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.
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