'\" te
.TH tiff2bw 1 "26 Mar 2004" "SunOS 5.11" "User Commands"
.SH "NAME"
tiff2bw \- convert
a color TIFF image to grayscale
.SH "SYNOPSIS"
.PP
\fBtiff2bw\fR [\fB\fIoptions\fR\fR] \fB\fIinput\&.tif\fR\fR \fB\fIoutput\&.tif\fR\fR
.SH "DESCRIPTION"
.PP
\fBtiff2bw\fR converts an RGB or palette color TIFF image
to a grayscale image by combining percentages of the red, green, and blue
channels\&. By default, output samples are created by taking 28% of the red
channel, 59% of the green channel, and 11% of the blue channel\&. To alter these
percentages, use the -\fBR\fR\&. -\fBG\fR, and -\fBB\fR options\&.
.SH "OPTIONS"
.PP
The following options are supported:
.sp
.ne 2
.mk
\fB-\fBB\fR\fR
.in +16n
.rt
Specify the percentage
of the blue channel to use\&. The default value is 11\&.
.sp
.sp 1
.in -16n
.sp
.ne 2
.mk
\fB-\fBc\fR\fR
.in +16n
.rt
Specify a compression
scheme to use when writing image data:
.sp
.sp
.ne 2
.mk
\fB-\fBc g3\fR\fR
.in +24n
.rt
CCITT Group
3 compression algorithm\&.
.sp
.sp 2
.in -24n
.sp
.ne 2
.mk
\fB-\fBc g4\fR\fR
.in +24n
.rt
CCITT Group
4 compression algorithm\&.
.sp
.sp 1
.in -24n
.sp
.ne 2
.mk
\fB-\fBc lzw\fR\fR
.in +24n
.rt
Lempel-Ziv
and Welch algorithm\&. This is the default algorithm\&.
.sp
.sp 1
.in -24n
.sp
.ne 2
.mk
\fB-\fBc none\fR\fR
.in +24n
.rt
No compression\&.
.sp
.sp 1
.in -24n
.sp
.ne 2
.mk
\fB-\fBc packbits\fR\fR
.in +24n
.rt
PackBits
compression algorithm\&.
.sp
.sp 1
.in -24n
.sp
.ne 2
.mk
\fB-\fBc zip\fR\fR
.in +24n
.rt
Deflate compression
algorithm\&.
.sp
.sp 1
.in -24n
.sp 0
.in -16n
.sp
.ne 2
.mk
\fB-\fBG\fR\fR
.in +16n
.rt
Specify the percentage
of the green channel to use\&. The default value is 59\&.
.sp
.sp 1
.in -16n
.sp
.ne 2
.mk
\fB-\fBR\fR\fR
.in +16n
.rt
Specify the percentage
of the red channel to use\&. The default value is 28\&.
.sp
.sp 1
.in -16n
.sp
.ne 2
.mk
\fB-\fBr\fR\fR
.in +16n
.rt
Write data with
a specified number of rows per strip\&. By default, the number of rows per strip
is selected so that each strip is approximately 8 kilobytes\&.
.sp
.sp 1
.in -16n
.SH "OPERANDS"
.PP
The following operands are supported:
.sp
.ne 2
.mk
\fB\fB\fIinput\&.tif\fR\fR\fR
.in +16n
.rt
The name of the input TIFF file\&.
.sp
.sp 1
.in -16n
.sp
.ne 2
.mk
\fB\fB\fIoutput\&.tif\fR\fR\fR
.in +16n
.rt
The name of the output file\&.
.sp
.sp 1
.in -16n
.SH "ATTRIBUTES"
.PP
See \fBattributes\fR(5)
for descriptions of the following attributes:
.sp
.TS
tab() allbox;
cw(2.750000i)| cw(2.750000i)
lw(2.750000i)| lw(2.750000i).
ATTRIBUTE TYPEATTRIBUTE VALUE
Availabilityimage/library/libtiff
Interface stabilityUncommitted
.TE
.sp
.SH "SEE ALSO"
.PP
\fBpal2rgb\fR(1), \fBtiffinfo\fR(1), \fBtiffcp\fR(1), \fBtiffmedian\fR(1), \fBlibtiff\fR(3)
.SH "NOTES"
.PP
Updated by Breda McColgan, Sun Microsystems Inc\&., 2004\&.
...\" created by instant / solbook-to-man, Thu 20 Mar 2014, 02:30
...\" LSARC 2003/085 libtiff, libjpeg, and libpng