ImagickException $e) {
echo 'Error: ' , $e->getMessage();
die();
}
header('Content-type: image/png');
echo $image;
?>