np array tolist and back

[anthares]

Hi everyone,

I am pretty new to Python and I am seeking some help and guidance.

I use OpenCV to grab frames from video cap:

ret, frame = self.cap.read()

frame.shape here is (480,640,3)

For subsequent processing, I need to serialize the value in order to pass it on to remote consumers:

data = np.fromstring(frame, np.uint8)
message = data.tolist()

On the other end, I am trying to reverse that:

frame = np.array(incoming_message, dtype=np.uint8)
cv2.imwrite('debug.jpg', frame)

but clearly, it is not the right way to do it.
How should I proceed to obtain the original nparray so that I can save it as an image?

Please, advise.

Thanks in advance!
Cheers,
G

[buran]

maybe numpy.reshape
https://numpy.org/doc/1.18/reference/gen...shape.html

[anthares]

Man! you are saving me so much time! :)

Thanks so much!!

...

frame = np.array(incoming_message, dtype=np.uint8)
reshaped_frame = frame.reshape((480, 640, 3))
cv2.imwrite('debug.jpg', reshaped_frame)

...

Cheers,
G.