[Digikam-users] tool to view 4 images at once on screen (personal not related to dk)

[sleepless]

Op 16-09-11 15:29, Jean-François Rabasse schreef:
>
> On Fri, 16 Sep 2011, Gilles Caulier wrote:
>
>> And how to synchronize views to zoom and pan canvas at the same time ?
>>
>> How to image by pair to compare side by side ?
>>
>> Loading all images at the same time will not explode your memory ?
>>
>> What's about to show a preview of RAW image in gimp, without process
>> demosaicing ?
>
> Well, I didn't pretend GIMP was THE definitive solution to all 
> problems:-)
> My comment was rather to point out an alternative to Gwenview.
> And, as usual, the best tool for someone will deeply depend on what you
> expect to do with. But I can answer to your objections :
>
>
>> And how to synchronize views to zoom and pan canvas at the same time ?
>
> Synchronisation, you're right, this requires a single partitionned
> window to handle that. With a "any windows number" tool, you don't get
> synchronisation. But you're not stuck to 2, 4 or 6 images at a time.
Gwenview: contol/shift click in thumbnail bar and to select any number 
of pictures (up to 6 I beleave) to compare, rightclick synchronize, 
control left click to zoom in contol rightclick to zoom out, move 
sliders to sychronuously move around.

More than 6 looks quite pointless, select the best and add 5 new ones 
and select the best again.
This could be copied not improved.
Digikam and Gwenview makes a perfect match for me.
Rinus
>
>
>> Loading all images at the same time will not explode your memory ?
>
> Memory is not a software related issue but a computer issue.
> Whatever tool you use, the max number of images you may be able to handle
> at a time will depend on your computer RAM and swap.
> If you can't open 10 images with GIMP, you won't open them with Gwenview,
> or anything else, at least on the same machine.
> (And swap memory is not a solution, it's too sloooooooow)
>
>> What's about to show a preview of RAW image in gimp, without process
>> demosaicing ?
>
> RAW image ? Was that the initial issue ? I don't know raw images viewers,
> or multiple raw images viewers, just raw images processors.
> When I try to open with GIMP one of my .NEF file, GIMP fells back to
> lauching ufraw (it's my KDE file association).
> If I try to open it with Gwenview, I just get an error message
> "cannot display documents of type image/x-nikon-nef"
> So...
>
>
>> How to image by pair to compare side by side ?
>
> As for "compare side by side", it would probably require to define what
> is "compare", what kind of comparision is awaited ? To have a global look
> on similar images, composition, general coloured atmosphère, having
> windows side by side is the same as having images side by side in a
> single window.
> In some other cases, images side by side will give nothing.
> E.g. you wish to compare similar pictures (same subject, shot in the
> same time interval) taken in low ambient light and at low shutter speed,
> say 1/30 s or 1/15 s, and you suspect you may have some focus defects
> due to slow speed and hand held camera. Side by side will give nothing,
> exceptt if out of focus is obvious (and the image can be garbaged at 
> once).
> To do that kind of comparison, and as I'm a GIMP user, I select a small
> area of each picture with fine details, and copy/paste into an empty 
> work window as layers. Layers can be superimposed, switch on/off one 
> by one,
> it's possible to make one layer half transparent and compare with the
> underlying one on really small details.
> It becomes possible to have an accurate idea of the best focused shot,
> but it takes a bit more time than just "have a glance".
>
>
> But as I said above, there's never a definitive solution and each user
> will have his preferred "modus operandi". Different software are never
> stricly equivalent, so probably each user should test and try such and
> such program, then select the best suited for particular needs.
> I believe the question is not to decide which program is the best
> (the answer will always be : hem, it depends...:-) but what can do
> such or such program, can do very well, well, not very well, not at
> all, then let users choose according to their needs.
>
> Jean-François
>
>
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