sane-hpsj5s - SANE backend for HP ScanJet 5S sheet-fed scanner
The sane-hpsj5s library implements a SANE (Scanner Access Now Easy) backend that provides access to a parallel port Hewlett-Packard ScanJet 5S scanner. IMPORTANT: this is alpha code. Don't expect this to work correctly. Many functions are missing, others contain errors. In some cases, your computer might even hang. It cannot be excluded (although I consider it extremely improbable) that your scanner will be damaged. LIMITATIONS: For now this backend works only on Linux. This limitation is due to dependence on the libieee1284 library. If your system supports libieee1284 too, this backend should work. If you ported libieee1284 for your platform, please let me know. Your system should support EPP (or EPP+ECP ) mode to operate this scanner. Future versions will support ECP and SPP (Nibble and Byte) modes also. It's planned to support scanners not only at daisy-chain position 0, but anywhere. Support for multiple scanners could be implemented too. Current version implements only gray scale scanning. True Color and B/W modes are not supported for now. That said, TESTERS ARE WELCOME. Send your bug reports and comments to Max Vorobiev <email@example.com>.
This backend expects device names of the form: special Where special is the parallel port name in form, libieee1284 expects. It seems to be system dependent. Under Linux it's parport0, parport1, etc.
The contents of the hpsj5s.conf file is a list of parport names that correspond to HP ScanJet 5S scanners. Empty lines and lines starting with a hash mark (#) are ignored. Only one device name can be listed in hpsj5s.conf for this moment. Future versions will support daisy chain selection.
It seems that HP ScanJet 5S scanner uses software noise correction. This feature is not implemented for now. So does gamma correction and calibration. I'll handle it in future versions. Native resolution for this scanner is 300 DPI. Other modes could be jagged in some ways.
/etc/sane.d/hpsj5s.conf The backend configuration file (see also description of SANE_CONFIG_DIR below). /usr/lib/arch_triplet/sane/libsane-hpsj5s.a The static library implementing this backend. /usr/lib/arch_triplet/sane/libsane-hpsj5s.so The shared library implementing this backend (present on systems that support dynamic loading).
SANE_CONFIG_DIR This environment variable specifies the list of directories that may contain the configuration file. Under UNIX, the directories are separated by a colon (`:'), under OS/2, they are separated by a semi-colon (`;'). If this variable is not set, the configuration file is searched in two default directories: first, the current working directory (".") and then in /etc/sane.d. If the value of the environment variable ends with the directory separator character, then the default directories are searched after the explicitly specified directories. For example, setting SANE_CONFIG_DIR to "/tmp/config:" would result in directories "tmp/config", ".", and "/etc/sane.d" being searched (in this order). SEE ALSO sane(7) http://hpsj5s.sourceforge.net http://cyberelk.net/tim/libieee1284
Max Vorobiev Man page mostly based on canon.man 13 Jul 2008 sane-hpsj5s(5)
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.
Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.
Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.