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Imagick::unsharpMaskImage()

Imagick::unsharpMaskImage - Sharpens an image

Syntax

bool Imagick::unsharpMaskImage (float $radius, float $sigma, float $amount, float $threshold, int $channel)

Arguments

radius
sigma
amount
threshold
channel

Description

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.

Version

PHP PECL imagick 2.0.0

Return value

Returns TRUE on success.