In praise of AA filters

Started Oct 23, 2013 | Discussions thread
Lee Jay
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Re: Detail above Nyquist in MTF
In reply to rovingtim, Oct 27, 2013

Lee Jay wrote:

Using the slanted line method of oversampling. That's s special case and no real detail can be found that way.

That has been my point all along. Software is 'creating' the appearance of detail over Nyquist in digital files.

Wrong. That method doesn't even create images at all. It essentially analyzes a slanted edge for aliasing to produce a frequency domain plot. It requires a large slanted edge in the image covering a large number of pixels and it requires foreknowledge of that edge's existence.
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