Mark Detection Zone Setup dialog box

Use this dialog box to name your mark detection zone, describe how the mark is detected and optionally group multiple zones to produce a single result.

Zone name — enter the name for your new mark detection zone. This name identifies the mark area and appears in the Index setup as MD_(zonename) in the list of default values.

Filled value — the zone will return this value when it is detected to be “filled”. The value may be a single value such as “1” or a multi-character value such as “This checkbox was marked”. The value may also be left empty.

If the zone is added to a group of mark detection zones, this value is included in the value returned by the zone group.

Unfilled value — the zone will return this value when it is detected to be “unfilled” or empty. The value may be a single value such as “0” or a multi-character value such as “This checkbox was not marked”. The value may also be left empty.

If the zone is added to a group of mark detection zones, this value is not used. The unfilled value returned by a group of zones is defined in the group setup.

Side: Front or Back — select whether the mark area is located on the front or back of an image.

Frame: Frame or No Frame — a frame can be a rectangle, a circle, an ellipse, etc.; in which the mark is expected to be placed. The dimensions of the frame should be at least 50 pixels in each direction, 4 mm (0.2 inch) in the case of 300 dpi resolution.

If Frame is selected, it may be filled in by any shape such as an X, a tick, non-solid hatching, horizontal or vertical lines, etc. The recommended filling shape is an X or a tick. A small number of contiguous black pixels within the frame area will lead to a value of “filled” for the mark detection zone.
If NoFrame is selected, then any mark of several contiguous black pixels will lead to a value of ”filled” for the mark detection zone. If the form contains frames for the mark but the frame will be color dropped then the No Frame option should be selected.

Mark sensitivity: Low to High — for well-printed, high quality forms, the sensitivity should be set to High. When High is selected, small marks of just a few contiguous black pixels will lead to a value of “filled”. For poor quality forms a lower sensitivity will allow speckles or visible paper fibers to be ignored resulting in successful processing.

Add zone to group — select this option if this mark detection zone is associated with other mark detection zones and a single result is desired for the group of associated zones. For example, a form presents a question with three check boxes, “Like”, “Dislike” and “Do not care”. Three mark detection zones are defined, one for each possible response. All three mark detection zones would have this option selected and be added to the same group.