In message ,
"David J Taylor" wrote:

Matt Austern wrote:
[]
One of the crucial things I missed, apparently, was that we really
aren't talking about a 15-bit representation. I missed the fact that
the range really is, [0, 32768] not [0, 32768).

As soon as you start doing any filtering operations you will can
overshoot - ie. you need a range -32768..0..32767, what I would call
signed 16-bit. Of course, no physical medium can depict the negative
brightness levels the negative values imply.

Anf what are they, anyway? Thirsty light sponges?
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John P Sheehy