EasyQRCode - Reading QR Codes¶

Purpose of the EasyQRCode library¶

The EasyQRCode library allows reading QR codes in an image:

The reading is fast and robust.
Several codes can be read in the same image.
The processing can be limited to an ERegion in the image.
Specific support is provided for codes arranged in a grid.
The QR codes can be graded according to the ISO 15415 or ISO 29158 standards.

Reading a QR Code¶

You can read the QR code in an image automatically as follows:

Create an EQRCodeReader ^.NET ^Python object.
Call the EQRCodeReader::Read ^.NET ^Python method to return a vector of EQRCode ^.NET ^Python.
Each instance contains, among others, the decoded string ^.NET ^Python embedded in the QR code.

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 decoded string in best guess mode from the first QR Code
std::string decoded_string = qrCodes[0].GetDecodedString(EByteInterpretationMode_Auto);

using eVision;

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

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

// ...

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

// Retrieve the decoded string in best guess mode from the first QR Code
string decoded_string = qrCodes[0].GetDecodedString(EByteInterpretationMode.Auto);

Python

import eVision
# Image constructor
src_image = eVision.EImageBW8()

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

# ...

# Detect QRCodes in src_image
qr_codes = reader.Read(src_image)

# Retrieve the decoded string in best guess mode from the first QR Code
decoded_string = qr_codes[0].GetDecodedString(eVision.EByteInterpretationMode.Auto)