Dither

Dither image. Dithering will reduce the color to black and white and add noise.

Parameters
type

Dithering algorithm to use. Options: diffusion, ordered. Defaults to diffusion.

Examples
$editor->apply( $image1, Grafika::createFilter( 'Dither', 'diffusion' ) );
$editor->apply( $image2, Grafika::createFilter( 'Dither', 'ordered' ) );

Test image:

lena

Diffusion dithering:
dither

Ordered dithering:
dither