Fci (Fine Character And Image) - Gestetner A193 Service Manual

IMAGE PROCESSING

2.6 FCI (FINE CHARACTER AND IMAGE)

The FCI performs image smoothing and line width correction. These
functions only affect binary picture processed images in Letter mode. The fax
board and the printer controller each have independent smoothing circuits.
A193D511.wmf
Usually, binary picture processing generates jagged edges on characters as
shown in the above left illustration. The FCI reduces jagged edges of
characters using the image smoothing process.
Whether or not the object pixel undergoes smoothing depends on the
surrounding image data. The smoothing process for the object pixel is
performed by changing the laser pulse positioning and the laser power.
FCI smoothing can be switched on or off using the service program mode,
SP 2-902.
SM 2-17 (A193)