› Capture Profile Configuration › Recognition › Marks (OMR)

Marks (OMR)

The recognition engine used for Optical Mark Recognition (OMR) is configured here.

Under Mark determination options:

Mark threshold

This feature checks that the marked weight of a zone box is greater than the base weight by at least the defined amount. Move the slider to set a number between 0 and 1000.

This setting is used to counteract the effect of noise and stray marks on the scoring process. If a user does not mark any box in a zone, without a mark threshold set, the box with the most random noise is reported as marked. If the mark threshold is set high enough that the weight from noise on the page does not cross the threshold, zones that have no actual mark are reported as blank.

Difference threshold

This feature ensures that the reported, marked weight of a zone box differs from the other boxes in the same zone by a defined minimum amount. Move the slider to set a number between 0 and 1000.

This setting improves the accuracy when multiple boxes in a zone have marks. Example: If the marks are being made with a felt tip marker and the user drags the marker across all boxes in a zone, without this setting, the engine would report a mark in the box that reports the darkest mark, which very likely is a small variation from the marks in the other boxes, and may not be easily identifiable to the eye.

Ignore Base Weight values when evaluating marks

Selecting this option causes the base weight of the zone to be set to 0 and ignore the template image loaded into the configured capture profile. This setting is recommended for use when drawing zones on a color image. However, the scanned production documents have the color dropped out.

Enhance marks

This option darkens the marks in defined zones to improve reading accuracy when capturing documents with low variance between marked and unmarked areas.

Under Other options:

Store image used for mark recognition as alternate page file

Stores a copy of the image used for OMR zone definition as the alternate page.

Run mark recognition against an alternate page file

If an alternate page is present, it is used as a baseline for comparison with the actual image.

Alternate page file tag

Assign a tag to the OMR image file being saved as an alternate page file.

Under Mark tags, select the check box to assign tags to marks with one of the listed methods:

  • By Weight

  • By Net Weight

  • By Adjusted Net Weight

  • By Scaled Weight

Different tags can be assigned depending on the defined conditions.