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

Sun Oct 2 12:42:16 BST 2011

Just a question about this problem.

When you turn on debug space with kdebugdialog (kdcraw, kexiv2,
digiKam), do you sees omething special in the console when you show
raw preview ?

Gilles Caulier

2011/10/2 sleepless <sleeplessregulus at hetnet.nl>:
> Op 02-10-11 12:51, Anders Stedtlund schreef:
> Hi Anders,
> Thanks for your precise investigations.
> I prefer to figure out the problems as much as possible, so the programmers
> don´t loose valuable time on it. But I ran out of ideas.
> I forwarded this tread to the programmers in the hope for some luminous idea
> about what´s going on.
>
>> 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?
>
> yes I can, but for the moment it keeps saying
> "Embeded JPEG Preview¨
>>
>> 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?
>
> I guess, that´s the case here indeed. Do you know if your images actually
> have an embedded jpeg?
>>
>> 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...
>
> yes, and I found that the image sometimes is being displayed as 640% but
> reported as 100%.
>
> It looks like a real mess, but I hope it is not what it looks like.
> Best,
> Rinus
>>
>> /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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>>>>>>>>>>>>>>>>>
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