Re: [Libexif-devel] libexif for raw images

[Jan P. <pa...@pi...>]

Hi guys,

TIFF structure is simple. In fact, libEXIF already contains TIFF
parsers. EXIF is built on top of TIFF.
The TIFF consists of an 8-byte TIFF header (already parsed in
exif_data_load_data and Cannon mnote), several IFDs, and image data.
I am volunteering to extend libEXIF to parse EXIF embedded in TIFF.
However, because leaving for holiday, I can do it after July the 10th.

 == Jan

>  Udi Fuchs twisted the bytes to say:
>
>  Udi> I'm also no expert in the TIFF structure, but looking at dcraw.c
> and Udi> specifically at the function parse_tiff() it looks pretty
> simple. I Udi> think that it is the sample as JPEG after you remove the
> first 12 Udi> bytes from the JPEG header.
>
> As trivial/difficult as JPEG. At least the canon version. It embeds a
> EXIF record inside the tiff, two several jpegs and the raw data. You can
> check the code I wrote to scan this files in gqview
> (src/format_canon.c). It is fairly simple and straightforward (100-200
> lines of code). gqview is in C, though. It is nicely documented by Adobe
> (TIFF V 6.0).
>
>
>
>  Udi> Udi
>
>  Udi> On 6/30/05, Lutz M=FCller <lu...@us...> wrote:
>  >> On Wed, 2005-06-29 at 22:46 -0400, Hubert Figuiere wrote:
>  >> > Like reinventing the wheel ?
>  >> =20
>  >> Again, I don't know how complex the TIFF structure is. JPEG is
> trivial. =20
>  >> Regards
>  >> --