Scale and Debayer settings - some examples

[HD Hildebrand]

The way many of such filters are typically implemented results in the violation of the certain principles of interpolation. If somebody is using sinc-derived filters such as Lanczos, or otherwise non-time/space limited filters (non-compact) you can be certain that the intensity of uniform areas may not be preserved all of the times. It does not have to be a resizing operation. One can rotate an image with these filters and still see an intensity shift. Unfortunately, even resampling to a finer and finer grid may not make the problem go away.

Is there a solution to avoid that? Of course, there is. But that will mean graduating to approaches that are different from a straight-forward implementation of apodization-based filtering.

I think your brain is larger then mine.

 

[Nigel Stanford]

So what resize filters, in your opinion, should one use to get the sharpest image and then the softest one?

Thanks for the tests.

softest looks like wide gauss, sharpest lanczos.

 

[Michael Mayda]

softest looks like wide gauss, sharpest lanczos.

Thanks for the great workup, Nigel. I was wondering about these settings but was too lazy to test them all.

Cheers!

Michael Mayda
Red1976 (Bicentennial)

 

[Ramesh Jai]

softest looks like wide gauss, sharpest lanczos.

Thank you. Really appreciate this test.

 

[Jonas Rejman]

Thank you as well!
Another post for the Purgatory Magazine listing. :watsup:

 

[zak forrest]

is there a resize that works best for noisy/underexposed footage? does a softer resize take the perceivable noise levels down a little bit do you think?

i'd test this myself but i'm pumpin blood

 

[Nigel Stanford]

is there a resize that works best for noisy/underexposed footage? does a softer resize take the perceivable noise levels down a little bit do you think?

i'd test this myself but i'm pumpin blood

Not sure, has anyone tested this?

 

[Andrew Saliga]

Thanks for the very useful post Nigel.