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(PECL imagick 2.0.0)
Imagick::sharpenImage — Sharpens an image
$radius
, float $sigma
[, int $channel
= Imagick::CHANNEL_ALL
] )Sharpens an image. We convolve the image with a Gaussian operator of the given radius and standard deviation (sigma). For reasonable results, the radius should be larger than sigma. Use a radius of 0 and Imagick::sharpenImage() selects a suitable radius for you.
radius
sigma
channel
成功时返回 TRUE
。
Example #1 Imagick::sharpenImage()
<?php
function sharpenImage ( $imagePath , $radius , $sigma , $channel ) {
$imagick = new \ Imagick ( realpath ( $imagePath ));
$imagick -> sharpenimage ( $radius , $sigma , $channel );
header ( "Content-Type: image/jpg" );
echo $imagick -> getImageBlob ();
}
?>