EEDI2
From Avisynth wiki
| Abstract | |
|---|---|
| Author | tritical |
| Version | v0.9.2 |
| Download | |
| Category | Deinterlacing |
| License | GPLv2 |
| Discussion | Doom9 Thread |
Contents |
Description
EEDI2 (Enhanced Edge Directed Interpolation) resizes an image by 2x in the vertical direction by copying the existing image to 2*y(n) and interpolating the missing field. It is intended for edge-directed interpolation for deinterlacing (i.e. not really made for resizing a normal image, but can do that as well).
- EEDI2_092_ICL13.7z is an optimized version built with Intel C++ Compiler 13. See discussion.
Requirements
Syntax and Parameters
- EEDI2 (clip, int "mthresh", int "lthresh", int "vthresh", int "estr", int "dstr", int "maxd", int "field", int "map", int "nt", int "pp")
- clip =
- Input clip.
- clip =
- int mthresh = 10
- int lthresh = 20
- int vthresh = 20
- These all control edge detection used for building the initial edge map.
- mthresh is the edge magnitude threshold... its range is from 0 to 255, lower values will detect weaker edges.
- lthresh is the laplacian threshold... its range is 0 to 510, lower values will detect weaker lines.
- vthresh is the variance threshold... its range is 0 to a large number, lower values will detect weaker edges.
- Use the "map" option to tweak these settings as needed.
- These all control edge detection used for building the initial edge map.
- int mthresh = 10
- int estr = 2
- int dstr = 4
- These are used for dilation and erosion of the edge map.
- estr sets the required number of edge pixels (<=) in a 3x3 area, in which the center pixel has been detected as an edge pixel, for the center pixel to be removed from the edge map.
- dstr sets the required number of edge pixels (>=) in a 3x3 area, in which the center pixel has not been detected as an edge pixel, for the center pixel to be added to the edge map.
- Use the "map" option to tweak these settings as needed.
- These are used for dilation and erosion of the edge map.
- int estr = 2
- int maxd = 24
- Sets the maximum pixel search distance for determining the interpolation direction.
- Larger values will be able to connect edges and lines of smaller slope but can lead to artifacts. Sometimes using a smaller maxd will give better results than a larger setting. The maximum possible value for maxd is 29.
- int maxd = 24
- int field = -1
- Controls which field in the resized image the original image will be copied too.
- When using AviSynth's internal parity value top field first (tff) = 1 and bottom field first (bff) = 0. Possible options:
- -2 = alternates each frame, uses AviSynth's internal parity value to start
- -1 = uses AviSynth's internal parity value
- 0 = bottom field
- 1 = top field
- 2 = alternates each frame, starts with bottom
- 3 = alternates each frame, starts with top
- int field = -1
- int map = 0
- Allows one of three possible maps to be shown. Possible settings:
- 0 - no map
- 1 - edge map (edge pixels will be set to 255 and non-edge pixels will be set to 0.)
- 2 - original scale direction map
- 3 - 2x scale direction map
- Allows one of three possible maps to be shown. Possible settings:
- int map = 0
- int nt = 50
- Defines a noise threshold between pixels in the sliding vectors, this is used to set initial starting values.
- Lower values should reduce artifacts but sacrifice edge reconstruction... while higher values should improve edge reconstruction but lead to more artifacts. The possible range of values is 0 to 256.
- int nt = 50
- int pp = 1
- Enables two optional post-processing modes aimed at reducing artifacts by identifying problems areas and then using plain vertical linear interpolation in those parts. The possible settings are:
- 0 - no post-processing
- 1 - check for spatial consistency of final interpolation directions
- 2 - check for junctions and corners
- 3 - do both 1 and 2
- Using the pp modes will slow down processing and can cause some loss of edge directedness.
- Enables two optional post-processing modes aimed at reducing artifacts by identifying problems areas and then using plain vertical linear interpolation in those parts. The possible settings are:
- int pp = 1
Examples
EEDI2 with default settings:
AviSource("blah.avi") EEDI2(mthresh=10, lthresh=20, vthresh=20, estr=2, dstr=4, maxd=24, field=-1, map=0, nt=50, pp=1)
Changelog
06/07/2006 v0.9.2
+ various internal changes to help reduce artifacts around repeated
patterns and to improve construction of lines/edges with small slope
- Changed map from bool to int
- Changed default maxd value from 12 to 24
- Changed default pp value from 0 to 1
- a few minor bugfixes
04/03/2006 v0.9.1
+ Added pp parameter and pp modes 1, 2, and 3
- A few minor internal changes
- Fixed some documentation errors (field parameter)
- do a vi.SetFieldBased(false) in constructor
- fixed a bug causing reads past the last line and incorrect interpolation
of the very top or very bottom line in some cases
11/29/2005 v0.9
- Initial release
Archived Downloads
| Version | Download | Mirror |
|---|---|---|
| v0.9.2 | EEDI2v092.zip |
External Links
- Doom9 Forum - EEDI2 discussion.
- Doom9 Forum - EEDI2 0.9.2 built with ICL13.
- Doom9 Forum - EEDI2 for VapourSynth.
- GitHub - HandBrake's EEDI2 port with nicely commented source code: eedi2.c, eedi2.h
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