Cnr2
From Avisynth wiki
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| Temporal Denoisers | | Temporal Denoisers | ||
| [http://www.gnu.org/licenses/gpl-2.0.txt GPLv2] | | [http://www.gnu.org/licenses/gpl-2.0.txt GPLv2] | ||
| − | |}} | + | |6=[http://forum.doom9.org/showthread.php?t=78905 Doom9 Thread]}} |
<br> | <br> | ||
== Description == | == Description == | ||
| − | + | This filter is a Chroma Stabilizer for analog sources. It's a temporal filter and it's very effective against two chroma artifacts: Stationary rainbows and huge analog chroma activity.<br> | |
| − | + | Cnr2 was inspired by the VirtualDub filter [http://web.archive.org/web/20041205081740/http://freevcr.ifrance.com/freevcr/virtualdub/cnr-en.html Chroma Noise Reduction 1.1] by Gilles Mouchard.<br> | |
<br> | <br> | ||
| − | == Requirements | + | == Requirements == |
| − | + | * AviSynth 2.5.8 or later | |
| − | + | * [[FAQ_different_types_content#How_do_I_recognize_progressive.2C_interlaced.2C_telecined.2C_hybrid_and_blended_content.3F|Progressive]] input only | |
| − | + | * Supported color formats: [[YUY2]], [[YV12]] | |
<br> | <br> | ||
== [[Script variables|Syntax and Parameters]] == | == [[Script variables|Syntax and Parameters]] == | ||
:{{Template:FuncDef|Cnr2 (''clip'', ''string'' "mode", ''float'' "scdthr", ''int'' "ln", ''int'' "lm", ''int'' "un", ''int'' "um", ''int'' "vn", ''int'' "vm", ''bool'' "log", ''bool'' "sceneChroma")}} | :{{Template:FuncDef|Cnr2 (''clip'', ''string'' "mode", ''float'' "scdthr", ''int'' "ln", ''int'' "lm", ''int'' "un", ''int'' "um", ''int'' "vn", ''int'' "vm", ''bool'' "log", ''bool'' "sceneChroma")}} | ||
<br> | <br> | ||
| − | ::{{Par2|mode|string| "oxx"}} | + | ::{{Par2| |clip| }} |
| − | ::: | + | :::Input clip. |
| − | + | <br> | |
| − | + | ::{{Par2|mode|string|"oxx"}} | |
| + | :::Mode of each components, "[[YUV]]": | ||
| + | ::::* o : wide | ||
| + | ::::* x : narrow; this mode is more sensible to variations, and less effective.<br> | ||
<br> | <br> | ||
::{{Par2|scdthr|float|10.0}} | ::{{Par2|scdthr|float|10.0}} | ||
| − | + | :::Scene change detection threshold (as percentage of maximum possible change): | |
| − | + | ::::If {{Template:FuncDef|sceneChroma}} is set to true, then it is the maximum possible change including both luma and chroma. | |
| − | + | ::::If {{Template:FuncDef|sceneChroma}} is set to false then it is the maximum possible change considering luma only (luma only is more reliable). | |
| − | + | :::Lower it to make scene change detection more sensible. If a scene change is detected, Cnr2 will reset the filtering for the new scene. | |
<br> | <br> | ||
::{{Par2|ln|int|35}} | ::{{Par2|ln|int|35}} | ||
| Line 37: | Line 40: | ||
::{{Par2|vn|int|47}} | ::{{Par2|vn|int|47}} | ||
::{{Par2|vm|int|255}} | ::{{Par2|vm|int|255}} | ||
| − | ::: | + | ::: l parameters control the luma channel, u and v corresponds to the U/V chroma channels respectively. |
| − | + | :::The ''n'' values are the movement sensibility; higher values will denoise more, but could produce ghosting artifacts. | |
| + | :::The ''m'' values are the maximum effectiveness of the denoiser; lower them to reduce the denoising effect. | ||
| − | :::: | + | :::Range: 0 to 255 |
<br> | <br> | ||
::{{Par2|log|bool|false}} | ::{{Par2|log|bool|false}} | ||
| − | + | :::Log the scene change stats (output them using OutputDebugString). You can use [http://technet.microsoft.com/en-us/sysinternals/bb896647.aspx DebugView] to see it. | |
| − | + | :::It will simply list the detected change, the maximum allowable change for the current {{Template:FuncDef|scdthr}} setting, and the ratio (at 1.0 or greater a scene change has occurred). | |
<br> | <br> | ||
::{{Par2|sceneChroma|bool|false}} | ::{{Par2|sceneChroma|bool|false}} | ||
| − | + | :::Sets whether or not both chroma and luma are considered on scene change detection (true), or only luma (false). | |
| − | + | :::Luma only detection tends to be more reliable. | |
<br> | <br> | ||
== Examples == | == Examples == | ||
Revision as of 03:59, 19 September 2014
| Abstract | |
|---|---|
| Author | Marc FD |
| Version | v2.6.1 |
| Download | cnr2_v261.zip |
| Category | Temporal Denoisers |
| License | GPLv2 |
| Discussion | Doom9 Thread |
Contents |
Description
This filter is a Chroma Stabilizer for analog sources. It's a temporal filter and it's very effective against two chroma artifacts: Stationary rainbows and huge analog chroma activity.
Cnr2 was inspired by the VirtualDub filter Chroma Noise Reduction 1.1 by Gilles Mouchard.
Requirements
- AviSynth 2.5.8 or later
- Progressive input only
- Supported color formats: YUY2, YV12
Syntax and Parameters
- Cnr2 (clip, string "mode", float "scdthr", int "ln", int "lm", int "un", int "um", int "vn", int "vm", bool "log", bool "sceneChroma")
- clip =
- Input clip.
- clip =
- string mode = "oxx"
- Mode of each components, "YUV":
- o : wide
- x : narrow; this mode is more sensible to variations, and less effective.
- Mode of each components, "YUV":
- string mode = "oxx"
- float scdthr = 10.0
- Scene change detection threshold (as percentage of maximum possible change):
- If sceneChroma is set to true, then it is the maximum possible change including both luma and chroma.
- If sceneChroma is set to false then it is the maximum possible change considering luma only (luma only is more reliable).
- Lower it to make scene change detection more sensible. If a scene change is detected, Cnr2 will reset the filtering for the new scene.
- Scene change detection threshold (as percentage of maximum possible change):
- float scdthr = 10.0
- int ln = 35
- int lm = 192
- int un = 47
- int um = 255
- int vn = 47
- int vm = 255
- l parameters control the luma channel, u and v corresponds to the U/V chroma channels respectively.
- The n values are the movement sensibility; higher values will denoise more, but could produce ghosting artifacts.
- The m values are the maximum effectiveness of the denoiser; lower them to reduce the denoising effect.
- int ln = 35
- Range: 0 to 255
- bool log = false
- Log the scene change stats (output them using OutputDebugString). You can use DebugView to see it.
- It will simply list the detected change, the maximum allowable change for the current scdthr setting, and the ratio (at 1.0 or greater a scene change has occurred).
- bool log = false
- bool sceneChroma = false
- Sets whether or not both chroma and luma are considered on scene change detection (true), or only luma (false).
- Luma only detection tends to be more reliable.
- bool sceneChroma = false
Examples
Cnr2 with default settings:
AviSource("Blah.avi") Cnr2(mode="oxx", scdthr=10.0, n=35, lm=192, un=47, um=255, vn=47, vm=255, log=false, sceneChroma=false)
Changelog
Version Date Developer Changes
v2.6.1 2004/06/30 tritical - YUY2 opts as I had slowed it down v2.6 2004/06/29 tritical - Some bug fixes and some code cleanup and rewriting v2.51 2003/11/18 Klaus Post - Further bug fixes v2.5 2003/11/13 Klaus Post - Bug fixes v2.4 2002/12/15 Marc FD - Bug fixes v2.3 2002/11/13 Marc FD - YV12 mode, scd (scene change detection) v2.2 2002/08/01 Marc FD - Ugly bug fixed v2.1 2002/07/31 Marc FD - Bug Fixes (thanks to dividee ;) v2.0 2002/07/20 Marc FD - Initial release; AviSynth filter coded (from scratch)
Archived Downloads
| Version | Download | Mirror |
|---|---|---|
| v2.6.1 | cnr2_v261.zip | cnr2_v261.zip |
Links
- Doom9 Forum - Cnr2 discussion.
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