How to convert image file object to numpy array in with openCv python?

If you effectively have the contents of a JPEG/PNG file in your variable called response, I think you can do:

frame = cv2.imdecode(response)

Or, you may need to do:

frame = cv2.imdecode(np.fromstring(response, np.uint8), cv2.IMREAD_COLOR)

Failing that, another way is like this:

from io import BytesIOfrom scipy import miscframe = misc.imread(BytesIO(response))

python numpy opencv flask

If the file is in read-byte mode (which means mode='rb') in your case, then numpy.frombuffer() also works, for example :

file = request.files['fileName']frame = cv2.imdecode(np.frombuffer(file.read(), numpy.uint8), cv2.IMREAD_COLOR)

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