In praise of AA filters

Started Oct 23, 2013 | Discussions thread
rovingtim
Veteran MemberPosts: 8,206
Like?
example
In reply to Lee Jay, Oct 25, 2013

Lee Jay wrote:

rovingtim wrote:

Lee Jay wrote:

rovingtim wrote:

I would suggest manufacturers are attempting to 'complete' the information obtained at 0.6 (etc) using software solutions.

I don't know of any way to do that. It's just superposition in the frequency domain that makes this stuff look weird.

The way that comes to mind is to continue the patterns and colours known within Nyquist and extend/alter according to the partial information showing up beyond Nyquist.

That isn't really possible. "Beyond Nyquist" doesn't exist in either the original data or in the final image. The only way to expand the Nyquist frequency in the final image is to up-sample. So, if you get a final image of the same pixel dimensions as the sensor, there is no "beyond Nyquist" in that either.

-- hide signature --

Lee Jay
(see profile for equipment)

This is a bird's folded wing surrounded by feathers. The bold diagonals should be plain, but a couple of them have become 'ropey' with a pattern that matches the feathers above them. Why?

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