Re: [Gimp-user] How to flatten images of book page

[Mario Valle <mvalle cscs ch>]

Fantastic! Thanks
The only addition is to run perspective tool afterwards to correct side 
parallelism.
Thanks again!
                        mario

On 21-Mar-13 17:17, Rob Antonishen wrote:
> I wrote a plugin to correct such distortion by drawing two paths:
> http://registry.gimp.org/node/19214
>
> Here is a sample I ran on the page you provided:
> http://www.majhost.com/gallery/ffaat/gimp/more2/corrected.jpg
>
> I had to use it twice, once to correct the horizontal page bending, and
> once to correct the camera barreling after rotating the image.
>
>
> -Rob A>
>
>
>
>
> On Thu, Mar 21, 2013 at 11:35 AM, Mario Valle <mvalle cscs ch
> <mailto:mvalle cscs ch>> wrote:
>
>     The new cage tool is fantastic to solve the following problem, but I
>     need suggestions how to be more effective.
>
>     I take a photo with the smartphone of a book page. I need two hands
>     for this. The page does not lies flat (see
>     https://dl.dropbox.com/u/__2571325/before.jpg
>     <https://dl.dropbox.com/u/2571325/before.jpg>) because no more hands
>     available to keep the page flat (and no glass sheet at hand...).
>     Using the cage tool with 3 nodes above and 3 below the text produces
>     an acceptable result (see
>     https://dl.dropbox.com/u/__2571325/after.jpg
>     <https://dl.dropbox.com/u/2571325/after.jpg>).
>
>     Question: Is there any better method? Any GIMP plugin or even
>     Android app to solve this problem?
>
>     I can trace the deformed rectangle that enclose the page text, but
>     then I don't know how to pass this info to the cage tool and ask to
>     make it a real rectangle.
>
>     Thanks for your help!
>                                      mario
>
>     --
>     Ing. Mario Valle
>     Swiss National Supercomputing Centre (CSCS) | http://mariovalle.name/
>     v. Trevano 131, 6900 Lugano, Switzerland    | Tel: +41 (91)
>     610.82.60 <tel:%2B41%20%2891%29%20610.82.60>
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--
Ing. Mario Valle
Swiss National Supercomputing Centre (CSCS) | http://mariovalle.name/
v. Trevano 131, 6900 Lugano, Switzerland    | Tel: +41 (91) 610.82.60