Xerox 8825 用户手册

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页码 162
32  
•Document quality 
 XEROX WIDE FORMAT COPY SYSTEM  
REMOVAL will automatically make the appropriate compensation to 
optimize the reproduction of the dark details.  If the input document has a 
faded background, the feature will enable a faithful reproduction of the 
original. However, the faded background must be inserted with the fading 
running in the process direction with the darker side being inserted first. 
In some cases, you may wish to optimize the settings for individual 
documents.  For example, you may not wish to faithfully reproduce 
paste-up lines, or other artifacts on the original.  For this reason, 
additional controls are available for selection of document type, 
document image quality, desired output darkness, and background 
suppression. 
The DYNAMIC BACKGROUND REMOVAL feature, when enabled, uses 
information about the document captured during the scanning process to 
set image quality settings.  The system automatically adjusts for the 
darkness of the background and the image content through out the 
length of the document. When not enabled, it only uses the information in 
a 0.70 (17.8 mm) area over the width of the document to establish the 
image quality settings. Therefore, best results can be obtained if the 
document is fed in with an edge that has a representative sampling of 
both the background and the foreground image. 
The Dynamic Background Removal feature provides an accurate copy 
for most documents including blueline, blueprints, color line art/text, and 
mixed documents containing combinations of halftone and art, or 
photograph and art.  For documents with inverted images, the INVERT 
function should be enabled.  Refer to "Inverting an image" in the "Special 
features keys" section for instructions on the INVERT function. 
The AUTOWIDTH /AUTOCENTER features enable the system to 
automatically detect the width and center of the document.  In cases 
such as transparencies or translucent documents where automatic 
detection is not possible, a message will prompt you to enter the width 
manually.  You then must center the document before inserting it into the 
Scanner. 
You can enable/disable the AUTOWIDTH/CENTER feature at any time.  
Refer to "Scanner Control" in the "Main Menu" section of this manual for 
more information. 
PRODUCTIVITY MODE: This feature is made available with version 10.0 
AccXES software, and requires a new WIDE FORMAT SCAN SYSTEM 
with the Productivity Document Feed Tray with the discrete width 
sensors. This feature measures the document width without doing a pre-
scan, requiring the operator to manually align the document within the 
media size guidelines on the Feed-in Tray. The width sensors eliminate 
the need for a prescan thereby increasing the overall throughput of the 
system resulting in higher productivity 
When the PRODUCTIVITY MODE is used the operator must select the 
media series, ANSI, ARCH, ISO A, CUSTOM, etc since the number of 
sensors that can be provided can not monitor every media series. The 
PRODUCTIVITY mode can be enabled/disabled at anytime. Refer to 
"Scanner Control" in the "Main Menu" section of this manual for more 
information. 
Automatic edge 
detection and 
document centering