LibJPEG, programming, image (de)compression library using the JPEG standard From Wikipedia: libjpeg is a library of computer programs created by the Independent JPEG Group which contain functions to manipulate JPEG images. It is written entirely in the C programming language. The current version of the library is 6b, although it has not been updated since 1998. JPEG is a standardized compression method for full-color and gray-scale images. JPEG is intended for "real-world" scenes; cartoons and other non-realistic images are not its strong suit. JPEG is lossy, meaning that the output image is not identical to the input image. The user can trade off output image quality against compressed file size by adjusting a compression parameter. http://en.wikipedia.org/wiki/libjpeg -- LibJPEG V6.2b http://www.vsm.com.au/ftp/jfp/kits/ © Tous droits réservés 2003 Jean-François PIÉRONNE LibJPEG is a image de/compression library using the JPEG standard used by several software packages, including Python. By default, the installation procedure installs this library package in the SYS$COMMON:[LIBJPEG] directory. To install it in another directory, dev:[dir], use the /DESTINATION parameter of the PRODUCT command. In this case, the library package will be installed in the dev:[dir.LIBJPEG] directory. Installation 1. Make the directory which holds the ZIP file your default directory 2. Extract the PCSI kit from the ZIP archive. $ UNZIP "-V" LIBJPEG-V0602--1.ZIP 3. Install the library package to your chosen destination. $ PRODUCT INSTALL libjpeg (default) or ... $ PRODUCT INSTALL libjpeg /DESTINATION=dev:[dir] 4. Finally, run the DCL procedure STARTUP.COM to define the necessary logicals. (You might want to add the relevant line to your SYSTARTUP_VMS.COM file.) $ @SYS$COMMON:[LIBJPEG]STARTUP (default) or ... $ @dev:[dir.LIBJPEG]STARTUP