LibTiff Mailing List

The answer depends a little on what kind of TIFFs you'll be reading.  If
black and white, you'll find a nice example here:

http://www.ibm.com/developerworks/linux/library/l-libtiff

General tips:
- write several versions of your routines, using different strategies/ideas
- profile your code, and see where your bottlenecks are; if your code is
slow, you can improve it -- if they are in libtiff itself, you're done
- always try to pre-compute the final memory requirements so you can
allocate all at once (superfluous memory management can waste time)
- if you know certain things about types of images, and those types of
images will always be used, you can optimize for them, although that would
generally require tuning of the actual library, not the code that uses it
(for instance, if it's a given that the images are always equal to or small
than a certain size, you can allocate one buffer for that (maximum) size,
and keep re-using that buffer, instead of allocating and de-allocating for
each image in a batch -- realize, though, that the gains are likely to be
marginal)
- if you really need that extra little bit of speed, you might be able to
recompile libtiff with tweaked build settings for your target platform
(consider things like byte-alignment, etc)


AWARE [SYSTEMS]		Imaging expertise for the Delphi developer
		TIFF and LibTiff Mailing List Archive
	LibTiff Mailing List TIFF and LibTiff Mailing List Archive February 2006 Previous Thread Next Thread Previous by Thread Next by Thread Previous by Date Next by Date Contact The TIFF Mailing List Homepage This list is run by Frank Warmerdam Archive maintained by AWare Systems	Thread 2006.02.02 14:33 "Fastest method to load tiff files?", by Edward Lam 2006.02.02 15:00 "Re: Fastest method to load tiff files?", by Bernie Pallek 2006.02.02 15:29 "Re: Fastest method to load tiff files?", by Edward Lam 2006.02.02 15:36 "Re: Fastest method to load tiff files?", by Frank Warmerdam 2006.02.02 15:00 "Re: Fastest method to load tiff files?", by Bernie Pallek The answer depends a little on what kind of TIFFs you'll be reading. If black and white, you'll find a nice example here: http://www.ibm.com/developerworks/linux/library/l-libtiff General tips: - write several versions of your routines, using different strategies/ideas - profile your code, and see where your bottlenecks are; if your code is slow, you can improve it -- if they are in libtiff itself, you're done - always try to pre-compute the final memory requirements so you can allocate all at once (superfluous memory management can waste time) - if you know certain things about types of images, and those types of images will always be used, you can optimize for them, although that would generally require tuning of the actual library, not the code that uses it (for instance, if it's a given that the images are always equal to or small than a certain size, you can allocate one buffer for that (maximum) size, and keep re-using that buffer, instead of allocating and de-allocating for each image in a batch -- realize, though, that the gains are likely to be marginal) - if you really need that extra little bit of speed, you might be able to recompile libtiff with tweaked build settings for your target platform (consider things like byte-alignment, etc) Editor's note: This mail was not originally archived, and has been reconstructed from quotes.

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2006.02.02 15:00 "Re: Fastest method to load tiff files?", by Bernie Pallek