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

Sun Oct 2 12:45:30 BST 2011

On my computer, with option enabled on setup dialog :

digikam(10248)/KDCRAW KDcrawIface::KDcraw::loadHalfPreview: Try to use
reduced RAW picture extraction
Scaling with darkness 0, saturation 3947, and
multipliers 1,937500 1,000000 1,777344 1,000000
Converting to sRGB colorspace...
digikam(10248)/KDCRAW KDcrawIface::KDcraw::loadHalfPreview: Using
reduced RAW picture extraction

It's an ARW raw file show in preview mode from album icon view.

Gilles Caulier

2011/10/2 Gilles Caulier <caulier.gilles at gmail.com>:
> 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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>>>>>>>>>>>>>>>>>
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>>>>>>>>>>>>>>>
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>>>>>>>>>>>>>
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>>>>>>>>>>>>>
>>>>>>>>>>>>>
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>>>>>>>>>>
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>