How to read raw png from an array in python opencv?

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I'm streaming a png image from my iPhone to my MacBook over tcp. The MacBook code is from http://docs.python.org/library/socketserver.html#requesthandler-objects. How can the image be converted for use with OpenCV? A png was selected because they are efficient, but other formats could be used.

I wrote a test program that reads the rawImage from a file, but not sure how to convert it: 

# Read rawImage from a file, but in reality will have it from TCPServer
f = open('frame.png', "rb")
rawImage = f.read()
f.close()

# Not sure how to convert rawImage
npImage = np.array(rawImage)
matImage = cv2.imdecode(rawImage, 1)

#show it
cv.NamedWindow('display')
cv.MoveWindow('display', 10, 10)
cv.ShowImage('display', matImage)
cv. WaitKey(0)
png opencv python
6 Answers

This works for me (these days):

import cv2
import numpy as np

data = open('016e263c726a.raw').read()
x = np.frombuffer(data, dtype='uint8').reshape(2048,2448)
cv2.imshow('x',x); cv2.waitKey(); cv2.destroyAllWindows()

But it reads a RAW image saved without any specific format.

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