Title: Color target tracking technology in OPENCV

Title: Color target tracking technology in OPENCV

Full code:

#include "opencv2/video/tracking.hpp" #include "opencv2/imgproc/imgproc.hpp" #include "opencv2/highgui/highgui.hpp"
#include <iostream> #include <ctype.h> using namespace CV;

using namespace Std;
Mat image;
BOOL Backprojmode = false;
BOOL SelectObject = false;
int trackobject = 0;
bool Showhist = true;
Point origin;
Rect selection;

int vmin = ten, Vmax = n, smin = 30;
		static void Onmouse (int event, int x, int y, int, void*) {if (SelectObject) {selection.x = MIN (x, origin.x);
		SELECTION.Y = MIN (y, ORIGIN.Y);
		Selection.width = Std::abs (x-origin.x);

		Selection.height = Std::abs (Y-ORIGIN.Y);
	Selection &= Rect (0, 0, Image.cols, image.rows);
		} switch (event) {Case Event_lbuttondown:origin = point (x, y);
		Selection = Rect (x, y, 0, 0);
		SelectObject = true;
	Break
		Case event_lbuttonup:selectobject = false;
		if (selection.width > 0 && selection.height > 0) trackobject = 1;
	Break }} static void Showhelptext () {cout << "\n\n\t This demo shows a tracking (tracking) technology based on mean drift \ n" "\ t use the mouse box to select a colored object and track it \ n"; cout << "\n\n\t: \ n" "\t\t initialize trace with the mouse box selected \ n" "\t\tesc-Exit program \ n" "\T\TC-stop tracking \ n" "\T\TB-on/off-projected view \ n" "\
T\th-Show/Hide-object histogram \ n "" \t\tp-pause video \ n ";  } const char* keys = {"{1| | 0 |

Camera number} "};

	int main (int argc, const char** argv) {showhelptext ();
	Videocapture cap;
	Rect Trackwindow;
	int hsize = 16;
	Float hranges[] = {0,180};

	Const float* phranges = hranges;

	Cap.open (0);
	if (!cap.isopened ()) {cout << "cannot initialize camera \ n";
	} namedwindow ("Histogram", 0);
	Namedwindow ("Camshift Demo", 0);
	Setmousecallback ("Camshift Demo", Onmouse, 0);
	Createtrackbar ("Vmin", "Camshift Demo", &vmin, 256, 0);
	Createtrackbar ("Vmax", "Camshift Demo", &vmax, 256, 0);

	Createtrackbar ("Smin", "Camshift Demo", &smin, 256, 0);
	Mat frame, HSV, hue, Mask, hist, histimg = Mat::zeros ($, +, CV_8UC3), backproj;

	BOOL paused = false;
	for (;;) {if (!paused) {cap >> frame;
		if (Frame.empty ()) break;

		} frame.copyto (image);

			if (!paused) {Cvtcolor (image, HSV, COLOR_BGR2HSV);

				if (trackobject) {int _vmin = vmin, _vmax = Vmax;
				InRange (HSV, scalar (0, smin, MIN (_vmin, _vmax)), scalar (n, N, MAX (_vmin, _vmax)), mask);
				int ch[] = {0, 0};
				Hue.create (Hsv.size (), hsv.depth ());

				Mixchannels (&AMP;HSV, 1, &hue, 1, CH, 1);
					if (Trackobject < 0) {Mat roi (hue, selection), Maskroi (mask, selection);
				
					Calchist (&roi, 1, 0, Maskroi, hist, 1, &hsize, &phranges);

					Normalize (hist, hist, 0, 255, Norm_minmax);
					Trackwindow = Selection;

					Trackobject = 1;
					histimg = Scalar::all (0);
					int binw = histimg.cols/hsize;
					Mat buf (1, hsize, CV_8UC3); for (int i = 0; i < hsize; i++) buf.at<vec3b> (i) = Vec3b (Saturate_cast<uchar> (i*180./hsize), 255, 2

					55);

					Cvtcolor (buf, buf, COLOR_HSV2BGR); for (int i = 0; i < HSIze
						i++) {int val = saturate_cast<int> (hist.at<float> (i) *histimg.rows/255); Rectangle (histimg, point (I*BINW, Histimg.rows), point ((i + 1) *binw, Histimg.rows-val), Scalar (buf.at<ve
					C3b> (i)),-1, 8);
				}} calcbackproject (&hue, 1, 0, Hist, backproj, &phranges);
				Backproj &= Mask; Rotatedrect Trackbox = Camshift (Backproj, Trackwindow, Termcriteria (termcriteria::eps |

				Termcriteria::count, 10, 1));
					if (Trackwindow.area () <= 1) {int cols = backproj.cols, rows = backproj.rows, r = (MIN (cols, rows) + 5)/6; Trackwindow = rect (Trackwindow.x-r, trackwindow.y-r, trackwindow.x + R, Trackwindow.y + R) & Rect
				(0, 0, cols, rows);

				} if (Backprojmode) Cvtcolor (backproj, image, COLOR_GRAY2BGR);
			
			Ellipse (image, Trackbox, Scalar (0, 0, 255), 3, LINE_AA);

		}} else if (Trackobject < 0) paused = false; if (SelectObject && selection.Width > 0 && selection.height > 0) {Mat ROI (image, selection);
		Bitwise_not (ROI, ROI);
		} imshow ("Camshift Demo", image);
		Imshow ("Histogram", histimg);//histogram char C = (char) waitkey (10);
		if (c = =) break;
			Switch (c) {case ' B ': Backprojmode =!backprojmode;
		Break
			Case ' C ': trackobject = 0;
			histimg = Scalar::all (0);
		Break
			Case ' h ': showhist =!showhist;
			if (!showhist) DestroyWindow ("histogram");
			else Namedwindow ("histogram", 1);
		Break
			Case ' P ': paused =!paused;
		Break
		Default:;
}} return 0; }

Operation effect: Cough, this is Bo master himself, not fond of light spray