Using PIL to find separator pages

[Steve Holden]

Larry Bates wrote:
> I have a project that I wanted to solicit some advice
> on from this group.  I have millions of pages of scanned
> documents with each page in and individual .JPG file.
> When the documents were scanned the people that did
> the scanning put a colored (hot pink) separator page
> between the individual documents.  I was wondering if
> there was any way to utilize PIL to scan through the
> individual files, look at some small section on the
> page, and determine if it is a separator page by
> somehow comparing the color to the separator page
> color?  I realize that this would be some sort of
> percentage match where 100% would be a perfect match
> and any number lower would indicate that it was less
> likely that it was a coverpage.
> 
> Thanks in advance for any thoughts or advice.
> 
I suspect the easiest way would be to select a few small patches of each 
image and average the color values of the pixels, then normalize to hue 
rather than RGB.

Close enough to the hue you want (and you could include saturation and 
intensity too, if you felt like it) across several areas of the page 
would be a hit for a separator.

regards
  Steve
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