Grooper Help - Version 25.0
25.0.0017 2,127
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OMR Reader

Result Processor Grooper.Extract

Detects and reads optical marks (checkboxes) associated with each extractor result using OMR.

Remarks

The OMR Reader result processor enables extraction of checkbox or optical mark values from a document, associating each mark with a label detected by an upstream extractor.

This processor is used to determine whether checkboxes or similar marks are checked or unchecked, and to output their values in a format suitable for downstream processing.

> Note: This processor requires Layout Data generated by the Box Detection or Box Removal IP commands during Image Processing or > Recognize. Ensure input documents have been processed accordingly.

How It Works

  • For each extractor result (label), the OMR Reader searches for a nearby checkbox (OMR box) in the specified direction(s) and within the allowed distance.
  • The 'Box Location' and 'Max Distance' properties control where and how far to search for OMR boxes relative to each label.
  • The 'Mode' property determines how checked/unchecked status is interpreted and output (single, multiple, or boolean).
  • Output values and formatting can be customized using the 'Separator String', 'Value If Checked', and 'Value If Unchecked' properties.

Configuration Guidance

  • Set 'Box Location' to specify the direction(s) to search for OMR boxes relative to each label (e.g., left, right, above, below).
  • Adjust 'Max Distance' to control the maximum allowed gap between a label and its associated OMR box.
  • Choose the appropriate 'Mode' for your use case: single selection, multi-selection, or boolean.
  • Use 'Separator String' to define how multiple checked values are joined in the output.
  • Set 'Value If Checked' and 'Value If Unchecked' to control the output for boolean mode.

Usage Notes

  • Use Labeled OMR for the latest implementation of OMR extraction with improved accuracy and flexibility.
  • The OMR Reader is ideal for extracting values from forms, surveys, or any document with checkboxes or optical marks.
  • Proper configuration of box detection and layout processing is essential for accurate results.
  • Test extraction on representative samples and adjust settings as needed for your document layout.

Properties

NameTypeDescription

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