[digiKam-users] dk 6beta2 portrait orientation problems

[Maik Qualmann]

That B&W RAW thumbnails are rendered in color is already undone in git/master. 
It was the desire of photographers who shoot in JPEG + RAW to see the RAW 
image then the original and not the embedded B & W preview image. However, we 
have 2 issues currently, not all B&W thumbnails are actually always B&W and 
contain colored pixels from the compression. And to recognize the actual 
orientation to the original RAW image. When Gilles creates updated packages (> 
15.10.2018), the problem is fixed for you.

Maik

Am Donnerstag, 18. Oktober 2018, 19:17:20 CEST schrieb 
digikam at 911networks.com:
> On Wed, 17 Oct 2018 08:03:40 +0200
> 
> Maik Qualmann <metzpinguin at gmail.com> wrote:
> > And your RAW images that you have already loaded with
> > digiKam-5.9.0, are also some of images rotated?
> > 
> > Maik
> 
> I'm not sure that I understand what you are asking.
> 
> Both 5.9 and 6b2 are loading the same photos located on: /drive-b/photos
> (/dev/sdb1). I have a 5.9 database and a 6b2 database and I rename them
> as needed for v5.9 or v6b2.
> 
> digikam4.db.59
> recognition.db.59
> similarity.db.59
> thumbnails-digikam.db.59
> digikam4.db.6b2
> recognition.db.6b2
> similarity.db.6b2
> thumbnails-digikam.db.6b2
> 
> 
> * The images that are rotated in 6b2 are not rotated in 5.9
> * Most of the images have a B&W preview. The B&W preview is gone in
>   6b2
> 
> Somehow in the thumbnail view, 6b2 is reading the the image preview
> and processing it while still in the thumbnail mode. I never went in
> the edit. I do not DK for any of the editing. I could see 6b2
> converting the thumbnails from B&W rotated portrait to colour
> landscape.
> 
> > Am Mittwoch, 17. Oktober 2018, 02:12:47 CEST schrieb
> > 
> > digikam at 911networks.com:
> > > On Tue, 16 Oct 2018 23:24:29 +0200
> > > 
> > > Maik Qualmann <metzpinguin at gmail.com> wrote:
> > > > Does the problem only occur with RAW files taken in B&W?
> > > 
> > > No, it also happens with RAW files in colour. It happens with
> > > Pentax (PEF), Pentax (DNG), Canon (CR2) and Fuji (RAF).
> > > 
> > > I usually (not always) shoot RAW with B&W/Monochrome preview
> > > (about 50%-to-60% of the time). The other 40% to 50%, the preview
> > > is colour.
> > > 
> > > I never do JPEGs directly.
> > > 
> > > Thanks
> > > 
> > > Syv
> > > 
> > > > Maik
> > > > 
> > > > Am Dienstag, 16. Oktober 2018, 22:29:52 CEST schrieb
> > > > 
> > > > digikam at 911networks.com:
> > > > > Further info:
> > > > > 
> > > > > The rotating is done by DK6beta2
> > > > > 
> > > > > 1. I copied a all bunch of files into one of the directory
> > > > > "watched" by DK6b2, including about 30 images in portrait
> > > > > orientation 2. DK6b2 first displayed the thumbnail in the
> > > > > portrait orientation 3. after a few seconds DK6b2 processed
> > > > > these images and rotated them 1 by 1 to landscape.
> > > > > 
> > > > > I'm not using DK for any image processing, I'm using
> > > > > Rawtherapee. Is there a way of disabling image processing in
> > > > > DK?
> > > > > 
> > > > > Thanks
> > > > > 
> > > > > Syv
> > > > > On Tue, 16 Oct 2018 07:41:14 +0200
> > > > > 
> > > > > Gilles Caulier <caulier.gilles at gmail.com> wrote:
> > > > > > Hi,
> > > > > > 
> > > > > > Welcome to the RAW shot world. You problem is well know, as
> > > > > > you have post processed the CR2 files in your camera to
> > > > > > rotate the preview in right orientation while previewing
> > > > > > photo.
> > > > > > 
> > > > > > When you touch orientation of preview with camera, this do
> > > > > > not change the RAW data but the JPEG preview image embedded
> > > > > > inside the file.
> > > > > > 
> > > > > > The problem is : the JPEG image has no Exif info attached
> > > > > > (where we found the orientation information in standard).
> > > > > > The only information oabout orientation come from standard
> > > > > > Exif from RAW metadata. Both image are different as you
> > > > > > post-process orientation with camera. So now, digiKam is
> > > > > > lost.
> > > > > > 
> > > > > > Perhaps this information from Canon JPEG preview can be
> > > > > > taken from private RAW makernotes, i don't know.
> > > > > > Another solution will be to render the thumbnail with RAW
> > > > > > data (using a simplified demosaicing to prevent time
> > > > > > latency).
> > > > > > 
> > > > > > I would to know how software render the CR2 preview here ?
> > > > > > Aperture, LR, etc...
> > > > > > 
> > > > > > Best
> > > > > > 
> > > > > > Gilles Caulier
> > > > > > 
> > > > > > Le mar. 16 oct. 2018 à 02:09, <digikam at 911networks.com> a
> > > > > > 
> > > > > > écrit :
> > > > > > > Correction:
> > > > > > > 
> > > > > > > It's not all the portrait orientation images that are
> > > > > > > rotated, but the vast majority are, see:
> > > > > > > 
> > > > > > > https://i.imgur.com/W5bNhcM.png
> > > > > > > 
> > > > > > > Thanks
> > > > > > > 
> > > > > > > Syv
> > > > > > > 
> > > > > > > .......................
> > > > > > > 
> > > > > > > Converted yesterday from dk5.9 appimage to dk6beta2
> > > > > > > appimage.
> > > > > > > 
> > > > > > > I just noticed a problem: all my portrait orientation
> > > > > > > images are sideways:
> > > > > > > 
> > > > > > > https://i.imgur.com/rx6EMNX.png
> > > > > > > 
> > > > > > > How to deal with that?
> > > > > > > 
> > > > > > > --
> > > > > > > sknahT
> > > > > > > 
> > > > > > > vyS