write compressed image - write compressed image file to disk from a field

Name

     write compressed image - write compressed image file to disk from a field

Summary

     Name	   write	compressed image

Type

  data

Inputs

   field 2D 4-vector byte

Outputs

   none

Parameters

   _N_a_m_e		   _T_y_p_e		  _D_e_f_a_u_l_t	 _M_i_n	   _M_a_x
		   Output File	   Browser	  not applicable

Description

     The "write compressed image" module provides the same functionality
     as the AVS-supplied "write image" module, with the added twist that
     the written image will be in a "compressed" format.  That is, 
     a file is written using the AVS .x file format, then compressed
     with the compress utility present on your UNIX(tm) system.
     An AVS image may be decompressed using the UNIX(tm) uncompress utility,
     or by using the sibling module "read compressed image."
     Upon entrance to the computation function, this module first writes
     a "normal" (ie uncompressed) AVS .x file.  After that is finished,
     that file is compressed using the system-supplied "compress"

Utility

PARAMETERS
     Output Image
	  The name of the compressed image file.  A ".Z" suffix will
	  be added to whatever name the user gives, courtesy of the
	  system compress utility.
OUTPUTS
	none
RELATED	MODULES
     read compressed image, write image, write image

See also

     UNIX(tm) compress, uncompress
AVS Modules						write compressed image
Lawrence Berkeley Laboratory					   24 Jan 1992
24 Jan 1992
The source code, image_io.c, contains two very useful modules.
They will read and write compressed AVS image files, where the
UNIX-supplied un/compress are used for un/compressing the
.x files.
These modules have been tested on Sun and Stardent, uh, KPC Titan machines.
They HAVE NOT BEEN TESTED on anything alse.
wes