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A-61510 January 2005 2-9
Single-stream duplex
alternating between bi-tonal
and color/grayscale using
the scanner Toggle patch
This job stream is available for i820 and I840 Series Scanners.
The Toggle patch is a type 4 patch that is used to trigger the scanner
to switch from the current image stream (bi-tonal) to the alternative
image stream (color/grayscale).
The example illustrates using patch type 4 in the same way
which the “color patch” is utilized on the Kodak Digital Science
Scanner 3590C where it starts using bi-tonal.
1. Prepare documents with a patch Type 4 before and after any
color/grayscale documents.
2. Configure image processing parameters for all four images.
Before initiating the scanner, select only the front and rear
bi-tonal images to be retrieved.
3. Select both sides from the Toggle Patch drop-down box.
4. Start scanning.
Images will begin in bi-tonal and will change to color/grayscale
when the first toggle patch is detected. Images will remain
color/grayscale until the next toggle patch is detected. Images of
the toggle patch sheet will not be returned to the host unless you
also enable patch reading and select the Type 4 patch.