yuvycsnoise.1

Motion JPEG编解码器源代码

.TH "yuvycsnoise" "1" "5 February 2002" "MJPEG Linux Square" "MJPEG tools manual"

.SH NAME
yuvycsnoise \- Noise filter specialized for NTSC Y/C separation noise

.SH SYNOPSIS
.B yuvycsnoise
.RB [ \-t ]
.RB [ \-m\ t | b | i | c ]
.RB [ \-S
.IR MIN ]
.RB [ \-T
.IR ERRT [\fB,\fP MAXT ]]
.RB [ \-B
.IR ERRB [\fB,\fP MAXB ]]
.RB [ \-I
.IR ERRI [\fB,\fP MAXI ]]
.RB [ \-C
.IR ERRC [\fB,\fP MAXC ]]

.SH DESCRIPTION
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.
\fByuvycsnoise\fP reduces noises of this type.

.SH OPTIONS
\fByuvycsnoise\fP accepts the following options:
.TP 8
.BI \-t
test. Instead of noise reduction, noises will be marked as black pixel.
.TP 8
.BI \-m \ METHOD
(default: \fBtbic\fP).
.br
Select method.
\fIMETHOD\fP is string in which each character mean method.
 \fBt\fP: 'triframe' method of luma noise reduction.
 \fBb\fP: 'biframe' method of luma noise reduction.
 \fBi\fP: 'infield' method of luma noise reduction.
 \fBc\fP: chroma noise reduction. use 3 frames as 'triframe'.
.TP 8
.BI \-S \ MIN
(default: 4).
.br
Set minimum threshold of luma/chroma difference
which is treated as noise.
.TP 8
.BI \-T \ ERRT \fR[\fP, MAXT\fR]\fP
(default: 32,255).
.TP 8
.BI \-B \ ERRB \fR[\fP, MAXB\fR]\fP
(default: 32,255).
.TP 8
.BI \-I \ ERRI \fR[\fP, MAXI\fR]\fP
(default: 16,255).
.TP 8
.BI \-C \ ERRC \fR[\fP, MAXC\fR]\fP
(default: 12,255).
.br
Set threshold of luma/chroma difference of each methods.
\fIERRx\fP is maximum error of luma/chroma of pixels around
target pixel, which should be same if target contain noise.
\fIMAXx\fP is maximum threshold of luma/chroma difference of
target pixel from luma/chroma after noise reduced.

.SH AUTHOR
\fByuvycsnoise\fP was written by Kawamata/Hitoshi.
.br
If you have questions, remarks, problems or you just want to contact
the developers, the main mailing list for the MJPEG\-tools is:
  \fImjpeg\[e-mail]\fP

.TP
For more info, see our website at
.I http://mjpeg.sourceforge.net/

.SH SEE ALSO
.BR mjpegtools (1)