Retrieving the Decoded String (Safe)¶

This code snippet shows how to read a QR code and retrieve the decoded string.

C++¶

#include <eVision/EasyQRCode/EQRCodeReader.h>

using namespace eVision;

// Image constructor
EImageBW8 srcImage;

// QR code reader constructor
EQRCodeReader reader;

// ...

// Read
std::vector<EQRCode> qrCodes = reader.Read(srcImage);

// Retrieve the data of the first QR code found
std::string decodedString = "";
try
{
  // The QR Code can be fully decoded without user input
  decodedString = qrCodes[0].GetDecodedString();
}
catch (EException exc)
{
  // Handle the exception

  // The QR Code cannot be fully decoded without user input
  // use hexadecimal byte interpretation
  decodedString = qrCodes[0].GetDecodedString(EByteInterpretationMode_Hexadecimal);
}

C#¶

using eVision;

// Image constructor
EImageBW8 srcImage = new EImageBW8();

// QR code reader constructor
EQRCodeReader reader = new EQRCodeReader();

// ...

// Read
EQRCode[] qrCodes = reader.Read(srcImage);

// Retrieve the data of the first QR code found
string decodedString = "";
try
{
  // The QR Code can be fully decoded without user input
  decodedString = qrCodes[0].GetDecodedString();
}
catch (EException)
{
  // Handle the exception

  // The QR Code cannot be fully decoded without user input
  // use hexadecimal byte interpretation
  decodedString = qrCodes[0].GetDecodedString(EByteInterpretationMode.Hexadecimal);
}

Python¶

import eVision
src_image = eVision.EImageBW8()

# QR code reader constructor
reader = eVision.EQRCodeReader()

# ...

# Read
qr_codes = reader.Read(src_image)

# Retrieve the data of the first QR code found
decoded_string = ""
try:
    # The QR Code can be fully decoded without user input
    decoded_string = qr_codes[0].GetDecodedString()
except eVision.EException as exc:
    # Handle the exception

    # The QR Code cannot be fully decoded without user input
    # use hexadecimal byte interpretation
    decoded_string = qr_codes[0].GetDecodedString(eVision.EByteInterpretationMode.Hexadecimal)