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Switch to Lanczos scaling from Hamming to get acceptable fast downscaling.

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In visual tests we see that Hamming-1 is not as good as
Lanczos-2, however it is about 40% faster, and Lanczos-2 itself is
about 30% faster than Lanczos-3. The use of Hamming-1 has been deemed
an unacceptable trade-off between quality and speed due to the limited
pixel space it operates in, so we pick Lanczos-2 here.
On modern hardware, Lanczos-2 doesn't have any noticeable impact
in normal use.
This commit is contained in:
wolfbeast 2018-07-14 05:11:39 +02:00 • committed by Roy Tam
commit d203062c4e
2 changed files with 11 additions and 16 deletions
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config/milestone.txt
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@ -10,4 +10,4 @@
# hardcoded milestones in the tree from these two files.
#--------------------------------------------------------
4.1.3
4.1.4