Xerox 8830 用户手册
44
•Image Quality
XEROX WIDE FORMAT COPY SYSTEM
•
INDEX - Saves the document as 8-bit indexed RGB (using
thresholding) compressed with PACKBITS.
thresholding) compressed with PACKBITS.
•
INDEX ED - Saves the document as 8-bit indexed RGB
(using error diffusion) compression with PACKBITS
(using error diffusion) compression with PACKBITS
SCAN OPTIONS (COLOR)
ü
COMPRESSION:
FORMAT:
: PACKBITS
: TIFF
PREVIEW
SCAN OPTIONS (COLOR)
ü
COMPRESSION:
FORMAT:
INDEX
: TIFF
PALETTE: DEFAULT
PREVIEW
•
PALETTE - Is shown only when the selected FORMAT is TIFF
and the COMPRESSION is INDEX or INDEXED. Use this
selection to determine which palette to use during RGB-to-index
color conversion. Select one of the following:
and the COMPRESSION is INDEX or INDEXED. Use this
selection to determine which palette to use during RGB-to-index
color conversion. Select one of the following:
•
DEFAULT - Is the standard Windows system palette.
•
CAD_GIS - Is an AutoCAD-based palette suitable for
scanning CAD documents and GIS maps.
scanning CAD documents and GIS maps.
•
WEB - Is a Windows WEB palette of 216 colors suitable for
publishing documents on the WEB.
publishing documents on the WEB.
•
PERCEPTUAL - Perceptual palette or Visual palette gives
more weight to visually sensitive colors.
more weight to visually sensitive colors.
SCAN OPTIONS (COLOR)
ü
COMPRESSION:
FORMAT:
NORMAL
JPEG
PREVIEW
•
COMPRESSION (JPEG selected) - Use this selection to
determine the compression method to apply to the saved JPEG
document. Select one of the following:
determine the compression method to apply to the saved JPEG
document. Select one of the following:
•
BEST IQ - Saves a document at a lower compression ratio
but has higher image quality.
but has higher image quality.