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 a charcoal drawing.
Parameters
- radius
The radius of the Gaussian, in pixels, not counting the center pixel
- sigma
The standard deviation of the Gaussian, in pixels
Return Values
Returns TRUE
on success.