ChecksumValidation Class Reference

Enable checksum validation during recognition for 1D barcodes. More...

Inherits Enum.

Static Public Attributes
int	DEFAULT = 0
int	ON = 1
int	OFF = 2

Detailed Description

Enable checksum validation during recognition for 1D barcodes.

Default is treated as Yes for symbologies which must contain checksum, as No where checksum only possible.

Checksum never used: Codabar

Checksum is possible: Code39 Standard/Extended, Standard2of5, Interleaved2of5, Matrix2of5, ItalianPost25, DeutschePostIdentcode, DeutschePostLeitcode, VIN

Checksum always used: Rest symbologies

This sample shows influence of ChecksumValidation on recognition quality and results

generator = BarcodeGenerator(EncodeTypes.EAN_13, "1234567890128")
generator.save("test.png", BarCodeImageFormat.PNG)
reader = Recognition.BarCodeReader("test.png", None, DecodeType.EAN_13)
#checksum disabled
reader.setChecksumValidation(ChecksumValidation.OFF)
for result in reader.readBarCodes():
   print("BarCode CodeText: " + result.getCodeText())
   print("BarCode Value: " + result.getExtended().getOneD().getValue())
   print("BarCode Checksum: " + result.getExtended().getOneD().getCheckSum())
reader = Recognition.BarCodeReader("test.png", None, DecodeType.EAN_13)
#checksum enabled
reader.setChecksumValidation(ChecksumValidation.ON)
for result in reader.readBarCodes():
   print("BarCode CodeText: " + result.getCodeText())
   print("BarCode Value: " + result.getExtended().getOneD().getValue())
   print("BarCode Checksum: " + result.getExtended().getOneD().getCheckSum())

Member Data Documentation

DEFAULT

int DEFAULT = 0

static

OFF

int OFF = 2

static

ON

int ON = 1

static