Epson Grayscale Scanner Manual de usuario descargar pdf (Pagina 10)

(As described under Color/Grayscale settings.)

CCITT Group 4

Applies CCITT Group 4 compression to black-and-white input page images. This fast, lossless

compression method is compatible with Acrobat 3.0 (PDF 1.2) and later.

Deskew

Rotates any page that is not square with the sides of the scanner bed, to make the PDF page

align vertically. Choose Automatic or Off.

Background Removal

Whitens nearly white areas of grayscale and color input (not black-and-white input).

For best results, calibrate your scanner’s contrast and brightness settings so that a scan of a

normal black-and-white page has dark gray or black text and a white background. Then, Off or

Low should produce good results. If scanning off-white paper or newsprint, use Medium or High

to clean up the page.

Edge Shadow Removal

Removes dark streaks that occur at the edges of scanned pages, where the paper edge shadows

the scanner light. Choose Off, Cautious, or Aggressive.

Despeckle

Removes isolated black marks in black-and-white page content. Low uses a basic peephole filter.

Medium and High use both a peephole filter and a large area filter that removes larger spots

farther from nearby features.

Descreen

Removes halftone dot structure, which can reduce JPEG compression, cause moire patterns, and

make text difficult to recognize. Suitable for 200–400-dpi grayscale or RGB input or, for Adaptive

compression, 400–600-dpi black-and-white input. The Automatic setting (recommended) applies

the filter for 300 dpi or higher grayscale and RGB input. Select Off when scanning a page with no

pictures or filled areas, or when scanning at a resolution higher than the effective range.

Halo Removal

When On (recommended), removes excess color at high-contrast edges, which may have been

introduced during either printing or scanning. This filter is used only on color input pages.

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Epson Grayscale Scanner Manual de usuario Pagina 10