Customizing the Color Palette¶

By default, DeepDrill colorizes the computed images with a default color palette. A custom color palette can be used by assigning a path to a palette image to the palette.image key. Here is an example:

./deepdrill top.ini -o image.map -o image.jpg palette.image=dolomiti.png

Recolored Mandelbrot set

DeepDrill does not rely on a special palette format. Instead, the color palettes is specified in the form of a standard image file. For simplicity, there are no restrictions on the image format. DeepDrill composes the color palette from the pixels of the first horizontal line and ignores all others. The horizontal resolution of the palette does not affect the overall appearance of the image. However, wider images result in slightly smoother color transitions.

In addition, DeepDrill provides two keys to manipulate the color palette. Key palette.scale controls how fast the palette repeats. The following examples shows the effect:

./deepdrill top.ini -o image.map -o image.jpg palette.image=dolomiti.png palette.scale=10.0 

Recolored Mandelbrot set

Key palette.offset can be utilized to shift the color palette like so:

./deepdrill top.ini -o image.map -o image.jpg palette.image=dolomiti.png palette.scale=10.0 palette.offset=0.5

Recolored Mandelbrot set

Predefined palettes¶

In the example shown above we have used image file vulcano.png which is one of several predefined color palettes. The images below give an overview of the available choices. Since you can pass any image file, it is easy to colorize images with self-made palettes:

default Default palette