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tiffsv - save an image from the framebuffer
in a TIFF
file (Silicon Graphics version)
tiffsv [ options ] output.tif
[ x1 x2 y1 y2 ]
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 overriden, or explicitly
specified with the options described below.
- -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.
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.
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(3)
library.
scrsave(6D)
pal2rgb(1)
, tiffdump(1)
,
tiffgt(1)
, tiffinfo(1)
, tiffcp(1)
, tiffmedian(1)
, libtiff(3)
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