Imagick::unsharpMaskImage
(PECL imagick 2.0.0)
Imagick::unsharpMaskImage — Sharpens an image
Description
bool Imagick::unsharpMaskImage ( float $radius , float $sigma , float $amount , float $threshold [, int $channel = Imagick::CHANNEL_ALL ] )Sharpens an image. We convolve the image with a Gaussian operator of the given radius and standard deviation (sigma). For reasonable results, radius should be larger than sigma. Use a radius of 0 and Imagick::UnsharpMaskImage() selects a suitable radius for you.
Parameters
radius sigma amount threshold channel
Return Values
Returns TRUE on success.
Errors/Exceptions
Throws ImagickException on error.
Examples
Example #1 Imagick::unsharpMaskImage()
<?php
function?unsharpMaskImage($imagePath,?$radius,?$sigma,?$amount,?$unsharpThreshold)?{
????$imagick?=?new?\Imagick(realpath($imagePath));
????$imagick->unsharpMaskImage($radius,?$sigma,?$amount,?$unsharpThreshold);
????header("Content-Type:?image/jpg");
????echo?$imagick->getImageBlob();
}
?>← Imagick::uniqueImageColors
Imagick::valid →
? 1997–2017 The PHP Documentation GroupLicensed under the Creative Commons Attribution License v3.0 or later.
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