MAN page from Mandrake Other xv-3.10a-12.i386.rpm

vdcomp

Section: User Commands (1)
Index

Name

vdcomp - decompress a compressed PDS image

Synopsis

vdcomp [ infile ] [ outfile ] [ format-code ]

Description

The vdcomp program reads a variable length compressed PDS imageand outputs a fixed length uncompressed image file in PDS format withlabels, image histogram, engineering table, line header table and animage with PDS, FITS, VICAR or no labels.

If used on a non-byte-swapped machine the image histogram isun-swapped.

Options

Vdcomp will prompt for any options that are not supplied on thecommand-line.

infile

: The name of compressed image file.

outfile

: The name of uncompressed image file.

format-code

Select from the following list:

: 1 - SFDU/PDS format [default]
2 - FITS format
3 - VICAR format
4 - unlabelled binary array

Limitations

This program has been tested on a VAX 780 (VMS 4.6), SUN Workstation(UNIX 4.2, release 3.4), an IBM PC (MICROSOFT 5.1 compiler) andMacintosh IIx using Lightspeed C version 3.0. When converting toother systems, check for portability conflicts.

Credits

This program uses Kris Becker's subroutine DECOMP.C (which is includedin this program in a shortened version).

History

bradleyAATTcis.upenn.edu 06-23-94 ansi-fied program

datriAATTconvex.com, 11-15-91 added recognition of - as stdout for outputfilename; disabled various messages; directed messages to stderr;added exit status

DEC89 Modified program to handle both Voyager and Viking images.

OCT89 Converted Voyager decompression program to handle Vikingcompressed images. Changed obuf to 'unsigned' to simplify computationof checksum.

AUG89 Added code to get command line arguments for filenames andoutput format; routines to free memory used by the Huffman tree);fixed the SFDU label output length; and modified the I/O routines sothat the open for Host type 2 uses binary I/O.

JUN89 Fixed READVAR, to get length on 16-bit unswapped hosts.

JUL88 C driver to decompress standard Voyager Compressed images byMike Martin 1989/12/02.

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