Operation Manual
Section 7: Optimizing the Scanned Documents
39
General
Smoothen (color or grayscale) image
This option is selected by default. It smoothens out differences in intensity, creating a greater contrast
between the text and the background. Sometimes smoothening is the only way to separate text from a
colored background.
Remove dither (black-and-white image)
This option removes unwanted dither (noise) from black-and-white images.
Brightness
Move the slider to increase or decrease the brightness of your documents.
The results on the binarized image are shown immediately. If the results are not satisfactory, use the Undo
button to restore the settings.
Example 1: image is too dark
The image below is too dark and results in a plain black image. There is no text to be recognized.
In this case you need to brighten the image in order for the text to be displayed.
Example 2: image is too bright
The image below is too light and results in broken text characters. The text is hardy legible.
In this case you need to darken the image to obtain satisfactory results.
Contrast
Move the slider to increase or decrease the contrast between the text and the background.
The results on the binarized image are shown immediately. If the results are not satisfactory, use the Undo
button to restore the settings.
Example
The image below results in broken text characters.
In this case you need to increase the contrast to obtain satisfactory results.