TComb
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== Examples == | == Examples == | ||
[[AviSource]]("Blah.avi") | [[AviSource]]("Blah.avi") | ||
Revision as of 14:37, 13 November 2013
| Abstract | |
|---|---|
| Author | tritical |
| Version | v2.0 Beta 2 |
| Download | TComb |
| Category | Rainbow & Dot Crawl Removal |
| Requirements |
|
| License | GPL |
| Discussion | |
Contents |
Description
- TComb is a temporal comb filter (it reduces cross-luminance (rainbowing) and cross-chrominance (dot crawl) artifacts in static areas of the picture).
- It will ONLY work with NTSC material, and WILL NOT work with telecined material where the rainbowing/dotcrawl was introduced prior to the telecine process!
- It must be used before ivtc or deinterlace in order to work. In terms of what it does it is similar to guavacomb/dedot.
- TComb does support seeking... that is, jumping to a random frame will produce the same result as if you had linearly run up to that frame.
- For dot crawl removal tcomb requires at least 3 static fields of the same parity and for rainbow removal tcomb requires at least 5 static fields of the same parity.
Requirements:
Syntax and Parameters
- TComb(int "mode", int "fthreshL", int "fthreshC", int "othreshL", int "othreshC", bool "map", float "scthresh", bool "debug", int "opt")
- mode int = 2
- Controls whether both luma/chroma are processed or only one or the other. Possible settings:
- mode int = 2
- 0 - process luma only (dot crawl removal)
- 1 - process chroma only (rainbow removal)
- 2 - process both
- - default: 2 (int).
- fthreshL int = 4
- fthreshC int = 5
- Filtered pixel correlation thresholds.
- fthreshL int = 4
- One of the things TComb checks for is correlation between filtered values over the length of the filtering window.
- If all values differ by less than fthreshL (for luma) or fthreshC (for chroma) then the filtered values are considered to be correlated.
- Larger values will allow more filtering (will be more effective at removing rainbowing/dot crawl), but will also create more artifacts.
- Smaller values will produce less artifacts, but will be less effective in removing rainbowing/dot crawl. A good range of values is between 4 and 7.
- - default: fthreshL -> 4 (int)
- fthreshC -> 5
- - default: fthreshL -> 4 (int)
- othreshL int = 5
- othreshC int = 6
- Original pixel correlation thresholds.
- othreshL int = 5
- One of the things TComb checks for is correlation between original pixel values from every other field of the same parity.
- Due to the oscillation period, these values should be equal or very similar in static areas containing dot crawl or rainbowing.
- If the pixel values differ by less than othreshL (for luma) or othreshC (for chroma) then the pixels are considered to be correlated.
- Larger values will allow more filtering (will be more effective at removing rainbowing/dotcrawl), but will also create more artifacts.
- Smaller values will produce less artifacts, but will be less effective in removing rainbowing/dotcrawl.
- A good range of values is between 4 and 8.
- - default: othreshL -> 5 (int)
- othreshC -> 6
- - default: othreshL -> 5 (int)
- map bool = false
- Identifies pixels that are being replaced with filtered values.
- Each pixel in the output frame will have one of the following values indicating how it is being filtered:
- map bool = false
0 - not being filtered
85 - [1 2 1] average of (n,n+1,n+2)
170 - [1 2 1] average of (n-2,n-1,n)
255 - [1 2 1] average of (n-1,n,n+1)
** n = current frame
Examples
AviSource("Blah.avi") checkmate()
Changelog
:
- Initial release
