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Old 12th September 2004, 20:48   #1  |  Link
tritical
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Join Date: Dec 2003
Location: MO, US
Posts: 999
TDeint and TIVTC

Well I made a new motion adaptive deinterlacer/smart bobber called TDeint. The main three reasons for its existence are it is bi-directionally motion adaptive... meaning if you have the following field and pixel sequence, where '-' is the pixel position to be filled:
Code:
a   d   g   j   m
  c   f - i   l
b   e   h   k   n
Then TDeint will try either weaving the average of f and i, or simply f or i based on the motion in the surrounding pixels. Afaik, the only deinterlacer that currently does this is scharfis_brain's intellibob. All other motion adaptive deinterlacers currently only weave whatever pixel gets weaved into the current frame by default. That means that all pixels will be detected as moving in the first frame after a scene change. (If I am wrong about this and another deinterlacer already does this please tell me!).

Second, this filter is using a new form of modified ELA interpolation that I have been working on recently. It takes into account the direction of the normal line to the gradient vector when deciding in which direction to average, and attempts to tune the interpolation so that it can adapt to any edge direction within its range. In terms of quality, it is better then plain 5+5 tap ela as in tomsmocomp, but not quite as good as some other techniques such as NEDI or edge post processing as in antialiasing that sangnom uses. The nice thing about this method, though, is that it is still pretty fast (running about 30fps in dumbbob mode on 720x480 images on my comp). For comparison, here are a few images of a simple dumbbob (no motion adaptation), the first was made using this modified form of ELA, the second was made using tomsmocomp(-1,-1,0) (5+5 tap ela w/ clipping), the third was made using AviSynth's built in bob which uses cubic interpolation, the fourth was made using sangnom(aa=0), and the last was made using sangnom().

modified ELA
tomsmocomp(-1,-1,0)
AviSynth's Bob (cubic)
sangnom(aa=0)
sangnom()

Third and finally, it has support for user overrides. Not only allowing the user to set which frames should be deinterlaced as fielddeinterlace() does, but also allowing the meaningful parameters to be adjusted for single frames or ranges of frames. Also, when working as a same frame rate deinterlacer it allows the user to control which field is kept and which field is interpolated.

Anyways, the reason I posted this in the development forum was that I don't really have much if any true interlaced material to test with, aside from what I can capture here in my dorm room. Thing is, we have about the worst cable reception known to man so its hard to tell if a deinterlacer is any good. I was hoping someone with some true interlaced material would be inclined to test it a little or someone could send me a few interlaced clips to test with to make sure everything works alright. It does seem to work great as a per pixel field matcher, as I have only been testing it with telecined material from dvds. With default settings the filter runs around 45-55fps on my 2.2Ghz p4.

TDeint v1.1

TIVTC v1.0.5

EEDI2 v0.9.2

TMM v1.0

avi_tc_package v1.5

If you're looking for older versions try: old_stuff

Last edited by tritical; 17th January 2008 at 08:26.
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