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2009.10.28 17:47 "Re: Number of images in a multi-tiff file?", by Mark Pereira
Thanks Frank for these clarifications ! Mark Frank Warmerdam wrote: > Brad Hards wrote: > >> On Wednesday 28 October 2009 20:01:21 Mark Pereira wrote: >> >>> Is there a way to know the number of images present in a multi-tiff file >>> in constant time. >>> >> TIFFNumberOfDirectories() ? >> > > Mark, > > No, there is not since the directory list needs to be walked to count them. > The count is not available in a header or anything like that. > > Skimming the code briefly it appears that TIFFNumberOfDirectories() is careful > to read the minimum amount of information from the file (a few numbers from > the start of each directory) to count through the file so the cost should > be minimal, but not constant time. > > Best regards, > Business Disclaimer ____________________________________________________________ This e-mail message and any files transmitted with it are intended solely for the use of the individual or entity to which they are addressed. It may contain confidential, proprietary or legally privileged information. If you are not the intended recipient please be advised that you have received this message in error and any use is strictly prohibited. Please immediately delete it and all copies of it from your system, destroy any hard copies of it and notify the sender by return mail. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. ___________________________________________________________