opencv 图像上画矩形框

1.Mat src = imread(“0225_(956,1864)(1756,2047).jpg”);//输入图像 2.Rect rect(fnl_rect1.at(0,0), fnl_rect1.at(0, 1), fnl_rect1.at(0, 2), fnl_rect1.at(0, 3));//左上坐标（x,y）和矩形的长(x)宽(y)//定义框的性质 3.cv::rectangle(s

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