(PECL imagick 2.0.0)
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. �˷�����Imagick����ImageMagick 6.2.9���ϰ汾����ʱ���á�
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. ȱʡΪImagick::CHANNEL_DEFAULT.
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Example #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;
?>