Digital BW, The Print

> Also, anti-aliasing _must_ be done with a diffuser over the sensor, and
> can't be done after the fact through calculation. Once the image is
> spatially sampled by the sensor layout pattern, it's too late to fix
> aliasing.

Please don't mention that to the millions of photoshop users who do
anti-aliasing every day... ;-)

I don't believe that's correct, and that anti-aliasing is, in fact, a
pretty darned (read: NSA) sophisticated algorithm (I learned to spell
it... :-) There are both optical and digital approaches to anti-aliasing.



> 
> > Take a camera RAW of 6 megs, and blend the three layers to your liking
> > for full tonal range, and you'll have a perfectly sharp 6 meg photo.
> 
> What if the image has detail only in the red or blue channel?
Consider the
> case of some tree branches against blue water, or some telephone wires
> against a red wall. In that case, virtually all the detail is in one
> channel, and adding the other two does nothing.

That's true... but even if you toss out the 2 of the 3 channels
entirely, you -still- have a 6 megapixel image ...

Cordially

Tracy


> 
> Your other points I basically agree with.
> 
> --
> 
> Ciao,               Paul D. DeRocco
> Paul                mailto:pderocco@i...