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Date Posted: 21:27:32 12/12/02 Thu
Author: Michel
Subject: Re: Auto-Crop - How to?
In reply to: Mark 's message, "Auto-Crop - How to?" on 19:24:40 12/09/02 Mon

Hi Mark,

No I don't have anything on that, but you will need to somehow guess by looking at individual pixels if an area of a page has content or is blank. A simple statistical gathering of white/black pixels may do.

Best regards,


>I just started using the Envision library (great!) to
>essentially develop an application similar to
>PaperPort that works they way I want it to since I
>don't like the latest version and my old Visioneer
>scanners are about to give out. One thing the
>original Visioneer scanner/PaperPort combination did
>was to auto-straighten (I'm using the nblib for that)
>and to auto-crop... so when I scan smaller pages, like
>receipts, I don't have to go in and select and then
>crop them down from the surrounding black area. If
>anyone has an idea to get me started about how to
>implement this I would be very appreciative.
>- Mark

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