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.
Simulates motion blur. 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 MotionBlurImage() selects a suitable
radius for you. Angle gives the angle of the blurring motion.
Return Values
Returns TRUE
on success.