{

Mat frame;

Rect trackBox;

Point prePoint, curPoint;

VideoCapture capture;

bool gotTrackBox = false;

int interCount = 0;

int continue_fist = 0;

capture.open(0);

if (!capture.isOpened())

{

cout << "No camera!\n" << endl;

return -1;

}

HandTracker hand_tracker;

while (1)

{

/************ Get hand which need to be tracked ************/

while (!gotTrackBox)

{

capture >> frame;

if (frame.empty())

return -1;

if (hand_tracker.init(frame, trackBox))

{

gotTrackBox = true;

prePoint = Point(trackBox.x + 0.5 * trackBox.width, trackBox.y + 0.5 * trackBox.height);

}

imshow("handTracker", frame);

if (waitKey(2) == 27)

return -1;

}

capture >> frame;

double t = (double)cvGetTickCount();

/****************** Tracking hand **************************/

if (!hand_tracker.processFrame(frame, trackBox))

gotTrackBox = false;

/****************** Control the mouse *********************/

curPoint = Point(trackBox.x + 0.5 * trackBox.width, trackBox.y + 0.5 * trackBox.height);

int dx = curPoint.x - prePoint.x;

int dy = curPoint.y - prePoint.y;

float k = 1.5;

mouse_event(MOUSEEVENTF_MOVE, -k * dx, k * dy, 0, 0);

prePoint = curPoint;

// When you made a fist, means you click left button of mouse

// To avoid successive active within short time, when you had actived a single

// we will ingnore the next 10 frames

interCount++;

if (interCount > 10 && hand_tracker.detectFist(frame, trackBox))

{

// To avoid detecting error, need to successive detect three times successfully

continue_fist++;

if (continue_fist > 3)

{

interCount = 0;

cout << "YOU active a single click command!" << endl;

mouse_event(MOUSEEVENTF_LEFTDOWN, 0, 0, 0, 0);

mouse_event(MOUSEEVENTF_LEFTUP, 0, 0, 0, 0);

}

}

else

continue_fist = 0;

/******************* Show image ****************************/

rectangle(frame, trackBox, Scalar(0, 0, 255), 3);

imshow("handTracker", frame);

/******************* Show cost time ************************/

t = (double)cvGetTickCount() - t;

cout << "cost time: " << t / ((double)cvGetTickFrequency()*1000.) << endl;

if (cvWaitKey(3) == 27)

break;

}

return 0;