Creating Image

Create_Image

//Author: Kumar Krishna Agarwal
//Mail  : kumar.1994.14@gmail.com

#include <iostream>
#include <highgui.h>
#include <cv.h>


int main()
{
	IplImage* img;
	
	//Creating Image
	img=cvCreateImage(cvSize(400,400),IPL_DEPTH_8U,3);                    
	/*  cvCreateImage(cvSize(width,height),<depth stream>,<no. of channels>)  */

	CvScalar pixel,pix1,pix2;     //structure to store four values
	
	cvNamedWindow("window",0);

	int i,j
	;
	for(i=0;i<img->height/3;i++)
	{
		for(j=0;j<img->width;j++)
		{
			//Setting the values for Blue,Red and Green Stream 
			pixel.val[0]=255;                  //Blue
			pixel.val[1]=0;                    //Green
			pixel.val[2]=0;                    //Red

			cvSet2D(img,i,j,pixel);            //Set pixel
			/*cvSet2D(<image name>,<x coord>,<y coord>, <name of pixel>) */
		}
	}
	for(i=img->height/3;i<2*img->height/3;i++)
	{
		for(j=0;j<img->width;j++)
		{                  
			pixel.val[0]=0;
			pixel.val[1]=255;
			pixel.val[2]=0;

			cvSet2D(img,i,j,pixel);
		}
	}
	for(i=2*img->height/3;i<img->height;i++)
	{
		for(j=0;j<img->width;j++)
		{                  
			pixel.val[0]=0;
			pixel.val[1]=0;
			pixel.val[2]=255;

			cvSet2D(img,i,j,pixel);
		}
	}
	cvShowImage("window",img);   //Show Image
	cvWaitKey(3000);             //Wait Key (Default is keyStroke)
	cvReleaseImage(&img);        //Release image
	cvDestroyWindow("window");   //Destroy window
}