AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

2007.08.22 06:13 "[Tiff] How to handle big single-strip images?", by Oliver Geisen
2007.08.22 09:36 "Re: [Tiff] How to handle big single-strip images?", by
2007.08.22 12:19 "Re: [Tiff] How to handle big single-strip images?", by Toby Thain
2007.08.22 13:58 "Re: [Tiff] How to handle big single-strip images?", by
2007.08.22 13:00 "Re: [Tiff] How to handle big single-strip images?", by Gerben Vos
2007.08.22 22:03 "[Tiff] Re: How to handle big single-strip images?", by Leonardo Serni

2007.08.22 06:13 "[Tiff] How to handle big single-strip images?", by Oliver Geisen

Hello,

i wonder what will happen if one opens an tiff image where all the data is in a SINGLE strip (some writers offer this option) and also compressed (G4) and someone tries to use TIFFReadScanline with it? I would expect that libtiff needs to read the whole strip, because it's compressed, into memory. Or is it possible to read compressed data by chunks?

If this image is also very large (e.g. 30,000 by 40,000 pixels) this could be very memory intensive, maybe blow up the whole system.

Oliver Geisen
Systemadministrator
_____________________________
Kreisboten Verlag Mühlfellner KG
82362 Weilheim i. Ob.
Tel. 0881/686-904
Fax 0881/686-74
Sitz Weilheim, AG München, HRA 64016, p.h.G.:
Kreisboten-Verlag Verwaltungsgesellschaft mbH,
Weilheim, AG München, HRB 119773,
Geschäftsführer: Dr. Dirk Ippen, Dr. Gerd Waldenmaier