For David Millier

Started 4 months ago | Discussions thread
Lin Evans
Forum ProPosts: 14,561
Like?
Re: Really? "diluted" ... hmmm...
In reply to DMillier, 4 months ago

Why don't you simply admit the obvious David? There are "lines" above Nyquist. Not "a cyclical pattern of something we interpret as a patch of lines" ... Go ahead, use the simple identifier which all here use in common sense language - "lines."

You're trying to change the subject to avoid the inevitable conclusion and the purpose of my post. This is not about "resolution" it's about whether or not the subject of the photograph is represented above Nyquist. It's not about what would be the result if an AA filter was "glued" on a Foveon sensor.

The simple and unavoidable conclusion is that there are "lines" below and above Nyquist - it's that simple so why add to obfuscation by attempting to go off on a tangent?

Lin

DMillier wrote:

Yes, as I have pointed out a number of times, there appears to a cyclical pattern of something that we interpret as a patch of lines, followed by a fuzzy, faded bit followed by another bit that looks like we imagine ought to be there, followed by another bit that is fuzzy and faded.

If you take a conservative approach and go up the scale to find the point where you get nine clean unambiguous unbroken lines, one would have to conclude that the actual resolution was much lower than is commonly reported. Aliasing is being mistaken for detail. Imaging resource seem to be doing things differently: they report the resolution as nearer 24 than 30MP equiivent - but they are generally quite a bit more conservative than DPR. Reading a chart is a judgement call I guess.

Someone needs to rip an AA filter out of another camera and glue it to a Foveon sensor so we can see what a Foveon image can really do without the aliasing confusing things.

--
Galleries and website: http://www.whisperingcat.co.uk/
Flickr: http://www.flickr.com/photos/davidmillier/

--
learntomakeslidshows.net

Reply   Reply with quote   Complain
Post (hide subjects)Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark post MMy threads
Color scheme? Blue / Yellow