Reference

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noise_perlin

Arguments:

Description:

Render 2D or 3D Perlin noise on selected images, from specified coordinates.

The Perlin noise is a specific type of smooth noise,
described here : https://en.wikipedia.org/wiki/Perlin_noise.

Default values:

scale_x=scale_y=scale_z=16 and seed_x=seed_y=seed_z=0.

Example of use:

$ gmic 500,500,1,3 noise_perlin ,

Command: 500,500,1,3 noise_perlin ,