[Image-SIG] Image -> Array -> Image Problems

[Uffe Overgaard Koch]

I am doing (or trying to) some image analysis and object recognition on
some grabbed images. 
BUT: When I try to convert an image (PIL) into an array (NumPy), copy it
pixel by pixel, and convert the new array to an image it looks awkward.
It looks like it is skipping some pixels. What d I do wrong?

---EX:---
#!/usr/bin/python

import Image, Numeric
height = 240
width = 320


def ImageToArray(i): 
    a = Numeric.array(i.tostring(), "b") 
    a.shape = i.size[1], i.size[0] 
    return a 

def ArrayToImage(a): 
    i = Image.new("L", (a.shape[1], a.shape[0])) 
    i.fromstring(a.tostring()) 
    return i 

img = Image.open('cap.jpg','r')
img.show()
inarr = ImageToArray(img)

outarr = Numeric.zeros((height,width))

for y in range(1,height-1):
    for x in range(1,width-1):
	outarr[y][x] = inarr[y][x] 

imout = ArrayToImage(outarr)
imout.show()

---END EX---

/Uffe Koch
Aalborg University - Denmark