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
- sigma
- amount
- threshold
- channel
Return Values
Returns TRUE
on success.