December 2000 © TOSHIBA TEC
6 - 5
1600/2000/2500 IMAGE PROCESSING
(b) High-pass filter circuit
When an original with sharp image edges (text originals, etc.) is optically scanned and its image
signals are output through the CCD, the edges tend to become dull due to the characteristics of the
lens used and other reasons.
To compensate for this phenomenon, edge enhancement operation is performed on the differ-
ences in density between the target pixel and its adjacent ones to obtain an image with high
reproducibility of the original.
(3) Image memory editing
Editing functions such as enlargement/reduction and mirror image are performed using line memory.
The line memory is used for storing one line of pixel data in the primary scanning direction, and
updated with new pixel data each time the next line is scanned.
(a) Enlargement/reduction
This function is accomplished by using line memory control in a part of operations.
<Example> Enlargement
Solid black area
Original
Image signal
After correction
Low contrast area
<Example> Reduction
1
100%
200%
2
3
4
5
6
7
8
9
10
1
1
2
2
3
3
4
4
5
5
1
100%
50%
2
3
4
5
6
7
8
9
10
1
3
5
7
9
07006
07007
07008
Содержание DP1600
Страница 1: ...DIGITALPLAINPAPERCOPIER DP1600 2000 2500 File No 31100011 R0111216600 TTEC ...
Страница 2: ...Copyright 2000 TOSHIBA TEC CORPORATION ...
Страница 21: ...1600 2000 2500 OUTLINE OF THE MACHINE 2 8 December 2000 TOSHIBA TEC B 2 Switches SW2 SW1 02 02 04 ...
Страница 23: ...1600 2000 2500 OUTLINE OF THE MACHINE 2 10 December 2000 TOSHIBA TEC C 1 Motors M1 M3 M5 M7 M6 M4 M2 02 02 06 ...
Страница 145: ...8 PRINTING 8 1 8 1 General Description 8 1 8 2 Structure 8 2 8 3 Laser Diode 8 6 8 4 Disassembly and Replacement 8 7 ...
Страница 231: ...December 2000 TOSHIBA TEC 16 1 1600 2000 2500 PC BOARD 16 BOARD ASSEMBLY 16 1 PWA F MAN 16 01 01 ...
Страница 232: ...1600 2000 2500 PCB BOARD 16 2 December 2000 TOSHIBA TEC 16 2 PWA F RLY 16 02 01 ...
Страница 233: ...December 2000 TOSHIBA TEC 16 3 1600 2000 2500 PC BOARD 16 3 PWA F PIF 16 03 01 ...
Страница 234: ...1600 2000 2500 PCB BOARD 16 4 December 2000 TOSHIBA TEC 16 4 PWA F PNL 16 5 PWA F VR 16 04 01 16 05 01 ...
Страница 236: ...1600 2000 2500 PCB BOARD 16 6 December 2000 TOSHIBA TEC 16 7 PWA F FUS ASD AUD CND TWD SAD models 16 07 01 ...
Страница 237: ...17 WIRE HARNESS CONNECTION DIAGRAMS 17 1 ...
Страница 264: ...1 1 KANDA NISHIKI CHO CHIYODA KU TOKYO 101 8842 JAPAN ...