Image enhancement filters Image Enhancement filters are used to optimize certain maximum characteristics.
The following Image Enhancement filter options are available for the scanner/microimager 990 only.
∙No (all-pass) filter — used when no enhancement to an image is necessary.
∙Fine Line (high-pass) filter — used to accentuate the fine details of an image. This filter is typically used to enhance the detail of an image which contains small print (i.e., point type). This filter may inadvertently accentuate background noise.
∙Text (band-pass) filter — used to enhance text in an image. This filter is typically used when scanning documents containing fine lines or small print (4-point type). This filter effectively reduces background noise.
∙Halftone Removal (low-pass) filter — used to enhance images containing dot matrix text and/or images printed with shaded or colored backgrounds using halftone screens. This filter effectively reduces background noise.
The following Image Enhancement filter options are available for the Document Scanners (5500, 7500, 9500) series.
∙No (all-pass) filter — used when no enhancement to an image is necessary.
∙Halftone Removal (low-pass) filter — used to enhance images containing dot matrix text and/or images printed with shaded or colored backgrounds using halftone screens. This filter effectively eliminates noise caused by the halftone screen.
Refer to Chapter 6, Scanner-unique Commands for a description of the MX/Y/Z command.
A-61122/A-61124 March 1999 | E-5 |
