gradfun2db (clip, float "thr") 


        clip   =

            Input clip. 


        float  thr = 1.2

            Threshold representing the strength of the filter; default value is 1.2. 




Coders : 

The code is separated from avisynth, and can act as a standalone library. The files you'll need
are "gradfun.cpp", "gradfun.h" and "gradfun.asm". Have a look at gradfun.h to see how to use it
(it's pretty simple, really).

The avisynth filter's code can be seen as the sample code for the "library".

GradFun2DBmod (clip input, float "thr", float "thrC", int "mode", float "str", float "strC", int "temp", int "adapt", string "custom", bool "mask", int "radius", int "range", bool "show", int "screenW", int "screenH")

    clip  input =

        Input clip. 

Dither

    float  thr = 1.2

        GradFun2db "thr" parameter; threshold representing the strength of the filter on the luma channel. 

    float  thrC = 1.2

        Same as thr but for the chroma channels. If this parameter is not specified it defaults to the value of thr. 

    int  mode = 2

        Mode for the addition of 16 pixels around the image. Turning this parameter off will leave the outer 16 pixels on all borders unprocessed, this is a limitation of GradFun2db. 

         
         0 = Off                             [same as GradFun2db]
         1 = AddBorders  (speed:+ quality:-) [same as GradFunk]
         2 = PointResize (speed:+ quality:+) [recommended]
         3 = Flip/Stack  (speed:- quality:+) [same as GradFunkMirror]

Grain

    float  str = 0.8

        AddGrainC "var" parameter; the standard deviation (strength) of the luma noise, 0.0 is disabled. 

    float  strC = 0.0

        AddGrainC "uvar" parameter; the standard deviation (strength) of the chroma noise, 0.0 is disabled (default). 

    int  temp = 50

        Strength for temporal stabilization.

            -1 = off
            0 = nervous grain
            50 = half and half
            100 = calm grain 

        Range: -1 to 100 

    int  adapt = 64

        Threshold for luma-adaptative grain.

            -1 = off
            0 = source
            255 = invert 

        Range: -1 to 255 

    string  custom = "empty"

        Use your own grain generator instead of AddGrainC (temp & adapt parameters are on, set -1 to turn off). 

Mask

    bool  mask = true

        Use adaptative deband mask(dither/grain is only applied to areas with banding's susceptibility). 

    int  radius = 2

        Radius for the mask (1 is the fastest, 2-3 are slower) 

    int  range = 2

        Range used in the mask (1-3 are good value) 

Debug

    bool  show = false

        Show debug clip & information [1]. 

    int  screenW = 1280
    int  screenH = 1024

        Screen resolution (for show clip).