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Hello i create a program with OpenCv that dispaly video. the program is a consolea application hat lunch a window that show the video.
Now i want to display the video on a picturbox.
Could you help me please.
i work with c++/CLI

the code is here
#include <opencv\cv.h>
#include <opencv\highgui.h>
#include <Windows.h>

using namespace std;
using namespace cv;

const static int SENSITIVITY_VALUE = 40;                                        

const static int BLUR_SIZE = 20;                                               

int theObject[2] = { 0, 0 };

Rect objectBoundingRectangle = Rect(0, 0, 0, 0);

string intToString(int number){

	std::stringstream ss;
	ss << number;
	return ss.str();

void searchForMovement(Mat thresholdImage, Mat &cameraFeed){

	bool objectDetected = false;
	Mat temp;
	vector< vector<Point> > contours;
	vector<Vec4i> hierarchy;

	findContours(temp, contours, hierarchy, CV_RETR_EXTERNAL, CV_CHAIN_APPROX_SIMPLE);

	if (contours.size()>0)objectDetected = true;
	else objectDetected = false;

	if (objectDetected){

		vector< vector<Point> > largestContourVec;
		largestContourVec.push_back( - 1));
		objectBoundingRectangle = boundingRect(;
		int xpos = objectBoundingRectangle.x + objectBoundingRectangle.width / 2;
		int ypos = objectBoundingRectangle.y + objectBoundingRectangle.height / 2;

		theObject[0] = xpos, theObject[1] = ypos;

	int x = theObject[0];
	int y = theObject[1];

	circle(cameraFeed, Point(x, y), 30, Scalar(0, 255, 0), 2);  //******************30 IS THE SIZE OF THE CIRCLE
	line(cameraFeed, Point(x, y), Point(x, y - 30), Scalar(0, 255, 0), 2);  //**********30 IS THE SIZE OF THE CROSS HAIR
	line(cameraFeed, Point(x, y), Point(x, y + 30), Scalar(0, 255, 0), 2);
	line(cameraFeed, Point(x, y), Point(x - 30, y), Scalar(0, 255, 0), 2);
	line(cameraFeed, Point(x, y), Point(x + 30, y), Scalar(0, 255, 0), 2);
	putText(cameraFeed, "(" + intToString(x) + "," + intToString(y) + ")", Point(x, y), 1, 1, Scalar(255, 0, 0), 2);//*********MODIFIED

int main(){

	//some boolean variables for added functionality
	bool objectDetected = false;
	//these two can be toggled by pressing 'd' or 't'
	bool debugMode = false;
	bool trackingEnabled = false;
	//pause and resume code
	bool pause = false;
	//set up the matrices that we will need
	//the two frames we will be comparing
	Mat frame1, frame2;
	//their grayscale images (needed for absdiff() function)
	Mat grayImage1, grayImage2;
	//resulting difference image
	Mat differenceImage;
	//thresholded difference image (for use in findContours() function)
	Mat thresholdImage;
	//video capture object.
	VideoCapture capture;;    //0 = built-in, 1 = external

	if (!capture.isOpened()){
		return -1;

	while (1){

		//we can loop the video by re-opening the capture every time the video reaches its last frame

		//check if the video has reach its last frame.
		//we add '-1' because we are reading two frames from the video at a time.
		//if this is not included, we get a memory error!
		//read first frame;
		//convert frame1 to gray scale for frame differencing
		cv::cvtColor(frame1, grayImage1, COLOR_BGR2GRAY);
		//copy second frame;
		//convert frame2 to gray scale for frame differencing
		cv::cvtColor(frame2, grayImage2, COLOR_BGR2GRAY);
		//perform frame differencing with the sequential images. This will output an "intensity image"
		//do not confuse this with a threshold image, we will need to perform thresholding afterwards.
		cv::absdiff(grayImage1, grayImage2, differenceImage);
		//threshold intensity image at a given sensitivity value
		cv::threshold(differenceImage, thresholdImage, SENSITIVITY_VALUE, 255, THRESH_BINARY);
		if (debugMode == true){
			//show the difference image and threshold image
			cv::imshow("Difference Image", differenceImage);
			cv::imshow("Threshold Image", thresholdImage);
			//if not in debug mode, destroy the windows so we don't see them anymore
			cv::destroyWindow("Difference Image");
			cv::destroyWindow("Threshold Image");
		//use blur() to smooth the image, remove possible noise and
		//increase the size of the object we are trying to track. (Much like dilate and erode)
		cv::blur(thresholdImage, thresholdImage, cv::Size(BLUR_SIZE, BLUR_SIZE));
		//threshold again to obtain binary image from blur output
		cv::threshold(thresholdImage, thresholdImage, SENSITIVITY_VALUE, 255, THRESH_BINARY);
		if (debugMode == true){
			//show the threshold image after it's been "blurred"
			imshow("Final Threshold Image", thresholdImage);
		else {
			//if not in debug mode, destroy the windows so we don't see them anymore
			cv::destroyWindow("Final Threshold Image");

		//if tracking enabled, search for contours in our thresholded image
		if (trackingEnabled){
			searchForMovement(thresholdImage, frame1);

		//show our captured frame

		imshow("Frame1", frame1);

		//check to see if a button has been pressed.
		//this 10ms delay is necessary for proper operation of this program
		//if removed, frames will not have enough time to referesh and a blank 
		//image will appear.

		switch (waitKey(10)){                                   //*************MODIFIED

		case 27: //'esc' key has been pressed, exit program.
			return 0;
		case 116: //'t' has been pressed. this will toggle tracking
			trackingEnabled = !trackingEnabled;
			if (trackingEnabled == false) cout << "Tracking disabled." << endl;
			else cout << "Tracking enabled." << endl;
		case 100: //'d' has been pressed. this will debug mode
			debugMode = !debugMode;
			if (debugMode == false) cout << "Debug mode disabled." << endl;
			else cout << "Debug mode enabled." << endl;
		case 112: //'p' has been pressed. this will pause/resume the code.
			pause = !pause;
			if (pause == true){
				cout << "Code paused, press 'p' again to resume" << endl;
				while (pause == true){
					//stay in this loop until 
					switch (waitKey()){
						//a switch statement inside a switch statement? Mind blown.
					case 112:
						//change pause back to false
						pause = false;
						cout << "Code resumed." << endl;



	return 0;

Richard MacCutchan 31-Oct-15 5:06am    
Help with what?
Jammes_Ca 31-Oct-15 5:37am    
I want to display the video on a picturebox
sreeyush sudhakaran 1-Nov-15 1:28am    
Hi there is Visual studio Integration Tool for OpenCv
Jammes_Ca 1-Nov-15 7:07am    
Thanks but what you sent me, i did it, my question is how to display the video into a pictur box in a GUI.
not a console application.

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