[Digikam-users] Main window 100% not pixel per pixel

[Samuel Gilbert]

Hi Micha,

  This solved my problem.  Thank you very much!  Merci beaucoup!

Samuel

On 2010-07-16 Friday 18:16:55 Micha Neubauer wrote:
> Hey Samuel,
> 
> is it maybe that you have only "Reduced Size Preview"?
> You can change that in
> Settings --> Configure Digikam --> Album View
> and here under
> Misc Options you can set
> "Embedded Preview loads full-sized images"
> 
> I hope that the answer is that easy...I was wondering as well one day why
> Gwenview had a better resolution ;-)
> 
> micha
> 
> On Friday 16 July 2010, 21:05:51 Samuel Gilbert wrote:
> > Hello,
> > 
> > Here is the requested info and some tests I did to try to figure out what
> > is going on :
> > 
> > Version 1.3.0
> > Using KDE Development Platform 4.4.5 (KDE 4.4.5)
> > ArchLinux package : digikam 1.3.0-1
> > 
> > I don't know if it's relevant, but Kipi-plugins are also version 1.3.0.
> > 
> > The problem occurs regardless of the image type.  It occurs with all the
> > photos I tried :
> > 
> > Canon Rebel XT JPEG
> > Canon Rebel XT RAW (CR2 files)
> > JP2 files generated with digiKam's RAW import tool
> > Nikon D90 JPEG
> > Nikon D90 RAW (NEF files)
> > 
> > I have some PNG files that are scans of photos taken with my old 35mm
> > Camera. The problem does not occur with those files.  It also does not
> > occur with the JPEG files generated by my WebCam.
> > 
> > I noticed that the files for with the zoom works correctly do not have
> > any kind of metadata tags (EXIF, IPCT, etc...).  Could it be that
> > digiKam uses something in the tags to figure out what is a 100% zoom? 
> > If that is the case, what does 100% mean?
> > 
> > I did the following test to check if digikam is using the image DPI info
> > :
> > 
> > I selected 50% zoom in the main windows with a JPEG file generated by my
> > Canan Rebl XT.  The image has 3456 pixels by 2304 for which the X and Y
> > resolution is 72 with the resolution unit set to "Inch".  On screen, the
> > display size is 167mm by 112mm.  Once converted to inches, we get
> > 6.57480315 by
> > 4.40944882.  This mean that we have 3456 for 6.57480315 inches at 50%
> > zoom.
> > 
> > 3456 px / 6.57480315 inch / 2 (to account for 50% zoom) = 262.82155687
> > 
> > This does not match the image's DPI.  I also verified that Xorg had the
> > correct monitor size prior to the test checking the screen dimensions
> > reported by xdpyinfo against the physical display size measured with a
> > ruler.
> > 
> > In the EXIF tags of the image used for the test, there is also the focal
> > plane resolution.  Resolution is 3954.23 by 3958.76 with unit set to
> > "inch".  Given the image size, this gives a sensor size of 0.874000753623
> > by 0.582000424375 inches.  That may be, but I don't understand how it's
> > related to the size of the image on screen when a zoom of 100% is
> > selected.
> > 
> > Is there something else I should check?
> > 
> > Samuel
> > 
> > On 2010-07-16 Friday 02:02:09 Gilles Caulier wrote:
> > > Which digiKam version ?
> > > 
> > > Which image type ?
> > > 
> > > Try digiKam 1.3.0
> > > 
> > > Gilles Caulier
> > > 
> > > Le 16 juillet 2010 07:16, Samuel Gilbert
> > > 
> > > <samuel.gilbert at usherbrooke.ca> a écrit :
> > > > Hello,
> > > > 
> > > >  I was wondering if there is a reason why the image isn't displayed
> > > >  pixel
> > > > 
> > > > per pixel when I select 100% in the main window.  If I open the image
> > > > in the editor or in another viewer, selecting a zoom of 100% results
> > > > in the image being displayed pixel per pixel.  Is this behavior a
> > > > bug, or is there something I'm missing?
> > > > 
> > > > Samuel
> > > > _______________________________________________
> > > > Digikam-users mailing list
> > > > Digikam-users at kde.org
> > > > https://mail.kde.org/mailman/listinfo/digikam-users
> > > 
> > > _______________________________________________
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> > > Digikam-users at kde.org
> > > https://mail.kde.org/mailman/listinfo/digikam-users
> > 
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> 
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