[HN Gopher] Page Dewarping (2016)
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       Page Dewarping (2016)
        
       Author : Tomte
       Score  : 59 points
       Date   : 2024-05-12 17:33 UTC (5 hours ago)
        
 (HTM) web link (mzucker.github.io)
 (TXT) w3m dump (mzucker.github.io)
        
       | m000 wrote:
       | It's 2024. Why my freaking document scanner app still doesn't
       | have this built-in?
        
         | Animats wrote:
         | This is very nice. Having a low-dimension page warping model to
         | optimize seems to be what makes this work.
         | 
         | This is a good YC-sized problem - weeks to market, a few
         | hundred thousand dollars to launch. Apple has a phone app for
         | this which requires too much manual adjustment, and Microsoft
         | has Office Lens / Microsoft Lens, which has comments such as
         | "The edges just eventually go crazy and look horrendous". So
         | there's a market for one that Just Works. Exit by selling to
         | the usual suspects.
        
           | coderatlarge wrote:
           | I've scanned probably thousands of pages with ms lens over
           | the years and it works quite reliably in my experience, at
           | least on iPhone.
        
         | solardev wrote:
         | We use GeniusScan at school and it does that:
         | https://blog.thegrizzlylabs.com/2024/03/genius-
         | scan-7.16.htm....
        
         | undershirt wrote:
         | vflat is good for this
        
         | lelandfe wrote:
         | I wonder if the new iPad Pro does this when taking photos of
         | documents. Apple's demo of the new adaptive flash showed a
         | document on a table being photographed, and the resulting photo
         | is flat. Curious to see how it fares with a curled page.
         | 
         | Here's the only press shot I could find:
         | https://www.apple.com/newsroom/images/2024/05/apple-unveils-...
        
       | int0x29 wrote:
       | I ran into a different issue while trying to make an app to scan
       | color coded notes in college. The colors skewed from the top to
       | the bottom of the page making it hard to reliably tell blue pens
       | from green ones. At some point I should look at it again.
        
       | LegionMammal978 wrote:
       | I'd be wary of applying such a harsh threshold to the output as
       | the author has done here. It appears to capture the page well
       | enough for most text, but I have seen many pages from Google
       | Books where the threshold has mutilated illustrations or small
       | footnotes to the point of making them unreadable. And if the
       | Google Books scan is the only one available, you're completely
       | out of luck.
        
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       (page generated 2024-05-12 23:00 UTC)