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

Sun Oct 2 12:39:57 BST 2011

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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