CombDetectionType

Specifies the available modes for detecting and removing combs—short line segments connected to perpendicular lines—in Line Detection.

Remarks

The CombDetectionType enumeration determines how combs are identified and removed during line detection. A comb is a short line segment, such as a checkbox, tick mark, or grid stub, that is connected to a perpendicular line at one or both ends. Removing combs is important for cleaning up forms with checkboxes, comb fields, or dense table grids, where these features can interfere with data extraction or be mistaken for field boundaries.

Choosing the appropriate mode helps balance the removal of unwanted artifacts with the preservation of important form structure.

• Use 'None' to preserve all short line segments.
• Use 'Single' or 'Double' to target specific comb configurations.
• Use 'All' to remove all detected combs.

Review diagnostic images to ensure that only unwanted combs are removed and that important form structure is preserved. Tune related properties such as 'Minimum Length', 'Minimum Fill', and 'Quiet Zone Size' for best results on your document set.

Can be one of the following values:

Used By

Line RemovalLine Detection