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Gmagick::embossImage() is a method provided by the Gmagick extension in PHP, which is a wrapper around the GraphicsMagick library. This function is used to apply an embossing effect to an image.

The embossing effect creates a raised or sunken 3D appearance by highlighting the differences in brightness between adjacent pixels. It simulates the effect of stamping or pressing an image onto a surface.

Here is an example of using Gmagick::embossImage() in PHP:

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

// Apply embossing effect with default parameters
$image->embossImage(0, 1);

// Write the resulting image to a file
$image->write('path/to/output/image.jpg');


In the example above, the embossImage() function is called on a Gmagick object created from an input image file. The embossing effect is applied with two parameters: the first parameter is the radius of the embossing kernel, and the second parameter is the sigma value (standard deviation) of the Gaussian operator used for convolution. In this case, the radius is set to 0, and the sigma is set to 1.

After applying the embossing effect, the resulting image is saved to an output file using the write() method of the Gmagick object.

You can modify the parameters passed to embossImage() to achieve different embossing effects. Experimenting with different values for the radius and sigma can produce variations in the embossed appearance of the image.