Opencv Python display raw image

Question

I can't figure out how to display a raw image which contains 640x480 pixel information, each pixel 8 bit. (Gray image)

I need to go from an np array to Mat format to be able to display the image.

#!/usr/bin/python
import numpy as np
import cv2
import sys
# Load image as string from file/database    
fd = open('flight0000.raw')
img_str = fd.read()
fd.close()

img_array = np.asarray(bytearray(img_str), dtype=np.uint8)

img = ... Conversion to Mat graycolor

cv2.imshow('rawgrayimage', img)
cv2.waitKey(0)

It so confusing with the cv, cv2. I have been trying for a while now, but I can't find the solution.

Answer 1

.RAW files are not supported in OpenCV see imread,

But the file can be opened with Python and parsed with Numpy

import numpy as np
fd = open('flight0000.raw', 'rb')
rows = 480
cols = 640
f = np.fromfile(fd, dtype=np.uint8,count=rows*cols)
im = f.reshape((rows, cols)) #notice row, column format
fd.close()

This makes a numpy array that can be directly manipulated by OpenCV

import cv2
cv2.imshow('', im)
cv2.waitKey()
cv2.destroyAllWindows()