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

Gilles Caulier caulier.gilles at gmail.com
Sun Oct 2 13:23:34 BST 2011 

2011/10/2 Anders Stedtlund <falolaf at gmail.com>:
> Do I need to build with debug?

No. Just install debug package of digiKam, libkexiv2, and libkdcraw.

Run kdebugdialog, and turn on KExiv2, KDcraw, and digiKam debug space.

Start digiKam from a console. Select a Raw file and show preview. Look
message printed on the console.

Gilles Caulier

>
> This is what I get now:
> digikam(32662)/digikam (core) Digikam::DMetadata::getIccProfile: Exif
> color-space tag is sRGB. Using default sRGB ICC profile.
> digikam(32662)/KEXIV2 KExiv2Iface::KExiv2::getImageOrientation:
> Orientation => Exif.Image.Orientation =>  1
>
>
> /Anders
>
> 2011/10/2 Gilles Caulier <caulier.gilles at gmail.com>:
>> 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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