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

Image processing and manipulation in JavaScript

import fromWaterShed from '../creator/fromWaterShed';
import {Image} from 'test/common';
import 'should';

describe('Merge Roi', function () {
    it('should fusion 2 ROIs', function () {

        let image = new Image(10, 10,
            [
                3, 3, 3, 3, 3, 3, 3, 2, 2, 2,
                3, 3, 2, 2, 2, 3, 3, 2, 2, 4,
                4, 3, 2, 1, 2, 2, 3, 1, 2, 4,
                4, 3, 2, 2, 2, 2, 3, 3, 3, 4,
                4, 4, 4, 3, 2, 3, 3, 3, 3, 4,
                4, 4, 4, 3, 3, 3, 3, 3, 3, 3,
                4, 3, 3, 3, 3, 3, 2, 2, 2, 3,
                4, 4, 3, 3, 3, 3, 2, 1, 2, 2,
                4, 4, 4, 4, 3, 2, 2, 2, 2, 3,
                4, 4, 4, 4, 3, 3, 3, 3, 2, 3
            ],
            {kind: 'GREY'}
        );
        let mask = new Image(10, 10, {kind: 'BINARY'});
        for (let i = 0; i < 10; i++) {
            for (let j = 0; j < 10; j++) {
                if (image.data[i + j * 10] !== 4) {
                    mask.clearBitXY(i, j);
                } else {
                    mask.setBitXY(i, j);
                }
            }
        }

        let roiMap = fromWaterShed.call(image, {fillMaxValue: 5, mask: mask});

        let roiManager = image.getRoiManager();
        roiManager.putMap(roiMap.data);

        roiManager.mergeRoi({
            minCommonBorderLength: 3,
            maxCommonBorderLength: 5,
        });

        Array.from(roiMap.data).should.eql(
            [
                1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
                1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
                0, 1, 1, 1, 1, 1, 1, 1, 1, 0,
                0, 1, 1, 1, 1, 1, 1, 1, 1, 0,
                0, 0, 0, 1, 1, 1, 1, 1, 1, 0,
                0, 0, 0, 3, 1, 3, 3, 3, 3, 3,
                0, 3, 3, 3, 3, 3, 3, 3, 3, 3,
                0, 0, 3, 3, 3, 3, 3, 3, 3, 3,
                0, 0, 0, 0, 3, 3, 3, 3, 3, 3,
                0, 0, 0, 0, 3, 3, 3, 3, 3, 3
            ]
        );
    });
});