Avision av121b Manual De Usuario

 
 

Binarization  This is the process of converting a 

grayscale or color image to a bi-tonal 
image. There are several different 
methods of performing this conversion.  
Two of the options are Dynamic 
Threshold and Fixed Processing. 

Dynamic Threshold:  Selecting 

Dynamic Threshold allows the scanner 

to dynamically evaluate each document 

to determine the optimal threshold value 

to produce the highest quality image.  

This is used to scan mixed document 

containing faint text, shaded background, 

or color background with a single setting.  

If Dynamic Threshold is selected, 

Threshold, Brightness, and Contrast are 

not available. 

 

Fixed Processing:  Used for black-and-

white and other high contrast documents.  

A single level is set to determine the 

black-and-white transition. The threshold 

is programmable over the entire density 

range.  Fixed Processing sets Contrast 

to 0.  If Fixed Processing is selected, 

Contrast is not available.

 

 

 

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