(PECL imagick 2, PECL imagick 3)
Imagick::reduceNoiseImage — Smooths the contours of an image
此函数在 Imagick 3.4.4 中被 废弃，强烈建议不要应用此函数。
Smooths the contours of an image while still preserving edge information. The algorithm works by replacing each pixel with its neighbor closest in value. A neighbor is defined by radius. Use a radius of 0 and Imagick::reduceNoiseImage() selects a suitable radius for you.
radius
成功时返回 true。
错误时抛出 ImagickException。
示例 #1 Imagick::reduceNoiseImage()
<?php
function reduceNoiseImage($imagePath, $reduceNoise) {
$imagick = new \Imagick(realpath($imagePath));
@$imagick->reduceNoiseImage($reduceNoise);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>