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import time import cv2 import numpy as np import requests path='d:/guo.jpg' # img=cv2.imread(path) # x = img.tobytes() # # 从二进制文件到图片(numpy.ndarray): # # aaa=np.fromstring(x, np.uint8) # img = cv2.imdecode(aaa ,cv2.IMREAD_COLOR) # # cv2.imshow("1",img) # cv2.waitKeyEx() # import cv2 # opencv-python (3.4.2.16) # import numpy as np # numpy (1.14.5) #每一张图片需要600ms for i in range(10): start=time.time() file = requests.get("https://www.baidu.com/img/bd_logo1.png") img = cv2.imdecode(np.fromstring(file.content, np.uint8), 1) #file.content 是读取的远程文件的字节流 print('time',time.time()-start) cv2.imshow("1",img) cv2.waitKeyEx() #需要1000ms左右 for i in range(10): start=time.time() # file = requests.get("https://www.baidu.com/img/bd_logo1.png") url = 'http://i5.qhimg.com/t019c3e49c9c9319c33.jpg' url = 'https://www.baidu.com/img/bd_logo1.png' cap = cv2.VideoCapture(url) ret = cap.isOpened() while (ret): ret, img = cap.read() if not ret: break # img = cv2.imdecode(np.fromstring(file.content, np.uint8), 1) #file.content 是读取的远程文件的字节流 print('time',time.time()-start) cv2.imshow('photo', img) cv2.waitKey(0)