@thi.ng/pixel-dither/ordered.d.ts

Extensible image dithering w/ various algorithm presets

import type { IntBuffer } from "@thi.ng/pixel";
import type { BayerMatrix, BayerSize } from "./api.js";
/**
 * Creates a Bayer matrix of given kernel size (power of 2) for ordered
 * dithering and use with {@link orderedDither}.
 *
 * @remarks
 * Reference:
 * https://en.wikipedia.org/wiki/Ordered_dithering
 *
 * @param size -
 */
export declare const defBayer: (size: BayerSize) => BayerMatrix;
/**
 * Applies in-place, ordered dithering using provided dither matrix
 * (or matrix size) and desired number of dither levels, optionally
 * specified individually (per channel). Each channel is be
 * processed independently. Channels can be excluded from dithering
 * by setting their target colors to zero or negative numbers.
 *
 * @remarks
 * A `size` of 1 will result in simple posterization of each
 * channel. The `numColors` value(s) MUST be in the `[0 ..
 * numColorsInChannel]` interval.
 *
 * Also see: {@link defBayer}
 *
 * @param img - pixel buffer
 * @param size - bayer dither matrix/size
 * @param numColors - num target colors/steps
 */
export declare const orderedDither: (img: IntBuffer, size: BayerSize | BayerMatrix, numColors: number | number[]) => IntBuffer;
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