image-js/lib/stack/compute/maxImage.js

Image processing and manipulation in JavaScript

import { Image } from '../../Image.js';
import { checkProcessable } from '../utils/checkProcessable.js';
/**
 *  Returns a new image with the maximum values of each pixel from the stack.
 * @param stack - Stack to process.
 * @returns The maximum image.
 */
export function maxImage(stack) {
    checkProcessable(stack, { sameDimensions: true });
    const newImage = Image.createFrom(stack.getImage(0));
    const nbChannels = newImage.channels;
    for (let i = 0; i < stack.size; i++) {
        for (let j = 0; j < newImage.size; j++) {
            for (let channel = 0; channel < nbChannels; channel++) {
                newImage.setValueByIndex(j, channel, Math.max(newImage.getValueByIndex(j, channel), stack.getValueByIndex(i, j, channel)));
            }
        }
    }
    return newImage;
}
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