Halftone Removal used to enhance images containing dot matrix text and/or images with shaded or colored backgrounds using halftone screens. This filter effectively eliminates noise caused by the halftone screen. This option is only applied to binary images.
Polarity the host PC provides information to the scanner defining whether the image should be stored in standard or reverse polarity. The default polarity is Black on a White background. Reverse polarity is White on a Black background.
Black on White polarity | White on Black polarity |
Noise filter — Occasionally small dots or specks appear in the background of a scanned image. These specks increase file compression size and usually contain no image information. Using the Noise Filter on documents containing very fine detail (e.g., the dot on an "i" in
Noise Filter can be used with binary images only and is Front/Rear independent. Choose None, Lone Pixel or Majority Rule.
•Lone Pixel reduces random noise on binary images by converting a single black pixel surrounded by white to white or by converting a single white pixel surrounded by black to black.
•Majority Rule sets the central pixel value in a matrix according to the majority of white or black pixels in a matrix.
No Noise Filter Used | Lone Pixel |
| 61 |