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September 2005
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2005.09.27 02:26 "Re: Additional Lossless Compression Schemes", by Bob Friesenhahn
On Tue, 27 Sep 2005, Joris wrote: > > I think that 2 megabyte is wasteful. Also, while 2 megabyte may seem > > like just a little bit of memory in a modern computer, it may be a lot > > of memory for a device like a photo printer. > > You are confusing the need of LibTiff (allocate, store and decompress > complete strip into an allocated and stored decompressed... euh, > complete strip, in a single go) with the need of the format (seperate > tiles/strips are perfectly streamable if their compression scheme is, > and all compression schemes are, sofar). Agreed. However for zip compression, Adobe's guidance of 32K is reasonable guidance. You can verify for yourself that the compression benefits of larger strips are negligible past a strip size of 32K. Bob ====================================== Bob Friesenhahn bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/