[Digikam-users] half size raw preview: not available for Canon CRW or CR2?

Anders Stedtlund falolaf at gmail.com
Sun Oct 2 10:51:41 UTC 2011


Hi Rinus,

I have tested, many times, your approach but I can't reproduce your
behaviour (hope that I understood you correctly). It always says
"Embeded JPEG Preview", and the same size of the preview is shown.

Can you reproduce both in light table and in album view?

I have measured with kruler and I have these figures. All measures are
the width of the image.

My screen is 1366x768. The test image is in landscape, 3272x2178. (Canon SRAW1)

In album view the preview  measures around 1040 pixels. Which digiKam
says is 32% in zoom. This should give about 3250 pixels in 100%.
(Quite close)

In light table the preview measures around 638 pixels, which digiKam
says is 19% in zoom. This should give about 3358 pixels in 100%. (A
bit over)

I assume that the embedded preview isn't the same size, in pixels, as
the main image? Hence, I always see the main image as preview?

Another thing I have seen during these tests is that if I have enabled
the load full-sized images for the album view and the digiKam window
is maximised, I can't have the preview smaller than slightly bigger
than "fit to window". This means that there is a scroll bar to the
right that I can scroll a pixel or so. And if I manually types e.g.
20% zoom it immediately returns to 32%. But that might be another
problem...

/Anders

2011/10/2 sleepless <sleeplessregulus at hetnet.nl>:
>
> Op 02-10-11 08:13, Anders Stedtlund schreef:
>>
>> Hi,
>>
>> I would say that for me the settings doesn't make any difference
>> actually. Not in album view, not in light table. That's odd.
>>
>> In album view the image is at 32% when fit to window. In light table
>> it's at 19% when fit to window.What size should I expect from the embedded
>> preview?
>
> Hi Anders,
>
> This is completely dependent of the resolution of your screen and the way
> you set up your screen layout.
> The way I checked was by estimating (measuring is better) the view window
> against the whole screen. In my case it is about half screen height which
> equals aproximately 600 pixels.
> Setting photosize to 100 % I need 6 times click the slider downward, so my
> picture height size equals 3600 pixels, wich is for me the assurance I am
> looking at the raw picture and not at embedded preview.
> If I look at embedded preview, I need only one click to cover the whole
> image.
>
> But the nasty thing is I could not reproduce what I did yesterday, today it
> was only possible to view the real thing and not the embedded preview even
> though it kept saying ¨embedded jpeg prview¨
>
>
> But repeatedly doing for several times:
> Settings->Configure Digikam->lighttable->¨load full sized image DEchecked¨
> and
> Settings->Configure Digikam->album view->¨embedded preview loads fullsized
> images¨ DEchecked
>
> Settings->Configure Digikam->lighttable->¨load full sized image checked¨ and
> Settings->Configure Digikam->album view->¨embedded preview loads fullsized
> images¨ checked
>
> brought it back.
>
> I can view either Raw or embedded, but it keeps saying ¨embedded jpeg
> prview¨ in either case.
>
> I would appreciate if you try to do it with repeatedly changing settings to
> see if you can change the results as I managed. We have clearly a problem
> here, but it is still so randomly that I can not make a useful bug report.
> We should at least know what we are looking at without counting pixels.
> Some other guy made already a report and did a withdrawel of it, because his
> problem was cured. Maybe some others will do some investigations in to this
> matter as well.
> Best,
> Rinus
>
>
>>
>> /Anders
>>
>> 2011/9/30 sleepless<sleeplessregulus at hetnet.nl>:
>>>
>>> Some investigation brougth this forward. In my case it says for PEF files
>>> embedded jpg, but I am actually looking at the RAW file.
>>> Want to try: Put the lighttable window to 100% and see the difference at
>>> the
>>> size of the slider at either settings.
>>> So it looks the message not being updated according the changed settings.
>>> Rinus
>>>
>>> Op 30-09-11 14:31, sleepless schreef:
>>>>
>>>> Have you tried to set Settings->Configure Digikam->lighttable->load full
>>>> sized image enabled?
>>>> Makes the difference on dng anyway.
>>>> Rinus
>>>> Op 30-09-11 13:24, Gilles Caulier schreef:
>>>>>
>>>>> core application, through libkdcraw which embed libraw.
>>>>>
>>>>> Gilles Caulier
>>>>>
>>>>> 2011/9/30 Anders Stedtlund<falolaf at gmail.com>:
>>>>>>
>>>>>> Is it the core application or kipi-plugins that handles this?
>>>>>>
>>>>>> /Anders
>>>>>>
>>>>>> 2011/9/30 Gilles Caulier<caulier.gilles at gmail.com>:
>>>>>>>
>>>>>>> No, 'sit the same one...
>>>>>>>
>>>>>>> Gilles Caulier
>>>>>>>
>>>>>>> 2011/9/30 Anders Stedtlund<falolaf at gmail.com>:
>>>>>>>>
>>>>>>>> I seem to have libraw 0.13.5. Should I use something newer?
>>>>>>>>
>>>>>>>> /Anders
>>>>>>>>
>>>>>>>> 2011/9/30 Gilles Caulier<caulier.gilles at gmail.com>:
>>>>>>>>>
>>>>>>>>> I think it depand of libraw to compute Raw half size preview.
>>>>>>>>>
>>>>>>>>> I use all code from git master.
>>>>>>>>>
>>>>>>>>> Gilles Caulier
>>>>>>>>>
>>>>>>>>> 2011/9/30 Anders Stedtlund<falolaf at gmail.com>:
>>>>>>>>>>
>>>>>>>>>> Can I have done something wrong with my build? What would trigger
>>>>>>>>>> this
>>>>>>>>>> behaviour?
>>>>>>>>>>
>>>>>>>>>> Can't remember if it started with 2.0 or 2.1.
>>>>>>>>>>
>>>>>>>>>> /Anders
>>>>>>>>>>
>>>>>>>>>> Den 30 sep 2011 12:04 skrev "Gilles
>>>>>>>>>> Caulier"<caulier.gilles at gmail.com>:
>>>>>>>>>>>
>>>>>>>>>>> It'not reproducible here. i can load CR2 half size Raw preview,
>>>>>>>>>>> instead Embeded JPEG
>>>>>>>>>>>
>>>>>>>>>>> Gilles Caulier
>>>>>>>>>>>
>>>>>>>>>>> 2011/9/30 Anders Stedtlund<falolaf at gmail.com>:
>>>>>>>>>>>>
>>>>>>>>>>>> I have tested with a new profile but it gives me the same
>>>>>>>>>>>> result,
>>>>>>>>>>>> only
>>>>>>>>>>>> preview of embedded jpg.
>>>>>>>>>>>>
>>>>>>>>>>>> /Anders
>>>>>>>>>>>>
>>>>>>>>>>>> 2011/9/29 Anders Stedtlund<falolaf at gmail.com>:
>>>>>>>>>>>>>
>>>>>>>>>>>>> "Emebeded preview loads full-sized images" enabled or not gives
>>>>>>>>>>>>> the same
>>>>>>>>>>>>> result.
>>>>>>>>>>>>>
>>>>>>>>>>>>> /Anders
>>>>>>>>>>>>>
>>>>>>>>>>>>> 2011/9/29 Gilles Caulier<caulier.gilles at gmail.com>:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Look in config dialog, in Album-View section, Preview Options.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> Gilles Caulier
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> 2011/9/29 Anders Stedtlund<falolaf at gmail.com>:
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> (And now I will finish the mail before I send it......)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> jpg images says: Full Size Preview
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> My setup:
>>>>>>>>>>>>>>> digiKam 2.1.1 (built by me)
>>>>>>>>>>>>>>> kipi-plugins 2.1.1 (built by me)
>>>>>>>>>>>>>>> openSuse 11.4
>>>>>>>>>>>>>>> KDE 4.7.1
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> /Anders
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> 2011/9/29 Anders Stedtlund<falolaf at gmail.com>:
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Hi,
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> I'm now running digiKam 2.1.1 and kipi-plugins 2.1.1.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Some time ago in an older version of digiKam, I was able to
>>>>>>>>>>>>>>>> use "half
>>>>>>>>>>>>>>>> size raw preview". Now this seems not to be possible.
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> Was this a change of puspose?
>>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>>> jpg images says:
>>>>>>>>>>>>>>>>
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