I.R.I.S. IRIScan Pro 3 Wi-Fi User Guide - Manual (Page 50)

User Guide
6-5
6.2.2 Other Image Options
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.
Options: Fixed Processing.
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.
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.
200 dpi, Threshold:50,
Brightness: 0
200 dpi, Threshold:100,
Brightness: 0
Gray
Document Type: Normal
Three options of document type are provided when you choose Gray as the image type for
your scanned document. Choice: Normal.
 Normal: When using Normal, Threshold, Brightness, and Contrast can be adjusted.