Thread: Avisynth+
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Old 27th January 2018, 17:56   #3915  |  Link
VS_Fan
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Quote:
Originally Posted by pinterf View Post
... 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?
Quote:
Originally Posted by raffriff42 View Post
... how is the visible result of the AVS sequence ... any different from zimg's ...
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
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