tiff image: what does this mean?

[Pierre Hanser]

hello

i've some (large) tiff images digikam won't handle, the message is

digikam(18687)/digikam (core) Digikam::TIFFLoader::load: TIFF loader:
Cannot handle non-stripped images. Loading file
"/home/screen/péniche/péniche1.tiff"

digikam(18687)/digikam (core)
Digikam::ThumbnailCreator::createThumbnail: Cannot create thumbnail for
 "/home/screen/péniche/péniche1.tiff"

can somebody explain me what a stripped tiff image is, please?


imagemagick says:

$ identify  /home/screen/péniche/péniche1.tiff

/home/screen/péniche/péniche1.tiff TIFF 3584x2618 3584x2618+0+0 16-bit
DirectClass 72.45MB 0.000u 0:00.009

$ display /home/screen/péniche/péniche1.tiff   -> OK

qiv does not display it ok at full size, but gets ok with some size
reduction.

--
        Pierre
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[Pierre Hanser]

responding to myself, after a few googling

a stripped tiff imaged is a tiff image divided in stripes...

(not exactly the same meaning than in 'a stripped executable': a file
without debug symbols)

now the real question: why doesn't digikam support non-stripped images?

--
        Pierre


Le 03/01/2012 17:49, Pierre Hanser a écrit :

> hello
>
> i've some (large) tiff images digikam won't handle, the message is
>
> digikam(18687)/digikam (core) Digikam::TIFFLoader::load: TIFF loader:
> Cannot handle non-stripped images. Loading file
> "/home/screen/péniche/péniche1.tiff"
>
> digikam(18687)/digikam (core)
> Digikam::ThumbnailCreator::createThumbnail: Cannot create thumbnail for
>  "/home/screen/péniche/péniche1.tiff"
>
> can somebody explain me what a stripped tiff image is, please?
>
>
> imagemagick says:
>
> $ identify  /home/screen/péniche/péniche1.tiff
>
> /home/screen/péniche/péniche1.tiff TIFF 3584x2618 3584x2618+0+0 16-bit
> DirectClass 72.45MB 0.000u 0:00.009
>
> $ display /home/screen/péniche/péniche1.tiff   -> OK
>
> qiv does not display it ok at full size, but gets ok with some size
> reduction.
>

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[Marcel Wiesweg]

> a stripped tiff imaged is a tiff image divided in stripes...
>
> (not exactly the same meaning than in 'a stripped executable': a file
> without debug symbols)
>
> now the real question: why doesn't digikam support non-stripped images?

because writing this support is not trivial, noone of us is intimate with the
TIFF format - remember we cannot use the topmost convenience layer of libtiff
as we load 16 bit.
The TIFF format offers a lot of ways to create valid TIFFs differing
substantially from the "usual TIFF" which we support and which covers >90% of
cases.
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