Quote:
Originally Posted by pinterf
... In Avisynth - probably for quality reasons - there is a strategy: "// ensure that the intermediate area is maximal" ...
Now it's to be decided that the slower H/V or V/H decision strategy should be kept or not. Is the difference really visible and when?
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Quote:
Originally Posted by raffriff42
... how is the visible result of the AVS sequence ... any different from zimg's ...
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One can imagine the larger intermediate resolution would keep more original information for the second stage filtering: The more resolution/information as input would yield a better output from any filter.
An “objective” test could be done to measure the quality of the results of either strategy: Produce the results of both strategies: scale the original to whatever size (up/down), then scale them back to the original size, and finally measure the quality of both strategies, with say SSIM, against the original