Simulates a charcoal drawing

# Gmagick::charcoalimage

(PECL gmagick >= Unknown)

Gmagick::charcoalimage — Simulates a charcoal drawing

### Description

public Gmagick::charcoalimage(float `$radius`, float `$sigma`): Gmagick

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

The Gmagick object with charcoal simulation.

### Errors/Exceptions

Throws an GmagickException on error.

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