Esempio n. 1
0
void Loop(void)
{
	XnStatus nRetVal = XN_STATUS_OK;


	while (g_notDone)
	{

		if ((nRetVal = g_context.WaitOneUpdateAll(g_depth)) != XN_STATUS_OK)
			//if ((nRetVal = g_context.WaitAndUpdateAll()) != XN_STATUS_OK)
		{
			fprintf(stderr,"Could not update data: %s\n", xnGetStatusString(nRetVal));
			continue;
		}
		if (g_haveDepth)
		{
			const XnDepthPixel* pDepthMap = g_depth.GetDepthMap();
			ProcessDepthFrame(pDepthMap, g_depthWidth, g_depthHeight);
			FindFingertip();
		}

		if (g_haveImage)
		{
			const XnRGB24Pixel* pImageMap = g_image.GetRGB24ImageMap();
			ProcessImageFrame(pImageMap, g_depthWidth, g_depthHeight);
		}



		ShowFrame();

		CheckKeys();
	}
}
void glut_display() {
	xn::DepthMetaData pDepthMapMD;
	xn::ImageMetaData pImageMapMD;
#ifdef DEBUGOUT
	ofstream datei;
#endif

	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

	glMatrixMode(GL_PROJECTION);
	glPushMatrix();
	glLoadIdentity();
	gluPerspective(45, WINDOW_SIZE_X/WINDOW_SIZE_Y, 1000, 5000);
//	glOrtho(0, WINDOW_SIZE_X, WINDOW_SIZE_Y, 0, -128, 128);

	glMatrixMode(GL_TEXTURE);
	glLoadIdentity();
//	glTranslatef(-12.8/640.0, 9.0/480.0, 0);
//	glTranslatef(-12.8/630.0, 9.0/480.0,0);
	glScalef(scalex, scaley, 1.0);
	glTranslatef(transx/630, transy/480, 0.0);

	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
	
	rot_angle+=0.7;

	// Warten auf neue Daten vom Tiefengenerator
	nRetVal = context.WaitAndUpdateAll();
	checkError("Fehler beim Aktualisieren der Daten", nRetVal);

	// Aktuelle Depth Metadaten auslesen
	depth.GetMetaData(pDepthMapMD);
	// Aktuelle Depthmap auslesen
	const XnDepthPixel* pDepthMap = depth.GetDepthMap();

	if(maxdepth==-1)
		maxdepth = getMaxDepth(pDepthMap);

	// Aktuelle Image Metadaten auslesen 
	image.GetMetaData(pImageMapMD);
	//Aktuelles Bild auslesen
	const XnRGB24Pixel* pImageMap = image.GetRGB24ImageMap();

	glColor3f(1, 1, 1);
//	XnDepthPixel maxdepth = depth.GetDeviceMaxDepth();
	const unsigned int xres = pDepthMapMD.XRes();
	const unsigned int yres = pDepthMapMD.YRes();

#ifdef DEBUGOUT
	datei.open("daniel.txt", ios::out);
#endif

	for(unsigned int y=0; y<yres-1; y++) {
		for(unsigned int x=0; x<xres; x++) {
			aDepthMap[x+y*xres] = static_cast<GLubyte>(static_cast<float>(pDepthMap[x+y*xres])/static_cast<float>(maxdepth)*255);
		}
	}

	/*
	glEnable(GL_TEXTURE_2D);
	glPushMatrix();
	glLoadIdentity();
	glTranslatef(-800, 0, -2000);
	glBindTexture(GL_TEXTURE_2D, texture_rgb);
	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 640, 480, 0, GL_RGB, GL_UNSIGNED_BYTE, pImageMap);
	glBegin(GL_QUADS);
		glTexCoord2f(0,1); glVertex3f(0,0,0);
		glTexCoord2f(1,1); glVertex3f(640,0,0);
		glTexCoord2f(1,0); glVertex3f(640,480,0);
		glTexCoord2f(0,0); glVertex3f(0,480,0);
	glEnd();
	glPopMatrix();

	glPushMatrix();
	glLoadIdentity();
	glTranslatef(-800, 600, -2000);
	glBindTexture(GL_TEXTURE_2D, texture_depth);
	glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE8, 640, 480, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, aDepthMap);
	glBegin(GL_QUADS);
		glTexCoord2f(0,1); glVertex3f(0,0,0);
		glTexCoord2f(1,1); glVertex3f(640,0,0);
		glTexCoord2f(1,0); glVertex3f(640,480,0);
		glTexCoord2f(0,0); glVertex3f(0,480,0);
	glEnd();
	glPopMatrix();*/

	glPushMatrix();
	glLoadIdentity();
	glTranslatef(-100, -100, -2000);
	glRotatef(cx,0,1,0);
	glRotatef(cy,1,0,0);
	glTranslatef(-320, -240, 1000);
	glEnable(GL_TEXTURE_2D);
	glBindTexture(GL_TEXTURE_2D, texture_rgb);
	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 640, 480, 0, GL_RGB, GL_UNSIGNED_BYTE, pImageMap);
	glBegin(GL_POINTS);
	for(unsigned int y=0; y<yres-1; y++) {
		for(unsigned int x=0; x<630; x++) {
			if(pDepthMap[x+y*xres]!=0) {
				glTexCoord2f(static_cast<float>(x)/static_cast<float>(630), static_cast<float>(y)/static_cast<float>(480)); 
				glVertex3f(x, (yres-y), -pDepthMap[x+y*xres]/2.00);
#ifdef DEBUGOUT
				datei << t_gamma[pDepthMap[x+y*xres]] << endl;
#endif
			}
		}
	}
	glEnd();
	glPopMatrix();
	glDisable(GL_TEXTURE_2D);
	glutSwapBuffers();
#ifdef DEBUGOUT
	datei.close();
	exit(-1);
#endif
}
Esempio n. 3
0
void start_kinect() {
    XnStatus nRetVal = XN_STATUS_OK;
    xn::EnumerationErrors errors;
    UsersCount = 0;

    const char *fn = NULL;
    if    (fileExists(SAMPLE_XML_PATH)) fn = SAMPLE_XML_PATH;
    else if (fileExists(SAMPLE_XML_PATH_LOCAL)) fn = SAMPLE_XML_PATH_LOCAL;
    else {
        printf("Could not find '%s' nor '%s'. Aborting.\n" , SAMPLE_XML_PATH, SAMPLE_XML_PATH_LOCAL);
        //return XN_STATUS_ERROR;
    }
    printf("Reading config from: '%s'\n", fn);

    nRetVal = g_Context.InitFromXmlFile(fn, g_scriptNode, &errors);
    if (nRetVal == XN_STATUS_NO_NODE_PRESENT)
    {
        XnChar strError[1024];
        errors.ToString(strError, 1024);
        printf("%s\n", strError);
        //return (nRetVal);
    }
    else if (nRetVal != XN_STATUS_OK)
    {
        printf("Open failed: %s\n", xnGetStatusString(nRetVal));
        //return (nRetVal);
    }

    nRetVal = g_Context.FindExistingNode(XN_NODE_TYPE_DEPTH, g_depth);      
    CHECK_RC(nRetVal,"No depth");
    
	  nRetVal = g_Context.FindExistingNode(XN_NODE_TYPE_IMAGE, g_image);      
    CHECK_RC(nRetVal,"No image");

    nRetVal = g_Context.FindExistingNode(XN_NODE_TYPE_USER, g_UserGenerator);
    if (nRetVal != XN_STATUS_OK)
    {
        nRetVal = g_UserGenerator.Create(g_Context);
        CHECK_RC(nRetVal, "Find user generator");
    }

    XnCallbackHandle hUserCallbacks, hCalibrationStart, hCalibrationComplete, hPoseDetected;
    if (!g_UserGenerator.IsCapabilitySupported(XN_CAPABILITY_SKELETON))
    {
        printf("Supplied user generator doesn't support skeleton\n");
        //return 1;
    }
    nRetVal = g_UserGenerator.RegisterUserCallbacks(User_NewUser, User_LostUser, NULL, hUserCallbacks);
    CHECK_RC(nRetVal, "Register to user callbacks");
    nRetVal = g_UserGenerator.GetSkeletonCap().RegisterToCalibrationStart(UserCalibration_CalibrationStart, NULL, hCalibrationStart);
    CHECK_RC(nRetVal, "Register to calibration start");
    nRetVal = g_UserGenerator.GetSkeletonCap().RegisterToCalibrationComplete(UserCalibration_CalibrationComplete, NULL, hCalibrationComplete);
    CHECK_RC(nRetVal, "Register to calibration complete");

    if (g_UserGenerator.GetSkeletonCap().NeedPoseForCalibration())
    {
        g_bNeedPose = TRUE;
        if (!g_UserGenerator.IsCapabilitySupported(XN_CAPABILITY_POSE_DETECTION))
        {
            printf("Pose required, but not supported\n");
            //return 1;
        }
        nRetVal = g_UserGenerator.GetPoseDetectionCap().RegisterToPoseDetected(UserPose_PoseDetected, NULL, hPoseDetected);
        CHECK_RC(nRetVal, "Register to Pose Detected");
        g_UserGenerator.GetSkeletonCap().GetCalibrationPose(g_strPose);
    }

    g_UserGenerator.GetSkeletonCap().SetSkeletonProfile(XN_SKEL_PROFILE_ALL);

    nRetVal = g_Context.StartGeneratingAll();
    CHECK_RC(nRetVal, "StartGenerating");

    XnUserID aUsers[MAX_NUM_USERS];
    XnUInt16 nUsers;

    XnSkeletonJointTransformation anyjoint;

    printf("Starting to run\n");
    if(g_bNeedPose)
    {
        printf("Assume calibration pose\n");
    }
    XnUInt32 epochTime = 0;
    while (!xnOSWasKeyboardHit())
    {
        g_Context.WaitOneUpdateAll(g_UserGenerator);
        // print the torso information for the first user already tracking
        nUsers=MAX_NUM_USERS;
        g_UserGenerator.GetUsers(aUsers, nUsers);
        int numTracked=0;
        int userToPrint=-1;

        WriteLock w_lock(myLock);
    	  pDepthMap = g_depth.GetDepthMap();
        pPixelMap = g_image.GetRGB24ImageMap();
            
    	  g_depth.GetMetaData(g_depthMD);    
        g_image.GetMetaData(g_imageMD);
        pPixelPoint = g_imageMD.RGB24Data();


        for(XnUInt16 i=0; i<nUsers; i++) {
    			if(g_UserGenerator.GetSkeletonCap().IsTracking(aUsers[i])==FALSE)
    				continue;
    			{
    				
    				
    				/* Writing all new movements into structure*/
    				/* Head */
    				g_UserGenerator.GetSkeletonCap().GetSkeletonJoint(aUsers[i],XN_SKEL_HEAD,anyjoint);
    				Skeletons[i]["Head"]["X"] = anyjoint.position.position.X;
    				Skeletons[i]["Head"]["Y"] = anyjoint.position.position.Y;
    				Skeletons[i]["Head"]["Z"] = anyjoint.position.position.Z;
    				/* Neck */
    				g_UserGenerator.GetSkeletonCap().GetSkeletonJoint(aUsers[i],XN_SKEL_NECK,anyjoint);
    				Skeletons[i]["Neck"]["X"] = anyjoint.position.position.X;
    				Skeletons[i]["Neck"]["Y"] = anyjoint.position.position.Y;
    				Skeletons[i]["Neck"]["Z"] = anyjoint.position.position.Z;
    				/* Left Shoulder */
    				g_UserGenerator.GetSkeletonCap().GetSkeletonJoint(aUsers[i],XN_SKEL_LEFT_SHOULDER,anyjoint);
    				Skeletons[i]["LeftShoulder"]["X"] = anyjoint.position.position.X;
    				Skeletons[i]["LeftShoulder"]["Y"] = anyjoint.position.position.Y;
    				Skeletons[i]["LeftShoulder"]["Z"] = anyjoint.position.position.Z;
    				/* Right Shoulder */
    				g_UserGenerator.GetSkeletonCap().GetSkeletonJoint(aUsers[i],XN_SKEL_RIGHT_SHOULDER,anyjoint);
    				Skeletons[i]["RightShoulder"]["X"] = anyjoint.position.position.X;
    				Skeletons[i]["RightShoulder"]["Y"] = anyjoint.position.position.Y;
    				Skeletons[i]["RightShoulder"]["Z"] = anyjoint.position.position.Z;
    				/* Torso */
    				g_UserGenerator.GetSkeletonCap().GetSkeletonJoint(aUsers[i],XN_SKEL_TORSO,anyjoint);
    				Skeletons[i]["Torso"]["X"] = anyjoint.position.position.X;
    				Skeletons[i]["Torso"]["Y"] = anyjoint.position.position.Y;
    				Skeletons[i]["Torso"]["Z"] = anyjoint.position.position.Z;
    				/* Left Elbow */
    				g_UserGenerator.GetSkeletonCap().GetSkeletonJoint(aUsers[i],XN_SKEL_LEFT_ELBOW,anyjoint);
    				Skeletons[i]["LeftElbow"]["X"] = anyjoint.position.position.X;
    				Skeletons[i]["LeftElbow"]["Y"] = anyjoint.position.position.Y;
    				Skeletons[i]["LeftElbow"]["Z"] = anyjoint.position.position.Z;
    				/* Right Elbow */
    				g_UserGenerator.GetSkeletonCap().GetSkeletonJoint(aUsers[i],XN_SKEL_RIGHT_ELBOW,anyjoint);
    				Skeletons[i]["RightElbow"]["X"] = anyjoint.position.position.X;
    				Skeletons[i]["RightElbow"]["Y"] = anyjoint.position.position.Y;
    				Skeletons[i]["RightElbow"]["Z"] = anyjoint.position.position.Z;
    				/* Left Hip */
    				g_UserGenerator.GetSkeletonCap().GetSkeletonJoint(aUsers[i],XN_SKEL_LEFT_HIP,anyjoint);
    				Skeletons[i]["LeftHip"]["X"] = anyjoint.position.position.X;
    				Skeletons[i]["LeftHip"]["Y"] = anyjoint.position.position.Y;
    				Skeletons[i]["LeftHip"]["Z"] = anyjoint.position.position.Z;
    				/* Right Hip */
    				g_UserGenerator.GetSkeletonCap().GetSkeletonJoint(aUsers[i],XN_SKEL_RIGHT_HIP,anyjoint);
    				Skeletons[i]["RightHip"]["X"] = anyjoint.position.position.X;
    				Skeletons[i]["RightHip"]["Y"] = anyjoint.position.position.Y;
    				Skeletons[i]["RightHip"]["Z"] = anyjoint.position.position.Z;
    				/* Left Hand */
    				g_UserGenerator.GetSkeletonCap().GetSkeletonJoint(aUsers[i],XN_SKEL_LEFT_HAND,anyjoint);
    				Skeletons[i]["LeftHand"]["X"] = anyjoint.position.position.X;
    				Skeletons[i]["LeftHand"]["Y"] = anyjoint.position.position.Y;
    				Skeletons[i]["LeftHand"]["Z"] = anyjoint.position.position.Z;
    				/* Right Hand */
    				g_UserGenerator.GetSkeletonCap().GetSkeletonJoint(aUsers[i],XN_SKEL_RIGHT_HAND,anyjoint);
    				Skeletons[i]["RightHand"]["X"] = anyjoint.position.position.X;
    				Skeletons[i]["RightHand"]["Y"] = anyjoint.position.position.Y;
    				Skeletons[i]["RightHand"]["Z"] = anyjoint.position.position.Z;
    				/* Left Knee */
    				g_UserGenerator.GetSkeletonCap().GetSkeletonJoint(aUsers[i],XN_SKEL_LEFT_KNEE,anyjoint);
    				Skeletons[i]["LeftKnee"]["X"] = anyjoint.position.position.X;
    				Skeletons[i]["LeftKnee"]["Y"] = anyjoint.position.position.Y;
    				Skeletons[i]["LeftKnee"]["Z"] = anyjoint.position.position.Z;
    				/* Right Knee */
    				g_UserGenerator.GetSkeletonCap().GetSkeletonJoint(aUsers[i],XN_SKEL_RIGHT_KNEE,anyjoint);
    				Skeletons[i]["RightKnee"]["X"] = anyjoint.position.position.X;
    				Skeletons[i]["RightKnee"]["Y"] = anyjoint.position.position.Y;
    				Skeletons[i]["RightKnee"]["Z"] = anyjoint.position.position.Z;
    				/* Left Foot */
    				g_UserGenerator.GetSkeletonCap().GetSkeletonJoint(aUsers[i],XN_SKEL_LEFT_FOOT,anyjoint);
    				Skeletons[i]["LeftFoot"]["X"] = anyjoint.position.position.X;
    				Skeletons[i]["LeftFoot"]["Y"] = anyjoint.position.position.Y;
    				Skeletons[i]["LeftFoot"]["Z"] = anyjoint.position.position.Z;
    				/* Right Foot */
    				g_UserGenerator.GetSkeletonCap().GetSkeletonJoint(aUsers[i],XN_SKEL_RIGHT_FOOT,anyjoint);
    				Skeletons[i]["RightFoot"]["X"] = anyjoint.position.position.X;
    				Skeletons[i]["RightFoot"]["Y"] = anyjoint.position.position.Y;
    				Skeletons[i]["RightFoot"]["Z"] = anyjoint.position.position.Z;
    
    				/*printf("user %d: head at (%6.2f,%6.2f,%6.2f)\n",aUsers[i],
                                                                      Skeletons[i]["Head"]["X"],
                                                                      Skeletons[i]["Head"]["Y"],
                                                                      Skeletons[i]["Head"]["Z"]);*/
    			}				
        }
        
    }
    g_scriptNode.Release();
    g_depth.Release();
    g_image.Release();
    g_UserGenerator.Release();
    g_Context.Release();
}
Esempio n. 4
0
int main() {

    const unsigned int nBackgroundTrain = 30;
    const unsigned short touchDepthMin = 10;
    const unsigned short touchDepthMax = 20;
    const unsigned int touchMinArea = 50;

    const bool localClientMode = true; // connect to a local client

    const double debugFrameMaxDepth = 4000; // maximal distance (in millimeters) for 8 bit debug depth frame quantization
    const char* windowName = "Debug";
    const char* colorWindowName = "image";
    const Scalar debugColor0(0, 0, 128);
    const Scalar debugColor1(255, 0, 0);
    const Scalar debugColor2(255, 255, 255);
    const Scalar debugColor3(0, 255, 255);
    const Scalar debugColor4(255, 0, 255);

    int xMin = 50;
    int xMax = 550;
    int yMin = 50;
    int yMax = 300;

    Mat1s depth(480, 640); // 16 bit depth (in millimeters)
    Mat1b depth8(480, 640); // 8 bit depth
    Mat3b rgb(480, 640); // 8 bit depth

    Mat3b debug(480, 640); // debug visualization

    Mat1s foreground(640, 480);
    Mat1b foreground8(640, 480);

    Mat1b touch(640, 480); // touch mask

    Mat1s background(480, 640);
    vector<Mat1s> buffer(nBackgroundTrain);

    IplImage * image = cvCreateImage(cvSize(640, 480), 8, 3);
    IplImage * convertedImage = cvCreateImage(cvSize(640, 480), 8, 3);

    initOpenNI("niConfig.xml");

    // TUIO server object
    TuioServer* tuio;
    if (localClientMode) {
        tuio = new TuioServer();
    } else {
        tuio = new TuioServer("192.168.0.2", 3333, false);
    }
    TuioTime time;

    namedWindow(colorWindowName);
    createTrackbar("xMin", colorWindowName, &xMin, 640);
    createTrackbar("xMax", colorWindowName, &xMax, 640);
    createTrackbar("yMin", colorWindowName, &yMin, 480);
    createTrackbar("yMax", colorWindowName, &yMax, 480);
    // create some sliders
    namedWindow(windowName);
    createTrackbar("xMin", windowName, &xMin, 640);
    createTrackbar("xMax", windowName, &xMax, 640);
    createTrackbar("yMin", windowName, &yMin, 480);
    createTrackbar("yMax", windowName, &yMax, 480);

    Keyboard * piano = new Keyboard();
    (*piano).initKeyMap();

    system("qjackctl &");
    sleep(4);
    JackByTheNotes * notesJack = new JackByTheNotes();
    notesJack->connect();
    sleep(2);
    system("sudo jack_connect Piano:Rubinstein system:playback_1 &");

    map<double, timeval> keys;

    // create background model (average depth)
    for (unsigned int i = 0; i < nBackgroundTrain; i++) {
        xnContext.WaitAndUpdateAll();
        depth.data = (uchar*) xnDepthGenerator.GetDepthMap();
        buffer[i] = depth;
    }
    average(buffer, background);

    while (waitKey(1) != 27) {
        // read available data
        xnContext.WaitAndUpdateAll();

        // update 16 bit depth matrix
        depth.data = (uchar*) xnDepthGenerator.GetDepthMap();
        //xnImgeGenertor.GetGrayscale8ImageMap()

        XnRGB24Pixel* xnRgb =
            const_cast<XnRGB24Pixel*>(xnImgeGenertor.GetRGB24ImageMap());
        //		IplImage * image = cvCreateImage(cvSize(640, 480), 8, 3);
        //		IplImage * convertedImage = cvCreateImage(cvSize(640, 480), 8, 3);
        cvSetData		(image, xnRgb, 640 * 3);
        cvConvertImage(image, convertedImage, CV_CVTIMG_SWAP_RB);
        bool color = true;
        rgb = convertedImage;
        //		cvtColor(rgb,rgb,CV_RGB2BGR);
        // update rgb image
        //		rgb.data = (uchar*) xnImgeGenertor.GetRGB24ImageMap(); // segmentation fault here
        //		cvCvtColor(rgb, rgb, CV_BGR2RGB);

        // extract foreground by simple subtraction of very basic background model
        foreground = background - depth;

        // find touch mask by thresholding (points that are close to background = touch points)
        touch = (foreground > touchDepthMin) & (foreground < touchDepthMax);

        // extract ROI
        Rect roi(xMin, yMin, xMax - xMin, yMax - yMin);
        Mat touchRoi = touch(roi);

        // find touch points
        vector<vector<Point2i> > contours;
        vector<Point2f> touchPoints;
        findContours(touchRoi, contours, CV_RETR_LIST, CV_CHAIN_APPROX_SIMPLE,
                     Point2i(xMin, yMin));
        for (unsigned int i = 0; i < contours.size(); i++) {
            Mat contourMat(contours[i]);
            // find touch points by area thresholding
            if (contourArea(contourMat) > touchMinArea) {
                Scalar center = mean(contourMat);
                Point2i touchPoint(center[0], center[1]);
                touchPoints.push_back(touchPoint);
            }
        }

        // send TUIO cursors
        time = TuioTime::getSessionTime();
        tuio->initFrame(time);

        for (unsigned int i = 0; i < touchPoints.size(); i++) { // touch points
            float cursorX = (touchPoints[i].x - xMin) / (xMax - xMin);
            float cursorY = 1 - (touchPoints[i].y - yMin) / (yMax - yMin);
            TuioCursor* cursor = tuio->getClosestTuioCursor(cursorX, cursorY);
            // TODO improve tracking (don't move cursors away, that might be closer to another touch point)
            if (cursor == NULL || cursor->getTuioTime() == time) {
                tuio->addTuioCursor(cursorX, cursorY);
            } else {
                tuio->updateTuioCursor(cursor, cursorX, cursorY);
            }
        }

        tuio->stopUntouchedMovingCursors();
        tuio->removeUntouchedStoppedCursors();
        tuio->commitFrame();

        // draw debug frame
        depth.convertTo(depth8, CV_8U, 255 / debugFrameMaxDepth); // render depth to debug frame
        cvtColor(depth8, debug, CV_GRAY2BGR);
        debug.setTo(debugColor0, touch); // touch mask
        rectangle(debug, roi, debugColor1, 2); // surface boundaries
        if (color)
            rectangle(rgb, roi, debugColor1, 2); // surface boundaries

        // draw 10 white keys within the roi
        int stride = (xMax - xMin) / 10;
        for (int keys = 1; keys < 10; keys++) {
            Point lower(xMin + keys * stride, yMax);
            if (keys == 3 || keys == 7) {
                Point upper(xMin + keys * stride, yMin);
                line(debug, upper, lower, debugColor3, 2, 0);
                if (color)
                    line(rgb, upper, lower, debugColor3, 2, 0);
                continue;
            } else {
                Point upper(xMin + keys * stride, (yMin + yMax) / 2);
                line(debug, upper, lower, debugColor3, 2, 0);
                if (color)
                    line(rgb, upper, lower, debugColor3, 2, 0);
            }
            Point blkUpper(xMin + keys * stride - stride / 3, yMin);
            Point blkLower(xMin + keys * stride + stride / 3,
                           (yMin + yMax) / 2);
            rectangle(debug, blkUpper, blkLower, debugColor4, 2);
            if (color)
                rectangle(rgb, blkUpper, blkLower, debugColor4, 2);
        }

        for (unsigned int i = 0; i < touchPoints.size(); i++) { // touch points
            circle(debug, touchPoints[i], 5, debugColor2, CV_FILLED);
            if (color)
                circle(rgb, touchPoints[i], 5, debugColor2, CV_FILLED);
            double frequency = piano->keyFrequency(touchPoints[i].y - 50,
                                                   touchPoints[i].x - 50);

            cout << frequency << " " << touchPoints[i].y - 50 << " "
                 << touchPoints[i].x - 50 << endl;

            if (keys.find(frequency) == keys.end()) {
                Note * note = new Note(frequency, 2, 4000);
                notesJack->playNote(*note);
                timeval now;
                gettimeofday(&now, NULL);
                keys[frequency] = now;
            } else {
                timeval now;
                gettimeofday(&now, NULL);
                if ((now.tv_sec - keys[frequency].tv_sec) * 1000
                        + (now.tv_usec - keys[frequency].tv_usec) / 1000
                        > 1000) {
                    Note * note = new Note(frequency, 2, 4000);
                    notesJack->playNote(*note);
                    keys[frequency] = now;
                }
            }
        }
        // render debug frame (with sliders)
//		IplImage grayScale = debug;
//		cvFlip(&grayScale, NULL, 1);
//		Mat gray(&grayScale);
//		imshow(windowName, gray);
//
//		IplImage colorful = rgb;
//		cvFlip(&colorful, NULL, 1);
//		Mat real(&colorful);
//		imshow("image", real);
        imshow(windowName, debug);
        imshow("image", rgb);
        //		cvShowImage("image", image);
    }

    return 0;
}