Scanner Functions; Image Processing For Scanner Mode; Image Data Path - Ricoh B121 Service Manual

Hide thumbs Also See for B121:

Table of Contents

4.3 SCANNER FUNCTIONS

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 can be selected with SP mode (MR/MH/MMR for

binary picture processing).

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.

1. Image Store/Image Delivery Mode

The user can select the following modes from the LCD.

1) Delivery only

After image processing and image compression, all image data for the job are

stored in the printer controller RAM using TIFF file or PDF file format (binary

picture processing). The type of TIFF or PDF 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

After image processing and image compression, the data (TIFF or PDF) is sent

to the scanner Twain driver directory on the computer.

B622D903.WMF

B622D902.WMF

Table of Contents

B259 B260 B261 B122 B123