Roger,
Insightful as usual!! The truth is that I don't know the details of my
question. It is just that it struck me that electronic devices somewhere along
their "response" chain behaved like or somewhat like film at the "toe" and
"shoulder" of a film characteristic curve. And maybe even in the midportions
possibly. Is "reciprocity" or the "reciprocity law" (actually I don't think it
is a "law") followed by digital devices since we've been shown it is not by
"analog" ones like film?
My questioning was probably actually pretty basic in scope and understanding.
But anyone who cares to enlighten me ... by all means!! ;)
andy
Roger Eichhorn wrote:
Interesting question. Linear with respect to what? Intensity of a
single color? Or over what wavelength span? By what measure?
Output vs. input, in what units? Before or after A to D conversion?
Do you place the blame on the A side, the D side or in between? Or am
I missing the point entirely? The CCD sensors favor Green over Red and
Blue. Does this enter the picture (pun intended)?
Roger
On 31 Mar 2008, at 4:24 PM, ADavidhazy wrote:
Robert,
Given that, why would we care a whole lot about the devices we use
being
linear?
Because I don't believe it and I think students should also question
such "absolutes" so I just wanted to be more confident myself that I
was not totally out in left field so to speak!
;)
andy
