image-js/lib/roi/colorRois.js

Image processing and manipulation in JavaScript

import { Image } from '../Image.js';
import { getColorMap } from './utils/getColorMap.js';
export const RoisColorMode = {
    /**
     * Only two acceptable values: red or green.
     */
    BINARY: 'binary',
    /**
     * Palette of reds and blues.
     */
    SATURATION: 'saturation',
    /**
     * All possible hues (gradient of colors).
     */
    RAINBOW: 'rainbow',
};
/**
 * Generate an image with all the ROIs of various colors.
 * @param roiMapManager - The ROI map manager.
 * @param options - Color ROIs options.
 * @returns The colored image.
 */
export function colorRois(roiMapManager, options = {}) {
    const { roiKind = 'bw', mode = 'binary' } = options;
    const map = roiMapManager.getMap();
    const image = new Image(map.width, map.height, {
        colorModel: 'RGBA',
    });
    const colorMap = getColorMap({
        roiKind,
        mode,
        nbNegative: map.nbNegative,
        nbPositive: map.nbPositive,
    });
    const data32 = new Uint32Array(image.getRawImage().data.buffer);
    for (let index = 0; index < image.size; index++) {
        data32[index] = colorMap[map.data[index] + map.nbNegative];
    }
    return image;
}
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