Get picture information
import cv2 as cv
img = cv.imread('girl.jpg')
imginfo = img.shape
print(imginfo)
height = imginfo[0]
width = imginfo[1]
mode = imginfo[2] #此图片mode值为3，代表一个像素点由3中颜色组成
Compress Pictures
import cv2
img = cv.imread('girl.jpg')
imginfo = img.shape
print(imginfo)
height = imginfo[0]
width = imginfo[1]
mode = imginfo[2] #此图片mode值为3，代表一个像素点由3中颜色组成
datheight = int(height*0.5)
datwidth = int(width*0.5)
datimg = cv.resize(img, (datwidth, datheight))
cv2.imshow('image', datimg)
cv.waitKey()
