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Image Functions
Zooming
3.3.4
[A.3.3.3 IMAGE CONTROL command / Image control registerA#5,A#6/B#5,B#6]
Zooming is the function to enlarge or reduce the image from 400 dpi. X and Y independent variable
resolutions are supported. This zooming is processed in grayscale, so smooth and non-distorted
images can be obtained even when halftone is applied.
NOTICE: Resolution is converted by an electrical method. Therefore , no matter how high
NOTICE: Zooming rate of back side reading must be same as front side.
NOTICE: The output resolution is limited depending upon memory installed as described in
3.3.5
Dither download
[A.4.10 SEND command / SEND data]
User's own dither pattern is downloaded with this function. Four built-in dither patterns are available
basically and 8 more dither patterns can be downloaded.
3.3.6
Gamma download
[A.4.10 SEND command / SEND data]
Gamma downloading is supported to scan with user's own gamma correction pattern. Tow built-in
gamma patterns, Ordinary and High contrast, are basically available. And four more gamma patterns
can be downloaded.
NOTICE: When the downloaded gamma pattern is specified for grayscale reading, the last two bit
3-30
resolution is specified, small texts or narrow lines will not be resolved more clearly than
400 dpi image does.
Table 2.4.
Zooming (800 dpi at 200%)
of the pixel output data is always B'00'.
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