[Bug 189022] New: better guessing of proportions with 'inverse transformation' option

https://bugs.kde.org/show_bug.cgi?id=189022

           Summary: better guessing of proportions with 'inverse
                    transformation' option
           Product: digikamimageplugins
           Version: unspecified
          Platform: Compiled Sources
        OS/Version: Linux
            Status: NEW
          Severity: wishlist
          Priority: NOR
         Component: Perspective
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Version:            (using Devel)
Compiler:          gcc4.3.2
OS:                Linux
Installed from:    Compiled sources

New option 'inverse transformation' is very, very good thing for simple
perspective adjustments but has one bug: it badly guesses aspect ratio of
corrected fragment. With author's purpose of correcting paintings to get rid of
frames it isn't very important but if fails badly even with example presented
on his blog:

http://zwabel.wordpress.com/2009/04/06/kde-for-painters

Selected area is visibly rectangular but output is almost square. To correct
this user have to perform additional transformation with all - bad -
consequences for image quality.

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https://bugs.kde.org/show_bug.cgi?id=189022


Mikolaj Machowski <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|unspecified                 |0.11.0




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Mikolaj Machowski <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |WONTFIX




--- Comment #1 from Mikolaj Machowski <mikmach wp pl>  2009-04-07 21:30:45 ---
Authors response for this question on his blog:
"
Yes, it maybe could do a better job in this. But I think it’s not possible to
reliably guess the real proportion, because you never know whether what parts
of the proportion come from the perspective transformation, and what is part of
the image.
So it just takes the bounding-rect of the transformed version right now.
"

After more tests I have to agree. Closing. Sorry for noise.

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=189022


Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|0.11.0                      |1.0.0




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https://bugs.kde.org/show_bug.cgi?id=189022

[hidden email] changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Product|digikamimageplugins         |digikam
          Component|Perspective                 |Tool-Perspective

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