opencv/modules/calib/misc/java/test/CalibTest.java

package org.opencv.test.calib;

import java.util.ArrayList;

import org.opencv.cv3d.Cv3d;
import org.opencv.calib.Calib;
import org.opencv.core.Core;
import org.opencv.core.CvType;
import org.opencv.core.Mat;
import org.opencv.core.MatOfDouble;
import org.opencv.core.MatOfPoint2f;
import org.opencv.core.MatOfPoint3f;
import org.opencv.core.Point;
import org.opencv.core.Scalar;
import org.opencv.core.Size;
import org.opencv.test.OpenCVTestCase;
import org.opencv.imgproc.Imgproc;

public class CalibTest extends OpenCVTestCase {

    Size size;

    @Override
    protected void setUp() throws Exception {
        super.setUp();

        size = new Size(3, 3);
    }

    public void testFindChessboardCornersMatSizeMat() {
        Size patternSize = new Size(9, 6);
        MatOfPoint2f corners = new MatOfPoint2f();
        Calib.findChessboardCorners(grayChess, patternSize, corners);
        assertFalse(corners.empty());
    }

    public void testFindChessboardCornersMatSizeMatInt() {
        Size patternSize = new Size(9, 6);
        MatOfPoint2f corners = new MatOfPoint2f();
        Calib.findChessboardCorners(grayChess, patternSize, corners, Calib.CALIB_CB_ADAPTIVE_THRESH + Calib.CALIB_CB_NORMALIZE_IMAGE
                + Calib.CALIB_CB_FAST_CHECK);
        assertFalse(corners.empty());
    }

    public void testFind4QuadCornerSubpix() {
        Size patternSize = new Size(9, 6);
        MatOfPoint2f corners = new MatOfPoint2f();
        Size region_size = new Size(5, 5);
        Calib.findChessboardCorners(grayChess, patternSize, corners);
        Calib.find4QuadCornerSubpix(grayChess, corners, region_size);
        assertFalse(corners.empty());
    }

    public void testFindCirclesGridMatSizeMat() {
        int size = 300;
        Mat img = new Mat(size, size, CvType.CV_8U);
        img.setTo(new Scalar(255));
        Mat centers = new Mat();

        assertFalse(Calib.findCirclesGrid(img, new Size(5, 5), centers));

        for (int i = 0; i < 5; i++)
            for (int j = 0; j < 5; j++) {
                Point pt = new Point(size * (2 * i + 1) / 10, size * (2 * j + 1) / 10);
                Imgproc.circle(img, pt, 10, new Scalar(0), -1);
            }

        assertTrue(Calib.findCirclesGrid(img, new Size(5, 5), centers));

        assertEquals(25, centers.rows());
        assertEquals(1, centers.cols());
        assertEquals(CvType.CV_32FC2, centers.type());
    }

    public void testFindCirclesGridMatSizeMatInt() {
        int size = 300;
        Mat img = new Mat(size, size, CvType.CV_8U);
        img.setTo(new Scalar(255));
        Mat centers = new Mat();

        assertFalse(Calib.findCirclesGrid(img, new Size(3, 5), centers, Calib.CALIB_CB_CLUSTERING
                | Calib.CALIB_CB_ASYMMETRIC_GRID));

        int step = size * 2 / 15;
        int offsetx = size / 6;
        int offsety = (size - 4 * step) / 2;
        for (int i = 0; i < 3; i++)
            for (int j = 0; j < 5; j++) {
                Point pt = new Point(offsetx + (2 * i + j % 2) * step, offsety + step * j);
                Imgproc.circle(img, pt, 10, new Scalar(0), -1);
            }

        assertTrue(Calib.findCirclesGrid(img, new Size(3, 5), centers, Calib.CALIB_CB_CLUSTERING
                | Calib.CALIB_CB_ASYMMETRIC_GRID));

        assertEquals(15, centers.rows());
        assertEquals(1, centers.cols());
        assertEquals(CvType.CV_32FC2, centers.type());
    }

    public void testConstants()
    {
        // calib3d.hpp: some constants have conflict with constants from 'fisheye' namespace
        assertEquals(1, Calib.CALIB_USE_INTRINSIC_GUESS);
        assertEquals(2, Calib.CALIB_FIX_ASPECT_RATIO);
        assertEquals(4, Calib.CALIB_FIX_PRINCIPAL_POINT);
        assertEquals(8, Calib.CALIB_ZERO_TANGENT_DIST);
        assertEquals(16, Calib.CALIB_FIX_FOCAL_LENGTH);
        assertEquals(32, Calib.CALIB_FIX_K1);
        assertEquals(64, Calib.CALIB_FIX_K2);
        assertEquals(128, Calib.CALIB_FIX_K3);
        assertEquals(0x0800, Calib.CALIB_FIX_K4);
        assertEquals(0x1000, Calib.CALIB_FIX_K5);
        assertEquals(0x2000, Calib.CALIB_FIX_K6);
        assertEquals(0x4000, Calib.CALIB_RATIONAL_MODEL);
        assertEquals(0x8000, Calib.CALIB_THIN_PRISM_MODEL);
        assertEquals(0x10000, Calib.CALIB_FIX_S1_S2_S3_S4);
        assertEquals(0x40000, Calib.CALIB_TILTED_MODEL);
        assertEquals(0x80000, Calib.CALIB_FIX_TAUX_TAUY);
        assertEquals(0x100000, Calib.CALIB_USE_QR);
        assertEquals(0x200000, Calib.CALIB_FIX_TANGENT_DIST);
        assertEquals(0x100, Calib.CALIB_FIX_INTRINSIC);
        assertEquals(0x200, Calib.CALIB_SAME_FOCAL_LENGTH);
        assertEquals(0x400, Calib.CALIB_ZERO_DISPARITY);
        assertEquals((1 << 17), Calib.CALIB_USE_LU);
        assertEquals((1 << 22), Calib.CALIB_USE_EXTRINSIC_GUESS);
    }

    public void testEstimateNewCameraMatrixForUndistortRectify() {
        Mat K = new Mat().eye(3, 3, CvType.CV_64FC1);
        Mat K_new = new Mat().eye(3, 3, CvType.CV_64FC1);
        Mat K_new_truth = new Mat().eye(3, 3, CvType.CV_64FC1);
        Mat D = new Mat().zeros(4, 1, CvType.CV_64FC1);

        K.put(0,0,600.4447738238429);
        K.put(1,1,578.9929805505851);
        K.put(0,2,992.0642578801213);
        K.put(1,2,549.2682624212172);

        D.put(0,0,-0.05090103223466704);
        D.put(1,0,0.030944413642173308);
        D.put(2,0,-0.021509225493198905);
        D.put(3,0,0.0043378096628297145);

        K_new_truth.put(0,0, 387.5118215642316);
        K_new_truth.put(0,2, 1033.936556777084);
        K_new_truth.put(1,1, 373.6673784974842);
        K_new_truth.put(1,2, 538.794152656429);

        Calib.fisheye_estimateNewCameraMatrixForUndistortRectify(K,D,new Size(1920,1080),
                    new Mat().eye(3, 3, CvType.CV_64F), K_new, 0.0, new Size(1920,1080));

        assertMatEqual(K_new, K_new_truth, EPS);
    }

}