OpenCV创建图像并显示图像的例子

# include "cv.h"

#include "cxcore.h"
#include "highgui.h"
#include <stdlib.h>

//包含需要用到的库文件
#pragma comment(lib, "cv.lib")
#pragma comment(lib, "cxcore.lib")
#pragma comment(lib, "highgui.lib")

//主函数开始
int main( int argc, char** argv )
{
IplImage *cvImg; //IplImage是OpenCV的底层图像指针
CvSize imgSize;
int i=0,j=0;
imgSize.width = 640;
imgSize.height = 480;
cvImg = cvCreateImage(imgSize,8,1); //，创建一个640*480的图像，深度为8，1通道RGB图像 
for(i=0;i<imgSize.width;i++)
for(j=0;j<imgSize.height;j++)
{

//对每个像素逐个赋值
((uchar*)(cvImg->imageData+cvImg->widthStep*j))[i]=(char)((i*j)%256);

}
cvNamedWindow("ShowImage...",1); //cvNamedWindow会创建一个显示窗口cvShowImage("ShowImage...",cvImg); //cvShowImage在窗口中显示创建的图像
cvWaitKey(0); //cvWaitKey等待用户按键
cvDestroyWindow("image"); //cvDestroyWindow关闭显示窗口
cvReleaseImage(&cvImg); //cvReleaseImage释放图像所占的内存

return 0;
}