voluptasquisquam/src/image/roi/__tests__/mapInfo.js

Image processing and manipulation in JavaScript

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

/* Image to test:
0011
1111
1100
0000
 */
describe('mark a binary image 4 x 4 in 3 zones and create ROIs', function () {
    it('should yield the right result', function () {
        let data = new Uint8Array(2);
        data[0] = 63;
        data[1] = 192;

        let mask = new Image(4, 4, data, {
            kind: 'BINARY'
        });

        let roiManager = mask.getRoiManager();
        roiManager.fromMask(mask);


        let result = roiManager.getRois();

        result.sort(function (a, b) {
            return a.id - b.id;
        });

        let expected = [{id: -2, meanX: 1.8333333333333333, meanY: 2.6666666666666665, minX: 0, maxX: 3, minY: 2, maxY: 3, surface: 6},
            {id: -1, meanX: 0.5, meanY: 0, minX: 0, maxX: 1, minY: 0, maxY: 0, surface: 2},
            {id: 1, meanX: 1.5, meanY: 1, minX: 0, maxX: 3, minY: 0, maxY: 2, surface: 8}];


        result.should.have.lengthOf(3);

        result[0].should.containEql(expected[0]);
        result[1].should.containEql(expected[1]);
        result[2].should.containEql(expected[2]);
    });
});