| Patch Detect indicates whether or not the scanner detected a toggle |
| patch on the document (side independent). If a toggle patch appears on |
| a document, all images created from this document will have this |
| indicator set in their image header. |
| Toggle Patch indicates the side of the document where the where |
| the toggle patch was detected. If a toggle patch appears on a |
| document, only the images created from the side of the document |
| containing the patch will have this indicator set in their image header. |
Zone processing | Some applications have a requirement to store part of an image in color |
| or grayscale and the rest of the image in black and white format (this |
| saves storage space by not storing the entire image in color or |
| grayscale). Zone processing is a fixed crop window (the zone) located |
| relative to the upper left corner of a document. It allows the operator to |
| select via the host application an area on the document to be delivered |
| in color, grayscale or black and white format (a separate window for |
| both black and white and color/grayscale may be defined). Different |
| zones may be selected for both the front and rear of the image. |
| This feature may be used in conjunction with auto cropping. Following |
| is an example of producing a color zone. |
Original
Black and white image | Relative Cropping |
1.Prepare documents.
2.Start the scanner to do dual stream simplex scanning (front black and white and front color).
3.Setup the scanner to retrieve black and white images first.
4.Setup front black and white to be auto cropping.
5.Setup front color to be relative cropping.
6.Enable the scanner and start polling.
Loop
Read front black and white image header
Read front black and white image (will return full image)
Read front color image header
Read front color image (will return only the color zone)
End loop
