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hp designjet scanner 4200 |
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tell me about scanner operating modes
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The scanner can work in the following operating modes:
...RGB mode
...graytone mode
...B/W modes
...2D-sharpening, 2D-softening, and
2D-blur
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Full 24-bit true color mode for 16.8 million colors. Use the true
color mode for precise reproduction of all color shades. This mode creates large files,
especially when scanning large formats.
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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; for example, an E-Size drawing scanned in graytone mode at 300 dpi has a
file size of 150 MByte, compared with typical 0.4 -1.0 MByte for a compressed file in Line
mode.
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In these modes, the scanner outputs each scanned pixel as a single
bit, either black (1) or white (0), depending on whether its gray level is below or above the
threshold.
Both fixed level and 2D-Adaptive thresholding are supported.
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:
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Copy Mode
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Image Processing
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Usage
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B/W Copy Normal
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ADL+ Error diffusion halftoning
2D-Auto edge enhancement
2D-Adaptive background suppression
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Halftone copy to print of all normal originals
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B/W Copy Adaptive
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ADL+ Error diffusion halftoning
2D-Adaptive thresholding
2D-Adaptive background suppression
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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.
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B/W Copy Photo
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ADL+ Error diffusion halftoning
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Halftone copy to print of continuos shades of gray such as in
photos.
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2D-sharpening, 2D-softening, and 2D-blur |
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Through your software, you can manually set and control
sharpening, softening and blurring filters, giving you rich possibilities for combining
effects to obtain perfect enhancement results.
For example, you may have an image with details (such as text or
lines) you wish to sharpen. But if the image also contains large concentrated areas of colors
or graytones, sharpening will make unwanted noise to appear in the scanned image. By using
the sharpen filter together with the blur filter, you can get the sharp edges you need
without creating the side effect of unwanted noise. Both filters can be set at different
levels for ultimate control of effects.
The B/W Copy Normal scanning mode incorporates 2D-Auto edge
enhancement, with automatic, on-the-fly sharpening of your image.
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