#include <highgui.h> 
#include <cxcore.h> 
#include <cv.h> 
#include <iostream> 
#include <string.h> 
#include <stdio.h> 
int main (void) 
{ 
unsigned char Red, Green, Blue; 
int CounterX, CounterY; 
IplImage *src; 
char name [255]="c:\\lena.png"; //questa l'immagine che carico 
cvNamedWindow("window src",CV_WINDOW_AUTOSIZE); 
src=cvLoadImage(name,1); 
for (CounterY=0; CounterY<src->height; CounterY++) 
{ 
for (CounterX=0; CounterX<src->width; CounterX++) 
{ 
Red = *((unsigned char*)(src->imageData + src->widthStep*CounterY) + 3*CounterX + 2); Green = *((unsigned char*)(src->imageData + src->widthStep*CounterY) + 3* (CounterX) + 1); 
Blue = *((unsigned char*)(src->imageData + src->widthStep*CounterY) + 3*CounterX + 0);
 } 
cvShowImage("window src", src); 
 cvWaitKey (0);
 cvDestroyWindow("window src"); 
cvReleaseImage (&src); }

struct colorRGB 
{
 float red; 
float green;
 float blue; 
};
 void PixelFeature::RgbtoYCrCb 
{ 
unsigned char Red, Green, Blue; 
int CounterX, CounterY, i; 
IplImage *src; 
char name [255]="c:\\lena.png"; 
cvNamedWindow("window src",CV_WINDOW_AUTOSIZE); 
Red = *((unsigned char*)(src->imageData + src->widthStep*CounterY) + 3*CounterX + 2); Green = *((unsigned char*)(src->imageData + src->widthStep*CounterY) + 3*CounterX + 1); 
Blue = *((unsigned char*)(src->imageData + src->widthStep*CounterY) + 3*CounterX + 0); 
for 
(int i=0; i<(src->height*src->width)-1; i++) 
{ 
colorRGB element; 
element.red = Red;  
element.green = Green; 
element.blue = Blue; 
image.push_back(element); 
}