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如上图：

//10*7的棋盘格：每行有10个角点，每列有7个角点

//每个棋盘格定为：30*30个像素，图像大小为330*240

//10*7的棋盘格：每行有10个角点，每列有7个角点
//每个棋盘格定为：30*30个像素，图像大小为330*240
void  createCheckerBoard()
{
	    cv::Mat frame = cv::Mat::zeros(240, 330, CV_8UC1);  

		int nc = frame.channels();

		int nWidthOfROI = 30;

		for (int j = 0; j<frame.rows; j++)
		{
			uchar* data = frame.ptr<uchar>(j);
			for (int i = 0; i<frame.cols*nc; i += nc)
			{
				if ((i / nc / nWidthOfROI + j / nWidthOfROI) % 2)
				{
					// bgr  
					data[i / nc*nc + 0] = 255;
					//data[i / nc*nc + 1] = 255;
					//data[i / nc*nc + 2] = 255;
				}
			}
		}

		imwrite("xx_base.jpg", frame);
		return;
}