KScan Help

Contents

• Introduction
• Features
• Troubleshooting
• Precautions
• Changes
• Author

KScan is a scanning program for the K Desktop Environment. It is based upon SANE scanner drivers. The program is distributed under the terms of the GNU General Public License. Last modified : 2 Feb 1998.

The current version is 0.1.1. In the next versions some other features will be added, e.g. auto brightness/contrast.

The current features are:

• Scanning region selection
• Image enhancement tuning without rescaning
• Zooming
• Gamma correction
• Saving scanned images in BMP format

Possible problems with KScan:

1. Preview image and scanned image are too different
   Try turning on "Force brightness emulation" and "Force contrast emultaion" options.
2. After choosing Options/Backend, some messages about AGFA SnapScan appear and than KScan hangs
   A common problem with SANE 0.70. Either look through SANE mailing list archives and get patches, or "downgrade" to previous version of SANE. Or, if there is a SANE >0.70, upgrade to it. At my system, just editing SANE configuration files didn't help.
3. KScan can't even scan a preview image
   Try choosing your driver in Options/Backend. If this doesn't help, try xscanimage (from SANE distribution). If it also doesn't work, this is a SANE configuration problem. Otherwise your driver is not compatible with KScan (most likely). If you have a flatbed scanner and it doesn't work with KScan, please let me know, so I can fix KScan.
4. KScan scans with wrong resolution
   Try setting "Maximal DPI" option. If it doesn't help, please contact me

Don't make KScan suid root on a multiuser machine! Otherwise an evil user can scan some pornography into your /etc/passwd. Even if you modify KScan in order to make it handle permissions, bad guys may find buffer overruns in it, write shellcode, and compromise your system.

Version 0.1.1 - 2 Feb 98

• fixed a bug in preview.cpp that resulted in incorrect brightness/contrast settings
• lets user to play with kscan even without a scanner
• remembers the preview image
• backend features analysis
• an attempt was made to fix autoconf/automake stuff

KScan is written by Ivan Shvedunov.

Autoconf magic, this help skeleton etc. are borrowed from khexdit 0.4 (written by Stephan Kulow), included in kdesdk package.