Section: MJPEG tools manual (1)
Updated: 5 February 2002
yuvycsnoise - Noise filter specialized for NTSC Y/C separation noise
If video capture hardware has only a poor Y/C separator,
at vertical stripe (especially red/blue), noises appear
which seem checker flag and bright/dark invert per 1 frame.
reduces noises of this type.
accepts the following options:
test. Instead of noise reduction, noises will be marked as black pixel.
- -m METHOD
METHOD is string in which each character mean method.
t: 'triframe' method of luma noise reduction.
b: 'biframe' method of luma noise reduction.
i: 'infield' method of luma noise reduction.
c: chroma noise reduction. use 3 frames as 'triframe'.
- -S MIN
Set minimum threshold of luma/chroma difference
which is treated as noise.
- -T ERRT[,MAXT]
- -B ERRB[,MAXB]
- -I ERRI[,MAXI]
- -C ERRC[,MAXC]
Set threshold of luma/chroma difference of each methods.
ERRx is maximum error of luma/chroma of pixels around
target pixel, which should be same if target contain noise.
MAXx is maximum threshold of luma/chroma difference of
target pixel from luma/chroma after noise reduced.
was written by Kawamata/Hitoshi.
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