#include<iostream>
using namespace std;
#include<stdio.h>
#include <stdlib.h>
#include <math.h>
#include <cv.h>
#include <ctype.h>
#include "highgui.h"
int main( int argc , char** argv)
{
IplImage* frame;
IplImage * histImage;
float ranges[]={0,255};
float* Range[1]={&ranges[0]};
int Bin=256;
CvCapture* capture=cvCreateFileCapture("test.avi");
cvNamedWindow("Video",1);
cvNamedWindow( "Histogram", 1 );
cout<<capture<<endl;
if(capture==NULL)
{
cout<<"NO capture"<<endl;
return 1;
}
while(1)
{
frame=cvQueryFrame(capture);
if(!frame) break;
IplImage* R = cvCreateImage( cvGetSize(frame), 8, 1 );
IplImage* G = cvCreateImage( cvGetSize(frame), 8, 1 );
IplImage* B = cvCreateImage( cvGetSize(frame), 8, 1 );
IplImage* Grey=cvCreateImage(cvGetSize(frame),8,1);
cvCvtColor(frame, Grey, CV_BGR2GRAY);
cvCvtPixToPlane(frame,R,G,B,0);
CvHistogram* R_hist;
CvHistogram* G_hist;
CvHistogram* B_hist;
CvHistogram* Grey_hist;
R_hist= cvCreateHist( 1, &Bin, CV_HIST_ARRAY, Range);
G_hist= cvCreateHist( 1, &Bin, CV_HIST_ARRAY, Range);
B_hist= cvCreateHist( 1, &Bin, CV_HIST_ARRAY, Range);
Grey_hist= cvCreateHist( 1, &Bin, CV_HIST_ARRAY, Range);
cvCalcHist( &R, R_hist);
cvCalcHist( &G, G_hist);
cvCalcHist( &B, B_hist);
cvCalcHist( &Grey, Grey_hist);
histImage=cvCreateImage(cvSize(256,600),8,3);
histImage->origin = 1;
for(int i=0;i<Bin;i++)
{
cvLine(histImage,cvPoint(i,0),cvPoint(i,int(cvQueryHistValue_1D(R_hist,i)/50)),CV_RGB(i,0,0));
cvLine(histImage,cvPoint(i,150),cvPoint(i,int(cvQueryHistValue_1D(G_hist,i)/50)+150),CV_RGB(0,i,0));
cvLine(histImage,cvPoint(i,300),cvPoint(i,int(cvQueryHistValue_1D(B_hist,i)/50)+300),CV_RGB(0,0,i));
cvLine(histImage,cvPoint(i,450),cvPoint(i,int(cvQueryHistValue_1D(Grey_hist,i)/50)+450),CV_RGB(i,i,i));
}
cvShowImage("Video",frame);
cvShowImage( "Histogram", histImage );
char c=cvWaitKey(33);
if(c==27) break;
}
cvReleaseCapture(&capture);
cvReleaseImage(&frame);
cvReleaseImage(&histImage);
cvDestroyWindow("video");
cvDestroyWindow("Histogram");
return 1;
}
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