On Thu, Sep 6, 2012 at 3:45 AM, David Singer <sin...@apple.com> wrote: > > On Sep 4, 2012, at 12:47 , Ian Hickson <i...@hixie.ch> wrote: > >> On Thu, 7 Jun 2012, Mark Callow wrote: >>> >>> IIRC Kodak's PhotoCD image format had this characteristic. The first >>> part is a low res. image, the second is the differences between the low >>> res. image zoomed to the high res. size and the actual high res. image. >> >> Such formats certainly would make a lot of this simpler! > > supported in JPEG 2000 (for files in resolution progression order), FWIW
What software can be used to create such images for testing? (Last I tried this with JPEG 2000 creation software, decoding a quarter-sized image required the first *half* of the file.) -- Henri Sivonen hsivo...@iki.fi http://hsivonen.iki.fi/