From e15619e70d90f3a46dab6c82da077b2fdfb25003 Mon Sep 17 00:00:00 2001 From: dokur0chan <139610756+dokur0chan@users.noreply.github.com> Date: Sat, 9 Sep 2023 15:58:40 -0400 Subject: DOCS/options: add catmull_rom as an example for --scale Adds catmull_rom as an example for --scale in the user manual, alongside a brief description of the filter. catmull_rom was only exposed to users as an available filter through --scale=help. However, catmull_rom is very often aliased as "Bicubic" in other applications such as GIMP and VapourSynth, and is a relatively popular resizing filter. The documentation lacked any description of catmull_rom, outside of a brief mention of it in the --tscale section. --- DOCS/man/options.rst | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'DOCS/man') diff --git a/DOCS/man/options.rst b/DOCS/man/options.rst index 7d1a1d91fd..bfc815649c 100644 --- a/DOCS/man/options.rst +++ b/DOCS/man/options.rst @@ -5284,6 +5284,13 @@ them. ``--scale-param1`` and ``--scale-param2``. This filter is very good at downscaling (see ``--dscale``). + ``catmull_rom`` + Catmull-Rom. A Cubic filter in the same vein as ``mitchell``, where + the ``B`` and ``C`` parameters are ``0.0`` and ``0.5`` respectively. + This filter is sharper than ``mitchell``, but it results in mild + ringing. Like ``mitchell``, this filter is good at downscaling (see + ``--dscale``). + ``oversample`` A version of nearest neighbour that (naively) oversamples pixels, so that pixels overlapping edges get linearly interpolated instead of -- cgit v1.2.3