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Operating Modes
3-1
3. Operating Modes
The PANORAMA Monochrome Scanners incorporate three main
groups of operating modes:
•
Graytone mode (256 graytones).
•
B/W Copy modes with Dual 2D-Adaptive processing.
•
B/W modes (bitmapped, and Dual 2D-Adaptive).
3.1 Graytone Mode
In Graytone mode, the actual graylevel of each pixel is scanned; 256
levels are recognized, corresponding to 1 byte (8 bits) per pixel. This
results in graytone files that are 8 times larger than uncompressed
files scanned in Line mode at the same resolution. Graytones are
captured at 12 bits for maximum precision passing the best 8 bits of
graytone data to the computer
3.2 B/W Copy Modes
The copy modes incorporate Dual 2D-Adaptive processing with
different combinations of ADL+ Error Diffusion Halftoning, 2D-
Background suppression, 2D-Auto edge enhancement and 2D-
Adaptive thresholding. The copy modes are ideal scanning wide
format documents that are intended for re-printing. The ADL+ Error
Diffusion Halftoning supports visibility of graytones in printed output by
adding toned shades of gray in regions between black and white. The
copy modes are described in the table below:
Copy Mode
Image Processing
Usage
B/W Copy
Normal
ADL+ Error diffusion halftoning
2D-Auto edge enhancement
2D-Adaptive background
suppression
Halftone copy to print of all
normal originals
B/W Copy
Adaptive
ADL+ Error diffusion halftoning
2D-Adaptive thresholding
2D-Adaptive background
suppression
Halftone copy to print of Sepia,
Blueprint and other originals
with heavily distorted
foregrounds and backgrounds
where the shades making up
the image “noise” are close to
the shades making up the
image’s data and hard to
differentiate.
B/W Copy
Photo
ADL+ Error diffusion halftoning
Halftone copy to print of
continuos shades of gray such
as in photos.