(PECL gmagick >= Unknown)
Gmagick::charcoalimage — Simulates a charcoal drawing
Simulates a charcoal drawing.
radiusThe radius of the Gaussian, in pixels, not counting the center pixel.
sigmaThe standard deviation of the Gaussian, in pixels.
The Gmagick object with charcoal simulation.
錯誤時(shí)拋出 GmagickException。