DeHalo alpha

Revision as of 05:33, 8 November 2013

Introduction

Reduce halo artifacts that can occur when sharpening.

Required Filters

• MaskTools2 2.0a48+
• Repair.dll - part of the RemoveGrain package.

Syntax and Parameters

DeHalo_alpha(clip clp, float "rx", float "ry", float "darkstr", float "brightstr", float "lowsens", float "highsens", float "ss")

rx, ry float = 2.0

Range: 1.0 - 3.0

As usual, the radii for halo removal.

Note: This function is rather sensitive to the radius settings.

Set it as low as possible! If radius is set too high, it will start missing small spots.

darkstr, brightstr float = 1.0

Range: 0.0 - 1.0 [<0.0 and >1.0 possible]

The strength factors for processing dark and bright halos. Default 1.0 both for symmetrical processing.

On Comic/Anime, darkstr=0.4~0.8 sometimes might be better ... sometimes.

In General, the function seems to preserve dark lines rather well.

lowsens, highsens int = 50

Range: 0 - 100

Sensitivity settings, not that easy to describe them exactly ...

In a sense, they define a window between how weak an achieved effect has to be to get fully accepted, and how strong an achieved effect has to be to get fully discarded.

Defaults are 50 and 50 ... try and see for yourself.

ss float = 1.5

Range: 1.0 - ???

Supersampling factor, to avoid creation of aliasing.

Examples

AviSource("Blah.avi")
DeHalo_alpha()

Changelog

 Changes 2006-01-31
     - Changed syntax to use MaskTools2

 Changes 2005-11-15:
     - Initial release

External Links

• Doom9 Forum - DeHalo alpha discussion.