用OpenCV实现打开一幅彩色图像，显示出来； 将其转换为灰度图并保存为文件； 将其二值化并保存为文件-Using OpenCV open a color image displayed be converted to grayscale and saved as a file Second value and saved as a file

如何结合opencv打开一张图片；以及如何获取到vector中的Mat数据，捕获鼠标移动时，当前的坐标位置- How to combine opencv open a picture and how to get to the vector data in the Mat, capturing mouse movements, the current coordinate position