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2007.07.04 17:28 "Re: 16-Bit-Per-Channel Lossless Compression", by Michael Wolf
On Wed, 04 Jul 2007 19:13:40 +0200, Stephen Carlsen <sc42business@mac.com> wrote: > If we can come up with a simple approach that gives us on the order > of 2:1 compression of 16 bit photographs, is this useful, or are > storage space and bandwidth now so inexpensive that we don't care any > more? You might want to have a look at openEXR and the compression schemes it uses (most of them lossless). They have been designed for 16/32bit float and real world imagery (i.e. film, which is close enough to photographs). None of them achieve 1:2 though. You're lucky if you manage to shave off 30%-40%. Cheers, Mike -- db&w Bornemann & Wolf GbR Dagmar Bornemann, Michael Wolf Seyffer Str. 34 70197 Stuttgart Germany http://www.db-w.com http://www.infinimap.com tel: +49 (711) 664 525-0 fax: +49 (711) 664 525-1 icq: 252887990 skype: lupus_lux