voluptasquisquam/src/image/compute/__tests__/median.js

Image processing and manipulation in JavaScript

import {Image} from 'test/common';
import 'should';

describe('check median', function () {
    it('for a GREY even image', function () {

        let image = new Image(4, 3,
            [
                1, 1, 1, 1,
                2, 2, 2, 2,
                3, 3, 3, 3
            ],
            {kind: 'GREY'}
        );

        image.median.should.eql([2]);
    });

    it('for a GREY odd image', function () {

        let image = new Image(3, 3,
            [
                1, 1, 1,
                2, 2, 2,
                3, 3, 3
            ],
            {kind: 'GREY'}
        );

        image.median.should.eql([2]);
    });

    it('for a RGBA image', function () {

        let image = new Image(1, 3,
            [
                1, 2, 3, 255,
                2, 3, 4, 255,
                3, 4, 5, 255
            ]
        );
        image.median.should.eql([2, 3, 4]);
    });

    it('for a RGBA image with alpha', function () {

        let image = new Image(1, 3,
            [
                1, 2, 3, 100,
                2, 3, 4, 100,
                3, 4, 5, 200
            ]
        );

        image.median.should.eql([2.5, 3.5, 4.5]);
    });

});