读取、访问、修改、显示、打印Mat对象
//读取图像
using var lenaA = Cv2.ImRead(ImagePath.LenaColor, ImreadModes.Color);
if (lenaA.Empty()) return;
//共享图像矩阵
var lenaB = new Mat(lenaA, Range.All, Range.All);
using var lenaC = lenaA;
//获取指定区域图像
using var lenaD = new Mat(lenaA, new Rect(100, 250,370, 180));
using var lenaE = lenaA[new Range(100, 200), Range.All];
//复制图像矩阵
using var lenaF = lenaA.Clone();
using Mat lenaG = new Mat();
lenaA.CopyTo(lenaG);
等等