[digikam] [Bug 375142] New: The similarity calculated for the fuzzy image drop search is imprecise

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https://bugs.kde.org/show_bug.cgi?id=375142

            Bug ID: 375142
           Summary: The similarity calculated for the fuzzy image drop
                    search is imprecise
           Product: digikam
           Version: 5.5.0
          Platform: Compiled Sources
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Searches-Fuzzy
          Assignee: [hidden email]
          Reporter: [hidden email]
  Target Milestone: ---

When dropping an image from outside of the digiKam database into the fuzzy
search
while an identical image is present in digiKam, the similarity is not even near
100 % though it should be.

The problem seems to be some magic during loading the image as QImage. This
seems to reduce the precision.

This file is opened for reference.

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https://bugs.kde.org/show_bug.cgi?id=375142

Mario Frank <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|5.5.0                       |5.4.0

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https://bugs.kde.org/show_bug.cgi?id=375142

Mario Frank <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Latest Commit|                            |https://commits.kde.org/dig
                   |                            |ikam/c97ac972bff7914efd9420
                   |                            |2ef26eb2d5bfb8ff66
         Resolution|---                         |FIXED
             Status|UNCONFIRMED                 |RESOLVED
   Version Fixed In|                            |5.5.0

--- Comment #1 from Mario Frank <[hidden email]> ---
Git commit c97ac972bff7914efd94202ef26eb2d5bfb8ff66 by Mario Frank.
Committed on 16/01/2017 at 15:11.
Pushed by mfrank into branch 'master'.

Improved the exactness of fuzzy image drop search.
Some images which were present in DB and outside had only similarity of 98,13 %
though they were identical.
The problem seems to be that QImage does some transformations which reduce the
exactness.
Now the dropped external image is loaded as DImg which increases the similarity
of the specific pictures to 99,41 %.
This is still not perfect but far more precise.
FIXED-IN: 5.5.0

M  +4    -2    NEWS
M  +1    -6    libs/database/haar/haariface.cpp

https://commits.kde.org/digikam/c97ac972bff7914efd94202ef26eb2d5bfb8ff66

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