python下载图片

opencv需要9ms，

后面没有Image.open(bytes)，则比较快，也是8ms，否则，比较慢

start=time.time()
cap1 = cv2.VideoCapture(face_src)
ret1, img2 = cap1.read()
print('time1',time.time()-start)

start = time.time()
response = requests.get(face_src)
bytes = BytesIO(response.content)
# img=Image.open(bytes)
# img.show()
print('time2', time.time() - start)

 

还有一种方法：没试呢

image_data = io.BytesIO(urllibs.urlopen(url).read())