Correcting a 2400 dpi A3 Scanner in Software
The VIISAN VF3240 is a 2400 dpi A3 flatbed scanner, sold under several names for a few hundred euros. Above 600 dpi, every scan has three defects, coming from the LEDs, from the motor, and from the sensor. vf3240 is an open source driver that talks to the scanner directly over USB and removes them. This article is about the three defects and how they are corrected.















