State of the art in upsizing algorithms?

Started Jun 9, 2014 | Discussions thread
Nicolas Robidoux Forum Member • Posts: 84
Re: State of the art in upsizing algorithms ?

With less halo, thanks to the use of the EWA RobidouxSoft cubic filter, but more aliasing (using Elliptical Weighted Averaging with the standard smoothing cubic B-spline, a.k.a. Spline in ImageMagick, reduces the aliasing):

CONTRAST=25 && INFLEXION=85 && magick input.png -colorspace RGB +sigmoidal-contrast $CONTRAST,$INFLEXION% -define filter:c=.1601886205085204 -filter Cubic -distort Resize 300% -sigmoidal-contrast $CONTRAST,$INFLEXION% -colorspace sRGB output.png

3x enlargement with sigmoidized EWA filtering with the RobidouxSoft Keys cubic

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