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Gmagick::charcoalimage is a method in the Gmagick extension for PHP that applies a charcoal effect to an image.

The charcoal effect gives an image a sketched or drawn appearance, similar to charcoal artwork. It can be used to create unique visual effects or enhance the artistic appeal of an image.

To use Gmagick::charcoalimage, you first need to install the Gmagick extension for PHP and have it enabled in your PHP configuration.

Here is an example of how to use Gmagick::charcoalimage:

php
<?php
// Create a new Gmagick object
$image = new Gmagick('path/to/image.jpg');

// Apply the charcoal effect
$image->charcoalimage(2, 1);

// Save the resulting image
$image->writeImage('path/to/output.jpg');


In this example, the charcoalimage method is called on a Gmagick object (representing an image file) and takes two parameters: radius and sigma. The radius parameter determines the radius of the Gaussian function, while the sigma parameter defines how much the random function contributes to the result. You can adjust these values based on your desired effect.

After applying the charcoal effect, the resulting image is saved using the writeImage method.

Please note that the Gmagick extension requires the GraphicsMagick library to be installed on your server. Make sure you have both the extension and the library set up properly before using Gmagick::charcoalimage.