I agree: it is a bogus issue, but as such it will continue to muddy the
waters around photography.
It was interesting to hear a development in technology,
whereby the grain and noise are removed from negative photographic
materials to reveal even finer detail that the (camera or film) was
apparently able to record. This had been used to restore the film of
Star Wars by Lowry Enterprises using 600 dual processor G5s!
See http://news.bbc.co.uk/1/hi/programmes/click_online/3945149.stm
Quote:
the grain obscures minute details. But the grain is
random, different in every frame.
So by using information from several frames at
once, you can eliminate it, and fill in the missing detail.
It is like pulling back a veil. Now every frame in
the movie becomes pin sharp.
The demo - if not a fake! - was amazing.
Howard
Jeff Spirer wrote:
At 12:08 PM 10/24/2004, Bob Talbot wrote:
As to the forensic evidence: seriously, by
traditional means the
evidence was always there: it was impossible to hide. With digital
that is truly no longer the case. In a composite image, saved as a
jpeg, what finite evidence there might have been is confounded by the
compression. It is truly impossible to tell (unless someone overdoes
the cloning)
It's worth pointing out that, at least in the US, a photograph isn't
proof of anything in a forensic case. It is the testimony of an
individual that validates the photograph as forensic evidence. There
is certainly enough incidents of faked photography in criminal cases
that the technology used to produce the photograph is irrelevant. It's
easier to move a weapon into someone's hand at the crime scene than it
is to successfully clone it into someone's hand, much easier.
It's really a bogus issue, which is why the primary focus in forensic
circle regarding digital technology is is on resolvable detail, not use
of post-processing. I have a real interest in evidence/forensic
photography, and have been reading about it for years. Digital changes
nothing.
Jeff Spirer
Photos: http://www.spirer.com
One People: http://www.onepeople.com/
Surfaces and Marks: http://www.withoutgrass.com
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