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Re: [PanoToolsNG] New Pentax K10

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  • Roger D. Williams
    On Tue, 05 Dec 2006 01:32:03 +0900, Roger Howard ... Thanks, Roger, that s very clear and makes perfect sense. I think I ve got it straight, now. Fuji s unique
    Message 1 of 8 , Dec 4, 2006
      On Tue, 05 Dec 2006 01:32:03 +0900, Roger Howard
      <rogerhoward@...> wrote:

      > On Sun, December 3, 2006 9:14 pm, Roger D. Williams wrote:

      >> And is that 12-bit
      >> for RAW really right? Or a mistype? Excuse my ignorance. I assumed that
      >> because you could create 16-bit TIFF files developed straight from RAW
      >> images, the latter must themselves be 16-bit. I see that this isn't
      >> necessarily so...
      > I haven't heard of any sensors short of a few on the MF/LF digital backs
      > that can capture true 16bits per pixel of luminosity. But using a 22bit
      > pipeline just means less accumulated quantization error within the
      > internal processing.
      > Think of it this way - if you were stuck to only using integer math, many
      > calculations would be rounded and would accumulate error quickly. By
      > allowing a few extra decimal places, you can work in a higher precision,
      > and then only round back down at the end, minimizing quantization
      > (rounding) error.
      > We process our RAW files into 16bit simply because most imaging software
      > doesn't allow working in 10, 11, or 12 bit modes (for instance) - so your
      > 12bit data is padded out to 16bits.

      Thanks, Roger, that's very clear and makes perfect sense. I think I've got
      it straight, now. Fuji's unique sensor appears to fall between the standard
      12-bit and the MF/LF backs.

      Roger W.

      Work: www.adex-japan.com
      Play: www.usefilm.com/member/roger
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