Changing the Length of the Barcodes to Decode

By default the Scandit Barcode Scanner scans barcodes with a fixed symbol count range. Under certain conditions it is helpful to modify the length of the barcode to be decoded, for example if

  • you want to scan longer codes which can not be decoded with the default settings.
  • to optimize decoder performance for codes of certain lengths; when it is known that the application only requires scanning of particular barcode lengths.

The mapping from characters to symbols is symbology-specific. For some symbologies, the start and end characters are included, others include checksums characters in the symbol counts.

The active symbol count setting is ignored for fixed-size barcodes (the EAN and UPC family of codes) as well as 2d codes. For other symbologies, see Calculating symbol counts for variable-length symbologies.

Change the barcode length

Changing the length of the barcodes is done through activeSymbolCounts on the symbology settings object. Following an example of changing for Code 128 barcodes the symbol count range (4-20).

Var symbolcounts = [4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20];
settings.getSymbologySettings(Scandit.Barcode.Symbology.CODE128).activeSymbolCounts = symbolcounts;

Available since SDK version 4.11.0.