AWarpSharp2

Revision as of 04:11, 2 February 2014

Description

This filter implements the same warp sharpening algorithm as aWarpSharp by Marc FD, but with several bugfixes and optimizations.

In addition to the complete aWarpSharp2 algorithm, parts of the algorithm are also available as aSobel, aBlur, aWarp. This allows for more advanced processing.

Requirements

- AviSynth 2.5.8 or later

- Progressive input only

- Supported color formats: YV12

- MMXExt capable CPU, blur will be more precise around frame borders if SSSE3 is available.

Common Parameters

thresh int = 128

Range: 0 to 255

Saturation limit for edge detection. Reduce for less aggressive sharpening.

blur int = 2 for type 0, 3 for type 1

Range: 0 to 100

Number of blur passes over edge mask.

Less passes increase sharpening effect, but can produce major artifacts with high depth and thresh.

You can use values higher than 100, but probably won't see any difference.

Chroma is processed with (blur+1)/2 passes.

type int = 0 for aWarpSharp2, 1 for aBlur

Type of blur:

• 0 : radius 6 blur.
• 1 : radius 2 blur, requires around 8x more passes than type 0 for the same effect (will be just 2.5x slower), but produce better quality.

depth int = 16 for aWarpSharp2, 3 for aWarp and aWarp4

Range: -128 to 127

Strength of the final warping. Negative values result in warping in opposite direction.

chroma int =

Processing mode for chroma planes (U and V):

• 0 : fill with zeroes
• 1 : don't care, default for aSobel and aBlur
• 2 : copy
• 3 : process
• 4 : guide by luma - default for aWarpSharp, aWarp, and aWarp4 only
• 5 : same as 3, but luma isn't processed and just copied. Useful for filtering sources with certain chroma problems.
• 6 : same as 4, but luma isn't processed and just copied. Useful for filtering sources with certain chroma problems.

Filters

Changelog

Version           Date             Changes

2012.03.28      2012/03/28       - Added new final part aWarp4 that takes 4x upsampled source for better final subpixel interpolation.
                                   - aWarpSharp2 can now be also called by aWarpSharp() with internal parameters conversion for compatibility 
                                     with ancient scripts. Direct aWarpSharp2 call is encouraged though.
                                   - New chroma values: 5 and 6: the same as 3 and 4, but luma isn't processed and just copied. Useful for 
                                     filtering sources with certain chroma problems.
                                   - Changed some defaults.

2009.06.19      2009/06/19       - renamed main filter from aWarpSharp to aWarpSharp2 for less confusion with original aWarpSharp
                                   - fixed wrong offsets in Warp
                                   - added new blur type - produce better quality, but around 2.5x slower
                                   - blur will be more precise around frame borders if SSSE3 is available
                                   - some optimizations, mostly noticeable on Core2
                                   - removed support for undocumented parameters of original aWarpSharp

2009.05.24      2009/05/24       - Initial release

Links

- Doom9 Forum - Discussion about aWarpSharp2.