How can I read an image from an Internet URL in Python cv2?
This Stack Overflow answer,
import cv2.cv as cv
import urllib2
from cStringIO import StringIO
import PIL.Image as pil
url="some_url"
img_file = urllib2.urlopen(url)
im = StringIO(img_file.read())
is not good because Python reported to me:
TypeError: object.__new__(cStringIO.StringI) is not safe, use cStringIO.StringI.__new__
Since a cv2 image is not a string (save a Unicode one, yucc), but a NumPy array, - use cv2 and NumPy to achieve it:
import cv2
import urllib
import numpy as np
req = urllib.urlopen('http://answers.opencv.org/upfiles/logo_2.png')
arr = np.asarray(bytearray(req.read()), dtype=np.uint8)
img = cv2.imdecode(arr, -1) # 'Load it as it is'
cv2.imshow('lalala', img)
if cv2.waitKey() & 0xff == 27: quit()