quantize

Color quantization. Specifies color-quantization attributes for GIF output conversion.

quantize= *type*[, *dither*[, *numColors*[, *colorList*]]]

type	{adaptive\|web\|mac} Specifies the palette type. Set to adaptive to calculate an optimal palette for the image. Set to web or mac to choose a pre-defined palette. Note: The mac pallet type is only supported for GIF and PNG8 formats but not for GIF-Alpha and PNG8-Alpha formats.
dither	{diffuse\|off} Specifies the dithering options. Set to diffuse for Floyd-Steinberg error diffusion Set to off to disable dithering.
numColors	Number of output colors (2-256) Specifies how many colors are included in the adaptive palette.
colorList	A comma-separated list of forced RGB colors in hex6 format Lets you specify colors to include in an adaptive palette. If the number of colors specified is less than numColors , additional colors are calculated based on the image content.

Properties

Request attribute. Applies regardless of current layer setting. Used only if fmt=gif, fmt=gif-alpha, fmt=png8, or fmt=png8-alpha. Ignored otherwise.

The colors specified with *colorList* must consist of RGB values in hex6 format (see [color](../../../../../is-api/http-ref/image-serving-api-ref/c-http-protocol-reference/c-command-reference/r-color-commandref.md#reference-b044954ec6184253b8831579466b4423)) without ’ 0x’ prefix. No other color specifiers are permitted. numColors must be between 2-256.