Xerox Documate 3640 User Guide

Xerox® DocuMate® 3640
User’s Guide 171
Image Enhancements
Click on the Image Enhancements icon to select options applicable to what type of image processing 
you want applied for the items being scanned.
•
Main panel —this panel contains the most commonly used scan settings. Some of the options in 
this panel may have adjustment options on th e other panels in this section. When the Basic 
source configuration mode is selected, this is the only panel available. Change to the  Advanced 
source...

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Disabled Options in this Section
Some options in the interface may be grayed out an
d cannot be selected. Grayed out options are either 
not appropriate for the current scanner, the software  needed to enable the feature is not installed, 
or 
the feature is dependent on another setting in the  scanner's interface. Hover the mouse cursor over a 
grayed out feature to see information  about why the feature is unavailable.
When you are using a scanner that has...

Xerox® DocuMate® 3640
User’s Guide 173
Main Panel Options
Some of the options in this panel 
may have advanced adjustment opti ons on a different panel in this 
section. When the  Advanced configuration mode is selected, an icon will appear  next to those features 
which have adjustment options on  another tab. Click on one of the icons to go to the area of the 
interface where the adjustment options are located.
Click on a link below to go to the appropriate page in this section for instructions on...

Xerox® DocuMate® 3640
User’s Guide
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Brightness
 works in conjunction with  Contrast for image enhancement. When you are adjusting the 
brightness level to improve the scanned image quality, try adjusting the contrast level as well. The 
contrast level is the range between the lightest and  darkest parts of the image. For example, if you 
scanned a document with notes written in pencil, you may have to decrease the brightness level to get 
the handwritten notes to appear in the scanned image. However,...

Xerox® DocuMate® 3640
User’s Guide 175
Choosing contrast values
While 
Brightness  adds the same amount of gray or  white to all pixels in the image, Contrast  adjusts 
the pixels based on the pixel color level. For instance, increasing the contrast level will add white to light 
colored pixels and gray to dark pixels to make the  difference between color levels in the image crisper. 
Decreasing the contrast level will have the opposite  affect, where light colored pixels are modified with 
gray and dark...

Xerox® DocuMate® 3640
User’s Guide
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Black background scanners:
Some scanners have a black background plate. A bl
ack background results in more precise cropping 
results and skew detection. However, when scanning  thin paper, such as carbon copy paper or ruled 
writing paper, which are less than 18lb paper we ight, the background may “bleed” through into the 
final image and make the image darker than it shou ld be. In that case, try adjusting the brightness 
level between 40% and 60%, then adjust the...

Xerox® DocuMate® 3640
User’s Guide 177
Technical note:
Most monitors have a gamma setting that is user adjustable. When viewing scanned images on-screen, 
versus printing the image, the gamma setting of th
e monitor may affect how light or dark the scanned 
image looks when compared to the original. If the  scanned image is too different from the original 
image, or if adjusting the scanned gamma level does not modify the image how you want, try 
adjusting the monitor's gamma level. Refer to the...

Xerox® DocuMate® 3640
User’s Guide
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Mirror Image
The 
Mirror image  option flips the image left-to-right.
Bit Depth Reduction
The Bit depth reduction  options are only available when scanning in black and white. Click the drop 
down menu and select an option from the list.
Threshold and Dynamic threshold
Threshold  enables you to set what level of light or dark to look for on a page. When scanning in black 
and white, everything on the page is set to either white pixels or black pixels in the final...

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Error diffusion, Bayer, and Halftone pattern
Error diffusion
, Bayer , and Halftone patterns  are the intentional applicat ion of noise (dithering) in 
the image to help alleviate banding when scanning in  binary (black and white) mode. For example, if 
you scan a color photo in black and white, the image file will have large blocks of black and white and 
the image barely recognizable. Dithering the image creates a black and white image that is 
recognizable....

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• The position of the hole cannot be flush to th
e edge of the margin area and it cannot overlap the 
edge of the margin area
Color Processing Panel Options
The options in this panel are for setting how the scanner should process colors in specific color modes.
Color Dropout
Color dropout  tells the scanner and software to remove a specific color from the image. You can 
choose either  Red, Green , or Blue , or define a custom color, to be dropped out of an image....