Scanner Functions; Image Processing For Scanner Mode; Image Data Path - Ricoh B051 Service Manual

SCANNER FUNCTIONS

4.7 SCANNER FUNCTIONS

4.7.1 IMAGE PROCESSING FOR SCANNER MODE

The image processing for scanner mode is done in the IPU chip on the BICU
board. The IPU chip chooses the most suitable image processing methods
(gamma tables, dither patterns, etc) depending on the settings made in the driver.
The image compression method for binary picture processing can be selected with
scanner SP1-004 (either MR, MH, or MMR). For grayscale processing, JPEG is
used.
Whether the user selects the image mode using the driver (TWAIN mode) or from
the operation panel (Delivery mode), the IPU chip does the image processing using
the appropriate image processing methods mentioned above.

Image Data Path

1. Image Store/Image Delivery Mode
Image
Scanning Processing
SBU
The user can select the following modes from the LCD.
1) Delivery only
2) Store only
3) Store and delivery
After image processing and image compression, all image data for the job are
stored in the printer controller HDD using TIFF file format (binary picture
processing) or JPEG file format (grayscale processing). The type of TIFF
format used depends on the user's scanner settings.
When delivery mode is selected, the controller creates a file which contains the
destination and page information, then the controller sends the file to a server.
2. Twain Mode
Image
Scanning
SBU
After image processing and image compression, the data (RAW or JPEG) is
sent to the scanner Twain driver directory on the computer.
B463/B529
CÓPIA NÃO CONTROLADA
Image Image
Compression
BICU
Image
Processing Compression
BICU
CÓPIA NÃO CONTROLADA
NIB
HDD
Controller
Image
NIB
Controller
56
Rev. 05/2003
File
Server
B529D905.WMF
Image
PC
B529D906.WMF
SM