Kodak i780 Product Information page 19

Relative to Document or zone processing (used for batches of same-size documents) — some
applications have a requirement to store part of an image in color and the rest of the image in
black and white format (this saves storage space by not storing the entire image in color). Zone
processing is a fixed crop window (the zone) that allows the operator to select via the host
application an area on the document to be delivered in either color or black and white format (a
separate window for both black and white and color may be defined). Different parameters may
be selected for both the front and rear of the image.
Zone processing can also be applied to text or black and white areas on a document. For
example, a certain area might contain a bar code that needs to be read as a high-resolution black
and white image. The i780 Scanner can pick up the area with the bar code as a black and white
image and deliver the rest of the image in full color (high or low resolution depending upon the
needs of the application). This reduces storage space requirements, network traffic and still
delivers the functionality required for an effective image processing system.
Original Black and White Cropping Relative Cropping
Deskew — Multi-bit (Color/Grayscale/Black and White)
The skew detection and correction subsystem performs accurate deskew on the 8-bit image in
each channel (RGB and grayscale) in the i780 Scanner. The front, rear, and simultaneous outputs
are deskewed independently providing maximum accurate deskew, all done at full machine
speed. It is important to note that deskew is based on the document edges not the content within
the document. This provides an assurance that document information will not be lost.
The new algorithm is also less sensitive to background noise and provides for deskew at an angle
up to 45 degrees with an accuracy of ± 0.3 degrees. (Since it takes longer to deskew a document
with a higher degree of skew, the feeder is designed to throttle while the image is deskewed.)
Electronic Color Dropout
Electronic color dropout is used to eliminate a form's color background so that a document
management system may automatically (through OCR or ICR technology) read pertinent data
without interference from the lines and boxes of the form. The i780 Scanner can drop out either
red, green or blue. The dropout color selection (R, G, B) is changeable at the host. The scanner
does more than just drop out the color. The selected dropout color is fine-tuned for optimal image
quality through a simple operator setup procedure.
The i780 Scanner uses electronic color dropout, meaning there is no lamp change or filter change
required to change the dropout color.
The i780 Scanner can be configured to output black and white images with the selected color
dropped out, but also output the full-color image.
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