[digiKam-users] face detection with 7.2RC 1st try

[Rob Dueckman]

I would scan all the photos again using "scan again and merge results"
option in the maintenance menu.

No need to rebuild your training data.  I find that if the data is crap
to start with, sometimes you're better to clear everything and start
fresh.  Having said that, after a little while of tagging the correct
faces, the training database gets a little more intelligent.

Rob


On Thu, 2021-02-04 at 17:33 +0100, frederic chaume wrote:
> Hi Rob
> 
> Thanks for your recomendation. Just tried it with this option, and
> find another set of  unconfirmed (~100) over 20K unknown
> how to refine again ? should I run recognition again ? restart the
> training again ?
> Frederic
> 
> 
> Le 04/02/2021 à 13:34, Rob Dueckman a écrit :
> 
> In the people tab, under settings, do you have YOLO v3 selected?
>  That might help.  Enable YOLO, and select a bunch of photos you know
> have missed a lot of faces and try recognition again.
> 
> Rob
> 
> 
> On Thu, 2021-02-04 at 08:30 +0100, frederic chaume wrote:
> 
> > Hi Maik
> > 
> > thanks for the clarification, that makes the process more clear.
> > Below tha last result I got
> >  * I have run the training database using the option "clear unconfirmed
> >    face and analyse again" (translation from french, so may differ from
> >    the option name)
> >  * I have completed the face detection on all catalogs, now I have ~20K
> >    unknown faces (using "ignore pictures already analyzed")
> >  * I have run the face recognition again , and got some new unconfirmed
> >    faces with a good success rate, but far from the number of faces I
> >    should have exepected from the unknown
> > what should be the options to get a better result on recognitions ?
> > Thanks and regards
> > 
> > frederic
> > 
> > 
> > Le 04/02/2021 à 08:16, Maik Qualmann a écrit :
> > Face recognition is carried out on all images with "Unknown" faces. So all 
> > faces under the virtual tag "Unknown" in the People view. Album bassierd 
> > wouldn't make sense. You probably don't even know which albums the unknown 
> > faces come from in order to choose the right albums.
> > The training database rebuild is not album based either. All known faces are 
> > used.
> > Maik
> > Am Mittwoch, 3. Februar 2021, 12:16:31 CET schrieb frederic chaume:
> > 
> > 
> > > Hi Maik
> > > Thanks a lot
> > > after running the training dabase, the success rate is close to 100%.
> > > Excellent !
> > > now still some clarification needed.
> > >  * on the face detection menu, album selection can only be modified
> > >  when "face detection" is set, no change possible when "face
> > >  recognition is set". So should we run 1st the "face detection" (and
> > >  then select the albums) before runinng "face recognitation" ?
> > >  * still seeing few faces with 1 new , while no unconfirmed is proposed
> > >  (but not systematic)
> > >  * I have run a database training on all collections , then started a
> > >  face recognitation on all collections (just set "all collections" in
> > >  face detection without running it, hope it is ok). still on-going,
> > >  will let you know the result,
> > > thanks
> > > frederic
> > > Le 01/02/2021 à 22:23, Maik Qualmann a écrit :
> > > 
> > > 
> > > > It is important that you rebuild the training database. This is done in
> > > > the
> > > > maintenance tool under face detection/recognition activate the checkbox
> > > > for
> > > > the rebuild the training database. The settings for the albums to be
> > > > searched are in a tab in the left People sidebar.
> > > > Maik
> > > > Am Montag, 1. Februar 2021, 09:48:56 CET schrieb frederic chaume:
> > > > 
> > > > 
> > > > > Hi all
> > > > > just installed 7.2 RC on windows and start playing with face tagging ,
> > > > > below a 1st quick feedback
> > > > >  * 1st of all: I like the presentation and the speed. it is much more
> > > > >  efficient then previous release (ease to find confirmed,
> > > > >  unconfirmed)
> > > > >  * seems the number of initial tags when I start using 7.2 is much
> > > > >  lower than what I have in previous release . Is that normal?
> > > > >  * some face tag is shown with 1 new , but no new is proposed, only the
> > > > >  confirmed ones are available/visible
> > > > >  * with the 1st run , the success rate is very low (<10%), so I have
> > > > >  unconfirmed most of them (and confirmed the positive ones)
> > > > >  * 2nd run very few new face is proposed for the existing tags (1 or
> > > > >  2 in some faces tags)
> > > > >  o I have thousands of "unkonwn" but was thinking they could be
> > > > >  proposed to the existing faces as "unconfirmed" faces?
> > > > >  o how to select albums? in the people menu on the left, I see "no
> > > > >  album selected" and didn't find how to add it (I'm using
> > > > >  recognize face). I tried using the maintenance tool, but no
> > > > >  change
> > > > >  o do we have to run "detect face" before "recognize face" ? I
> > > > >  tried also and didn't get more new unconfirmed proposed in the
> > > > >  face tags
> > > > > Did I miss something ?
> > > > > thanks and regards
> > > > > frederic
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