opencv/modules/imgproc/test/test_pc.cpp

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#include "test_precomp.hpp"

using namespace cv;
using namespace std;

namespace cvtest
{

/// phase correlation
class CV_PhaseCorrelatorTest : public cvtest::ArrayTest
{
public:
    CV_PhaseCorrelatorTest();
protected:
    void run( int );
};

CV_PhaseCorrelatorTest::CV_PhaseCorrelatorTest() {}

void CV_PhaseCorrelatorTest::run( int )
{
    ts->set_failed_test_info(cvtest::TS::OK);

    Mat r1 = Mat::ones(Size(128, 128), CV_64F);
    Mat r2 = Mat::ones(Size(128, 128), CV_64F);

    double expectedShiftX = -10.0;
    double expectedShiftY = -20.0;

    // draw 10x10 rectangles @ (100, 100) and (90, 80) should see ~(-10, -20) shift here...
    cv::rectangle(r1, Point(100, 100), Point(110, 110), Scalar(0, 0, 0), CV_FILLED);
    cv::rectangle(r2, Point(90, 80), Point(100, 90), Scalar(0, 0, 0), CV_FILLED);

    Mat hann;
    createHanningWindow(hann, r1.size(), CV_64F);
    Point2d phaseShift = phaseCorrelate(r1, r2, hann);

    // test accuracy should be less than 1 pixel...
    if((expectedShiftX - phaseShift.x) >= 1 || (expectedShiftY - phaseShift.y) >= 1)
    {
         ts->set_failed_test_info( cvtest::TS::FAIL_BAD_ACCURACY );
    }
}

TEST(Imgproc_PhaseCorrelatorTest, accuracy) { CV_PhaseCorrelatorTest test; test.safe_run(); }

}