opencv彩色RGB图到灰度图的转化，分别在独立窗口显示-opencv color RGB to grayscale conversion plans were displayed in a separate window

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