Re: ATM stacking or editing photos?

[Andy Saulietis <iss@pvtnetworks.net>]

Dominic writes,

>Are these doctored images revealing what is
>really there or are they using alogorythms to sharpen images, in
>the process of which, potentially adding details which does not
>in fact exist in reality.
>
>Any ideas, experiences?

Image processing cannot, even theoretically, increase the amount
of information..what happens is that the processing alogorithms
emphasize one aspect on the image at the expense of other aspects.
For expense, a simple unsharp mask can reveal finer details but
you lose the true brightness values and linearity.

See http://www.spaceweather.com/ for Ed Grafton's C-14 picture of Mars
compared with a Hubble image at nearly the same time. HST's image
is sharper of course and is probably more linear in brightness,
but Ed's sharpened image does faithfully reproduce much of the
detail on the surface.

 
Andy Saulietis
ISS Enterprises
PO Box 19
Mayhill
NM 88317

World's first astronomy land development:

http://www.pvtnetworks.net/~iss/starend1.htm
505-682-5016 voice/fax, call voice or e-mail to set up
e-mail: iss@pvtnetworks.net