[Digikam-devel] Re: Status of face detection

[Gilles Caulier]

What's about to release digiKam 2.0.0-beta1 soon, and move
libkface/libkmap to kdegraphics/libs now. Like this all will be ready
to use with next KDE 4.6...

Gilles

2010/10/21 Marcel Wiesweg <marcel.wiesweg at gmx.de>:
> Hi,
>
> in my impression, the face detection, both in backend and UI, has matured
> enough now that it deserves some wider testing.
> (be sure to have libface from yesterday, and also OpenCV 2.1.0)
>
> I have scanned about 3000 real-life holiday images in the last days.
> The scanning is on the "fast and safe" side: You will have false positives,
> but the real faces form the majority. You will easily find faces which are not
> recognized - strong shadows, rotated head, closed eyes are typical.
> But my overall impression is quite good (at least I have this evidence with a
> certain female face I happen to take photos of quite often)
>
> Since some weeks, only one cascade in libface is used for initial scanning,
> which makes is considerably faster. I need less than an hour for 1000 images.
> (That means of course a face will not be found if this cascade does not find
> it)
>
> There are some known issues with the UI:
> - in the icon view, when a face from the "Unconfirmed" folder is confirmed or
> rejected, there is a slight delay before the view is refreshed. Ideally, the
> face should disappear immediately, but that's not easy to do properly
> - the overlays only act on the single, hovered image. I plan to make them act
> on all selected images, with a tooltip-like indicator for this fact
> - in the icon view, it's a line edit, in the preview view, a combo box. We'll
> see which solution is better
> - the popups in the preview view are clipped to within the view. There's a Qt
> bug involved, it's not easy to solve.
> - there are two different popups from the combo box: a tree view for
> selection, and a list view for completion when typing. Though, the problems to
> solve by these popups are different as well
> - the counter on the tree view of the People side bar does not work - it still
> counts tag assignments, 0 for unconfirmed, not faces.
> - when scrolling with the mouse wheel, scrolling gets stuck when over one of
> the confirm/reject tool buttons
>
> Issues with the face scanner and dialog:
> - selecting the albums / tags to scan, child albums are not scanned
> - missing to set a lower thread priority for the worker threads.
>
> Recognition:
> Dont test recognition. It is currently reworked by Alex. We must add an option
> to retrain all confirmed images later.
>
> Marcel
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