image-js/lib/compare/add.js

Image processing and manipulation in JavaScript

import { Image } from '../Image.js';
import { getClamp } from '../utils/clamp.js';
import checkProcessable from '../utils/validators/checkProcessable.js';
import { validateForComparison } from '../utils/validators/validators.js';
/**
 *
 * Calculate a new image that is the sum between the current image and the otherImage.
 * @param image - Image to which to add.
 * @param otherImage - Image to add.
 * @returns The summed image.
 */
export function add(image, otherImage) {
    if (image instanceof Image) {
        checkProcessable(image, {
            bitDepth: [8, 16],
            components: [1, 3],
            alpha: false,
        });
    }
    validateForComparison(image, otherImage);
    const newImage = image.clone();
    const clamp = getClamp(image);
    for (let index = 0; index < image.size; index++) {
        for (let channel = 0; channel < image.channels; channel++) {
            const value = image.getValueByIndex(index, channel) +
                otherImage.getValueByIndex(index, channel);
            newImage.setValueByIndex(index, channel, clamp(value));
        }
    }
    return newImage;
}
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