[digikam] [Bug 376681] New: Region Coordinates Are Sometimes inf / Large Numbers

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https://bugs.kde.org/show_bug.cgi?id=376681

            Bug ID: 376681
           Summary: Region Coordinates Are Sometimes inf / Large Numbers
           Product: digikam
           Version: 5.5.0
          Platform: MS Windows
                OS: MS Windows
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Preview
          Assignee: [hidden email]
          Reporter: [hidden email]
  Target Milestone: ---

Created attachment 104115
  --> https://bugs.kde.org/attachment.cgi?id=104115&action=edit
Screenshot

About 30% of the time, after I draw the first face box (Jane) on an image, the
metadata region coordinates written to the image are infinity.

Then when I draw a second box (Jim), Jane 1 is corrected but Jane is then
repeated twice. Jane 2 and 3 coordinates are massive negative numbers.

Verification by another tool confirms it the metadata as inf.

See attached screenshots.

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--- Comment #1 from [hidden email] ---
Created attachment 104116
  --> https://bugs.kde.org/attachment.cgi?id=104116&action=edit
After Box 2 is drawn.

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           What    |Removed                     |Added
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 Attachment #104115|Screenshot                  |After Box 1 is drawn
        description|                            |

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--- Comment #2 from [hidden email] ---
If I clear the faces and try again, everything is normal.

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                 CC|                            |[hidden email]
          Component|Preview                     |Faces-Management

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--- Comment #3 from [hidden email] ---
This happens with 5.4.0 too.

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Yingjie Liu <[hidden email]> changed:

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--- Comment #4 from Yingjie Liu <[hidden email]> ---
Created attachment 104531
  --> https://bugs.kde.org/attachment.cgi?id=104531&action=edit
The metadata did not show

Hi，
Could you please tell me how to open the metadata region in the last two
attachment which shows the parameters about the region? After draw a face
region, I clicked metadata action in the right-side bar, but I did not find the
parameters about name and other parameters, show in this attachment. (Tracking
the code is a good way, I tracked it but the code is a bit huge......)

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--- Comment #5 from [hidden email] ---
On top of metadata viewer, you have a button to setup tags filters. turn on
all. Face tags are typically on XMP view.

Gilles Caulier

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--- Comment #6 from [hidden email] ---
FaceTags are managed in database here :

https://cgit.kde.org/digikam.git/tree/libs/database/tags

and stored in metadata by this method :

https://cgit.kde.org/digikam.git/tree/libs/dmetadata/dmetadata.cpp#n1659

Gilles Caulier

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--- Comment #7 from [hidden email] ---
The problem was first reported on the 15th Feb pre-release version of 5.5.0 and
then confirmed in 5.4.0.

I was using the 11-March build of 5.5.0 pre-release yesterday and the problem
did not happen. Maybe something was fixed by accident in this area in the March
build.

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--- Comment #8 from Yingjie Liu <[hidden email]> ---
Hi Gilles,
I set the filter as you said, click the tags filters, and turn on all in the
Views and Behavior, as shown in the Attachment "filter1" and "filter2".
Then I installed mysql for the db reading and writing.
But I met three problems.
The first is some pictures have XMP metadata (see attachment "has metadata", I
closed some filters in it, just left the useful ones), and some pictures have
no XMP and other metadata (see attachment "has no metadata").
The second problem is that the XMP metadata about face tags is unavaliable, as
shown in attachment "has metadata".
The third problem is that I installed 5.5.0 in windows, the "Last Keyword XMP"
will show the face tag's name after I draw the box and click "Album->Write
Metadata to Images", as shown in attachment "windows5.5.0 version". However, in
ubuntu, I compiled the latest code and installed the software, draw the box,
click "Album->Write Metadata to Images", the face tag's name still not shows in
"Last Keyword XMP" view, the attachment "has metadata" shows the result.

I read the method storing the metadata that you posted two days ago:

https://cgit.kde.org/digikam.git/tree/libs/dmetadata/dmetadata.cpp#n1659

This method add the metadata of "Area","Regions" and "Region List" to XMP view.
I found that the method is invoked by:

https://cgit.kde.org/digikam.git/tree/libs/fileactionmanager/metadatahub.cpp#n271

Then I debuged the program, and I found that the operations like create/modify
face tags, write/read metadata from database or write/read tags from database,
they all did not invoke the write method, therefore the setImageFacesMap can't
be executed, so the XMP view has no data.

I don't know whether I missed some configurations of the software, if so,
please indicate it for me. If there are some mistakes in my operations or I did
not see the right code, please indicate it too. Thanks.

Yingjie Liu

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--- Comment #9 from Yingjie Liu <[hidden email]> ---
Created attachment 104577
  --> https://bugs.kde.org/attachment.cgi?id=104577&action=edit
filter1

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--- Comment #10 from Yingjie Liu <[hidden email]> ---
Created attachment 104578
  --> https://bugs.kde.org/attachment.cgi?id=104578&action=edit
filter2

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--- Comment #11 from Yingjie Liu <[hidden email]> ---
Created attachment 104579
  --> https://bugs.kde.org/attachment.cgi?id=104579&action=edit
has metadata

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--- Comment #12 from Yingjie Liu <[hidden email]> ---
Created attachment 104580
  --> https://bugs.kde.org/attachment.cgi?id=104580&action=edit
has no metadata

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--- Comment #13 from Yingjie Liu <[hidden email]> ---
Created attachment 104581
  --> https://bugs.kde.org/attachment.cgi?id=104581&action=edit
windows5.5.0 version

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--- Comment #14 from Maik Qualmann <[hidden email]> ---
Git commit 76060c16c14dabfb4aa7a5ac956c5292aff810bf by Maik Qualmann.
Committed on 15/03/2017 at 19:55.
Pushed by mqualmann into branch 'master'.

fix MetadataSynchronizer and non working lazy sync in digiKam-5.5.0

M  +1    -1    utilities/maintenance/maintenancedata.cpp

https://commits.kde.org/digikam/76060c16c14dabfb4aa7a5ac956c5292aff810bf

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--- Comment #15 from [hidden email] ---
Lui,

Under Linux, with last Maik patch applied to git master, this fix your problem
to write metadata in image after to apply face tag ?

Gilles Caulier

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--- Comment #16 from Yingjie Liu <[hidden email]> ---
Hi Gilles,
I tested Maik's patch under Ubuntu 16.04(x64). It solves the problem of writing
metadata in image after applying face tag. The metadata shows in the right
sidebar after I clicked "Album->Write Metadata to Images".
These days, I am looking at the "Unavailable" problem: The parameters in
"Metadata Working Group Regions" such as "Area", "Name", "Region List" shows
"Unavailable" even after drawing a tag box. I think, metadata part in digikam
is a bigger part than the last two bugs(372342 and 351866). So far, I have read
the code of how to show the metadata in XMP view, includes the class
MetadataWidget, MetadataListView which showing the metadata, class SetUp,
SetupMetadata, and MetadataPanel which is created after user click the button
to setup tags filters, and these classes decide which item of metadata to show
in the MetadataWidget. Next step, I think I have to look at the code which set
the concrete parameters of "Area", "Name" and "Region List", and how they
worked. I think this will find the reason why they shows "Unavailable".

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--- Comment #17 from [hidden email] ---
Exiv2 library is used in background to handle XMP tags. Exiv2 has a CLI tool to
show metadata from the console. "exiv2 -px file.jpg" show any XMP tags ?

Gilles Caulier

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