image-js/lib/utils/getDefaultColor.js

Image processing and manipulation in JavaScript

import { match } from 'ts-pattern';
/**
 * Get the default color for a given color model.
 * The color is black for images and 1 for masks.
 * @param image - The used image.
 * @returns Default color.
 */
export function getDefaultColor(image) {
    return match(image.colorModel)
        .with('GREY', () => [0])
        .with('GREYA', () => [0, image.maxValue])
        .with('RGB', () => [0, 0, 0])
        .with('RGBA', () => [0, 0, 0, image.maxValue])
        .with('BINARY', () => [1])
        .exhaustive();
}
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