@alttiri/image-hash/src/mono-image-data.js

Alt-Image-Hash. An alternative image hashing library.

/** ImageData fot only one channel (luminance). */
export class MonoImageData {
    constructor(data, width, height) {
        this.channels = 1;
        const mult = width * height;
        if (mult !== data.length || !mult) {
            throw new Error("Incorrect data");
        }
        this.data = data;
        this.width = width;
        this.height = height;
    }
    newInstance(data, width, height) {
        // @ts-ignore
        return new this.constructor(data, width, height);
    }
}
/** "binary"/"black-white" image pixels (`0` and `255` values) */
export class BiImageData extends MonoImageData {
    constructor() {
        super(...arguments);
        this.type = "binary";
    }
}
/** "gray-scaled" image pixels (values from `0` up to `255`) */
export class GrayImageData extends MonoImageData {
    constructor() {
        super(...arguments);
        this.type = "gray-scaled";
    }
}