2-8 案例3：不同图片质量保存

import cv2
img = cv2.imread('image0.jpg',1)
cv2.imwrite('imageTest.jpg',img,[cv2.IMWRITE_JPEG_QUALITY,0])

import cv2
img = cv2.imread('image0.jpg',1)
cv2.imwrite('imageTest.jpg',img,[cv2.IMWRITE_JPEG_QUALITY,50])
#1MB 100KB 10KB

import cv2
img = cv2.imread('image0.jpg',1)
cv2.imwrite('imageTest.jpg',img,[cv2.IMWRITE_JPEG_QUALITY,50])
#1MB 100KB 10KB 0-100 有损压缩