Imagick::unsharpMaskImage
(PECL imagick 2, PECL imagick 3)
Imagick::unsharpMaskImage — Sharpens an image
Description
public Imagick::unsharpMaskImage ( float $radius , float $sigma , float $amount , float $threshold [, int $channel = Imagick::CHANNEL_DEFAULT ] ) : bool
Sharpens an image. We convolve the image with a Gaussian operator of the given radius and standard deviation (sigma). For reasonable results, radius should be larger than sigma. Use a radius of 0 and Imagick::UnsharpMaskImage() selects a suitable radius for you.
Parameters
-
radius -
sigma -
amount -
threshold -
channel
Return Values
Returns true on success.
Errors/Exceptions
Throws ImagickException on error.
Examples
Example #1 Imagick::unsharpMaskImage()
<?php
function unsharpMaskImage($imagePath, $radius, $sigma, $amount, $unsharpThreshold) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->unsharpMaskImage($radius, $sigma, $amount, $unsharpThreshold);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>
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https://www.php.net/manual/en/imagick.unsharpmaskimage.php