Avision av121b Manual De Usuario

 
 

 

 

Threshold 

Used to convert a grayscale image to a  

bi-tonal image. The value ranges from 0 to 

255. A low threshold value produces a 

lighter image, and can be used to subdue 

backgrounds and subtle, unneeded 

information. A high threshold value produces 

a darker image, and can be used to help pick 

up faint images.  

Adjust the threshold setting by dragging the 

Threshold sliding bar to the left or right to 

achieve the desired threshold setting. 

 

 

 

 

 

 

4-8