Imagick::unsharpMaskImage

(no version information, might be only in CVS)

Imagick::unsharpMaskImage -- Sharpens an image

Description

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

Warning

This function is currently not documented; only the argument list is available.

Warning

This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change without notice in a future release of PHP. Use this function at your own risk.

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

Its description

sigma

Its description

amount

Its description

threshold

Its description

channel

Its description

Return Values

Returns TRUE on success.