I'm on Chapter 1 of Solem's book. The following function definition needs to be added to imtools.py: [I did paste this I think in my first email].
import os from numpy import * def histeq(im,nbr_bins=256): """ Histogram equalization of a grayscale image. """ # get image histogram imhist,bins = histogram(im.flatten(),nbr_bins,normed=True) cdf = imhist.cumsum() # cumulative distribution function cdf = 255 * cdf / cdf[-1] # normalize # use linear interpolation of cdf to find new pixel values im2 = interp(im.flatten(),bins[:-1],cdf) return im2.reshape(im.shape), cdf Now this file is saved as imtools.py in my main C:\Python27 folder. In IDLE, I'm supposed to write: from PIL import Image from numpy import * im = array(Image.open(’AquaTermi_lowcontrast.jpg’).convert(’L’)) im2,cdf = imtools.histeq(im) That's it. That's the code I'm using. But it's giving me that error that "histogram" is not found. Er, I just checked the numpy version I have downloaded. It indeed doesn't have any histogram (although its documentation says it should :s). Sorry. I had checked the documentation first (and thought that this version contains histogram). I think the function histogram is not defined in numpy at all. It's in something called "mahotas" (No idea what that is). Thanks all for the help.
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