2D Reader

A combination of the following flags:

The 'Barcode Symbologies' property determines which types of two-dimensional (matrix) barcodes the [2D Reader] will search for during detection. Selecting only the symbologies present in your documents improves performance and reduces the risk of false positives.

Usage and Configuration

• Enable only the 2D barcode types you expect to encounter (e.g., DataMatrix).
• If unsure, start with a broad selection and review diagnostic output to refine your configuration.

Impact

• Limiting symbologies increases speed and accuracy.
• Enabling unnecessary symbologies may result in slower processing or incorrect barcode values.

Example

• For pharmaceutical packaging, enable DataMatrix to extract encoded lot numbers.
• For forms processing, enable DataMatrix to capture form IDs or batch numbers.

Review diagnostic output to fine-tune settings and ensure reliable barcode extraction across your document set.

The 'Minimum Size' property sets the smallest allowable width or height (in unit-aware values, such as inches or points) for regions considered as potential 2D barcodes. This helps filter out small, irrelevant regions and focuses detection on appropriately sized candidates.

Usage and Configuration

• Enter a value such as 0.225in or 6mm to set the minimum size.
• Adjust this value based on the expected minimum size of 2D barcodes in your documents.

Impact

• A larger value reduces false positives but may miss very small barcodes.
• A smaller value increases detection coverage but may include noise or artifacts.

Example

• For standard Data Matrix codes on pharmaceutical cartons, 0.225in is often appropriate.
• For documents with very small barcodes, decrease the value as needed.

The 'Maximum Size' property sets the largest allowable width or height (in unit-aware values, such as inches or points) for regions considered as potential 2D barcodes. This helps filter out large, irrelevant regions and focuses detection on appropriately sized candidates.

Usage and Configuration

• Enter a value such as 1in or 25mm to set the maximum size.
• Adjust this value based on the expected maximum size of 2D barcodes in your documents.

Impact

• A smaller value reduces false positives but may miss unusually large barcodes.
• A larger value increases detection coverage but may include irrelevant regions, increasing false positives.

Example

• For standard Data Matrix codes, 1in is often appropriate.
• For documents with larger barcodes, increase the value as needed.

A combination of the following flags:

The 'Read Directions' property determines which directions the Barcode Reader will scan when searching for barcodes within an image. By default, the reader scans in all supported directions, but you can limit or expand the search to target specific orientations as needed.

Usage and Configuration

• Select one or more directions to match the expected orientation(s) of barcodes in your documents.
• Common directions include South (top-to-bottom), North (bottom-to-top), East (left-to-right), and West (right-to-left).
• Multiple directions can be enabled to detect barcodes with inconsistent or mixed orientations.

Impact and Considerations

• Enabling all directions increases the likelihood of detecting barcodes regardless of their placement, but may increase processing time.
• Some barcode types may yield different values if read upside down or in a non-standard orientation. For example, a Patch T barcode read upside down may be interpreted as a Patch 3.
• Restricting directions can improve performance and reduce false positives if you know the expected orientation.

Example

• For documents scanned in a consistent orientation, select only the primary direction (e.g., South).
• For mixed or uncertain orientations, enable multiple directions to ensure all barcodes are detected.