Imagick::unsharpMaskImage
(No version information available, might be only in CVS)
Imagick::unsharpMaskImage — Sharpens an image
Description
bool Imagick::unsharpMaskImage
( float $radius
, float $sigma
, float $amount
, float $threshold
[, int $channel
] )
WarningThis function is
currently not documented; only its argument list is available.
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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