State of the art in upsizing algorithms?

Started Jun 9, 2014 | Discussions thread
JimKasson Forum Pro • Posts: 30,004
Re: Frequency domain

Mark Scott Abeln wrote:

My experience with frequency domain processing was disappointing, but I admit that I really don’t remember most of the math, except vaguely. Certainly, loss of precision is important, and I’m seeing a number of places where lack of precision in general harms the final image. Perhaps this is a good opportunity to experiment with extended precision arithmetic in Mathematica or whatever else is out there — since I’m concerned with a one-off image, long processing times is hardly an issue. However, I do need speed for the typical large project that I do a couple times a year.

I am in general suspicious of assuming viewing distances, but, if you do that, one potential advantage of fequency domain approaches is the ability to throw the human contrast sensitivity functions into the mix.

With respect to precision, you're using Octave, right? I use Matlab, which I think is very similar. In Matlab, you have to work at it to get the code to use anything less than 64-bit floating point.


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