(No version information available, might be only in CVS)
Imagick::unsharpMaskImage — Sharpens an image
This 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.
Returns TRUE on success.
Throws ImagickException on error.