Scanning Section Control Pc Board (Slg); Features; Functions Of Image Processing - Toshiba e-STUDIO520 Service Manual

7.3

Scanning Section Control PC Board (SLG)

7.3.1

Features

1) The image processing section on the SLG board (SLG) is controlled by the CPU on the SLG board
(SLG).
2) The image processing section on the SLG board (SLG) realizes the following when functioning the
equipment:
- High quality image processing
- Image memory editing
- Editing processing
- Gamma correction
- Gradation processing
- External output system interface
7.3.2

Functions of image processing

1) High quality image processing
- Background processing function (Range correction)
This function removes undesirable background so that the original can be reproduced appropri-
ately. By using the background adjustment function while manually adjusting the image density,
undesirable background of the original can be removed if any, and some necessary but disap-
peared background can be recovered. By using this function, it is possible to cut the background
density down to zero when copying originals which have a certain level of background density,
such as newspapers.
<Example>
Back-
ground
Lower
e-STUDIO520/600/720/850 IMAGE PROCESSING
Dynamic range
After range
width
adjustment
Text
Density Higher
Histogram
Extended dynamic range
Lower
Fig.7-4
7 - 4
width
Density Higher
March 2005 © TOSHIBA TEC