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On 9/30/18 5:43 PM, clipka wrote:
> More:
>
> (7) Output File Dithering:
>
> The following dithering algorithms are supported:
>
> + Ordered dithering algorithms:
>
> - `B2`..`B4`: Bayer pattern dithering using 2x2, 3x3 or 4x4 patterns,
> respectively
> - `BN`: {{New}} in version 3.8, blue noise pattern dithering using a
> 64x64 pattern.
> - `BNX`: {{New}} in version 3.8, same as BN, but using the pattern's
> inverse for the R and B channels.
>
> + Error diffusion dithering algorithms:
>
> - `AT`: {{New}} in version 3.8, Atkinson error diffusion dithering
> - `BK`: {{New}} in version 3.8, Burkes error diffusion dithering
> - `D1`: Simple 1-dimensional error diffusion dithering
> - `D2`: Sierra Lite error diffusion dithering
> - `FS`: Floyd-Steinberg error diffusion dithering
> - `JN`: {{New}} in version 3.8, Jarvis-Judice-Ninke error diffusion
> dithering
> - `S2`: {{New}} in version 3.8, Two-Row Sierra error diffusion dithering
> - `S3`: {{New}} in version 3.8, Three-Row Sierra error diffusion dithering
> - `ST`: {{New}} in version 3.8, Stucki error diffusion dithering
>
> [Not for docs: Absence of extra memory requirements info is deliberate;
> the extra memory should be negligible in all but highly pathological
> cases. Also, current info is no longer accurate, as requirements for D2
> and FS have changed.]
>
> {{New}} in version 3.8, the default is `-THbn`, i.e: dithering is off,
> with `BN` being the default if only `+TH` is specified.
>
> {{New}} in version 3.8, dithering is fully gamma-aware, i.e the overall
> apparent brightness of the resulting image is faithfully reproduced.
>
>
> (8) Preview Window Dithering:
>
> In v3.8, the preview window always uses blue noise dithering [this was
> Bayer 4x4 in v3.7, but I can't find it documented anywhere except in the
> change logs].
these are done as well:
http://wiki.povray.org/content/Reference:File_Output_Options#Output_File_Dithering
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