opencv如何实现图片缩放与镜像

import cv2import numpy as np#打开原图img = cv2.imread("src.jpg", 1)cv2.imshow("src",img)#获取原图信息imgInfo = img.shapeheight = imgInfo[0]width  = imgInfo[1]deep   =  imgInfo[2]#图片大，镜像后太高屏幕显示不全，这里先缩放matScale = np.float32([[0.8,0,0], [0,0.8,0]])scale = cv2.warpAffine(img, matScale, (int(width*0.8), int(height*0.8)))  cv2.imshow("scale", scale)#重新获取缩放后的图片高与宽imgInfo = scale.shapeheight  = imgInfo[0]width   = imgInfo[1]#镜像的图片信息newImgInfo = (height * 2, width, deep)dest = np.zeros(newImgInfo, np.uint8)#镜像for i in range(0, height):    for j in range(0, width):        dest[i,j] = scale[i,j]        dest[height*2 - i -1, j] = scale[i, j]#画一个镜像与原图分割线        for i in range(0, width):    dest[height, i] = (0,0,255)cv2.imshow("dst", dest)cv2.waitKey(0)