cv2学习011. 在jupyter notebook中下载cv2包方法：打开一个jupyter notebook界面，直接输入pip install opencv-python命令2. 示例代码1import cv2img = cv2.imread('test.jpg')#读取图像文件b, g ,r =cv2.split(img)#读入通道顺序为b,g,rmerge = cv2.merge([b