measuring height of color using pixel. [closed]

edit

hi there,

i want to do detection using usb camera and the problem is that camera frame is not working fine means i can not get continue frame, i tried following code to detect the contour and draw rectangle around it.

#include "opencv/cv.h"
#include "opencv/highgui.h"
#include "opencv2/opencv.hpp"
#include "opencv2/core/core.hpp"
#include "opencv2/opencv.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"
#include "iostream"
#include "stdio.h"
#include "string"
#include <stdlib.h>

using namespace cv;
using namespace std;


int lowerH=168;
int upperH=256;

int lowerS=175;
int upperS=256;

int lowerV=0;
int upperV=256;   

IplImage* frame = 0 ;
IplImage* frame2 = 0 ;
IplImage* imgHSV = 0 ;
IplImage* imgThresh = 0 ;

vector<vector<Point> > contours;
vector<Vec4i> hierarchy;


void draw_conture(IplImage * temp)
{


   cv::Mat tempm(temp,true);  
   findContours( tempm , contours, hierarchy, CV_RETR_TREE, CV_CHAIN_APPROX_SIMPLE, cv::Point(0, 0) );           
   vector<vector<cv::Point> > contours_poly( contours.size() );
   vector<Rect> boundRect( contours.size() );
   vector<float>area( contours.size() );

   for(  int i = 0; i < contours.size(); i++ )
   {
      approxPolyDP( Mat(contours[i]), contours_poly[i], 3, true );
      boundRect[i] = boundingRect( Mat(contours_poly[i]) ) ;
      area[i]= contourArea(Mat(contours_poly[i]));

   }

   const CvScalar color=CV_RGB(0x00,0xFF,0x00);                        
   for( int i = 0; i< contours.size(); i++ )
   {                
     if (area[i]>1000)
         rectangle(tempm, boundRect[i].tl(), boundRect[i].br(), color, 1, 1, 0 );                                                      

   }


   CvSeq* contour;  //hold the pointer to a contour
   CvSeq* result;     //hold sequence of points of a contour
   CvMemStorage *storage = cvCreateMemStorage(0); //storage area for all contours

   cvFindContours(temp, storage, &contour, sizeof(CvContour), CV_RETR_LIST, CV_CHAIN_APPROX_SIMPLE, cvPoint(0,0));

   for (; contour != 0; contour = contour->h_next)
   {  
       result = cvApproxPoly(contour, sizeof(CvContour), storage, CV_POLY_APPROX_DP, cvContourPerimeter(contour)*0.02, 0);                
       CvRect rect = cvBoundingRect(contour, 0); //extract bounding box for current contour
       if( cvContourArea(result, CV_WHOLE_SEQ,0) >= 1000 )
       {
         cvDrawContours(frame, contour, CV_RGB(0,0,255), CV_RGB(0,0,255), 2, 1, 8, cvPoint(0, 0));
         frame2 = cvCreateImage(cvGetSize(frame), frame->depth, frame->nChannels);
         cvCopy(frame, frame2);
         cvRectangle(frame2, cvPoint(rect.x, rect.y), cvPoint(rect.x+rect.width, rect.y+rect.height), CV_RGB(0,0,255),2, 8, 0);  
         cout<< "height =" << rect.height <<endl;
         cout<< "width =" << rect.width <<endl;
         cout<< "x =" << rect.x <<endl;
         cout<< "y =" << rect.y <<endl;

       } 
   }  

   cvShowImage("Object Color Range", frame2);
}
#pragma region trackbar

void on_trackbar1(int position)
{   
    lowerH = position;       
    cvInRangeS(imgHSV, cvScalar(lowerH,lowerS,lowerV), cvScalar(upperH,upperS,upperV),imgThresh);
    cvShowImage("Object Detected", imgThresh);
    draw_conture(imgThresh);   
}

void on_trackbar2(int position)
{
    upperH = position;
    cvInRangeS(imgHSV, cvScalar(lowerH,lowerS,lowerV), cvScalar(upperH,upperS,upperV),imgThresh);
    cvShowImage("Object Detected", imgThresh);
    draw_conture(imgThresh);   
}

void on_trackbar3(int position)
{
    lowerS = position;   
    cvInRangeS(imgHSV, cvScalar(lowerH,lowerS,lowerV), cvScalar(upperH,upperS,upperV),imgThresh);
    cvShowImage("Object Detected", imgThresh);
    draw_conture(imgThresh);
}

void on_trackbar4(int position)
{
    upperS = position;   
    cvInRangeS(imgHSV, cvScalar(lowerH,lowerS,lowerV), cvScalar(upperH,upperS,upperV),imgThresh);
    cvShowImage("Object Detected", imgThresh);
    draw_conture(imgThresh);
}

void on_trackbar5(int position)
{
    lowerV = position;
    cvInRangeS(imgHSV, cvScalar(lowerH,lowerS,lowerV), cvScalar(upperH,upperS,upperV),imgThresh);
    cvShowImage("Object Detected", imgThresh);
    draw_conture(imgThresh);
}

void on_trackbar6(int position)
{
    upperV = position;
    cvInRangeS(imgHSV, cvScalar(lowerH,lowerS,lowerV), cvScalar(upperH ...