NAME¶
tiffsv - save an image from the framebuffer in a
TIFF file
(Silicon Graphics version)
SYNOPSIS¶
tiffsv [
options ]
output.tif [
x1 x2 y1 y2 ]
DESCRIPTION¶
tiffsv saves all or part of the framebuffer in a file using the Tag Image
File Format, Revision 6.0. By default, the image is saved with data samples
packed (
PlanarConfiguration=1), compressed with the Lempel-Ziv &
Welch algorithm (
Compression=5), and with each strip no more than 8
kilobytes. These characteristics can be overridden, or explicitly specified
with the options described below.
OPTIONS¶
- -b
- Save the image as a greyscale image as if it were processed
by tiff2bw(1). This option is included for compatibility with the
standard scrsave(6D) program.
- -c
- Specify the compression to use for data written to the
output file: none for no compression, packbits for PackBits
compression, jpeg for baseline JPEG compression, zip for
Deflate compression, and lzw for Lempel-Ziv & Welch compression
(default).
- LZW compression can be specified together
with a predictor value. A predictor value of 2 causes each scanline
of the output image to undergo horizontal differencing before it is
encoded; a value of 1 forces each scanline to be encoded without
differencing. LZW-specific options are specified by appending a
``:''-separated list to the ``lzw'' option; e.g. -c lzw:2 for
LZW compression with horizontal differencing.
- -p
- Specify the planar configuration to use in writing image
data. By default, tiffsv will create a new file with the data
samples packed contiguously. Specifying -p contig will force data
to be written with multi-sample data packed together, while -p
separate will force samples to be written in separate planes.
- -r
- Specify the number of rows (scanlines) in each strip of
data written to the output file. By default, tiffsv attempts to set
the rows/strip that no more than 8 kilobytes of data appear in a
strip.
NOTE¶
Except for the use of
TIFF, this program is equivalent to the
standard
scrsave program. This means, for example, that you can use it
in conjunction with the standard
icut program simply by creating a link
called
scrsave, or by creating a shell script called
scrsave
that invokes
tiffgt with the appropriate options.
BUGS¶
If data are saved compressed and in separate planes, then the rows in each strip
is silently set to one to avoid limitations in the
libtiff(3TIFF)
library.
SEE ALSO¶
scrsave(6D)
pal2rgb(1),
tiffdump(1),
tiffgt(1),
tiffinfo(1),
tiffcp(1),
tiffmedian(1),
libtiff(3TIFF)
Libtiff library home page:
http://www.remotesensing.org/libtiff/