Grading a QR Code¶

This code snippet shows how to read a QR code and retrieve its print quality grades.

C++¶

#include <eVision/EasyQRCode/EQRCodeReader.h>

using namespace eVision;

// Load an image
EImageBW8 image;
image.Load("image.bmp");

// Prepare a qr code reader
EQRCodeReader reader;

// Tell the reader to compute grades for the codes read
reader.SetComputeGrading(true);

// Read the codes in this image
std::vector<EQRCode> codes = reader.Read(image);

// Retrieve the detected codes
// Retrieve the ISO15415 grades of the first code
EQRCodeIso15415GradingParameters grades = codes[0].GetIso15415GradingParameters();

// Retrieve the scan grade of the code
int scanGrade = grades.ScanGrade;

C#¶

using eVision;

// Load an image
EImageBW8 image = new EImageBW8();
image.Load("image.bmp");

// Prepare a qr code reader
EQRCodeReader reader = new EQRCodeReader(); ;

// Tell the reader to compute grades for the codes read
reader.ComputeGrading = true;

// Read the codes in this image
EQRCode[] codes = reader.Read(image);

// Retrieve the detected codes
// Retrieve the ISO15415 grades of the first code
EQRCodeIso15415GradingParameters grades = codes[0].Iso15415GradingParameters;

// Retrieve the scan grade of the code
int scanGrade = grades.ScanGrade;

Python¶

import eVision

# Load an image
image = eVision.EImageBW8()
image.Load("image.bmp")

# Prepare a qr code reader
reader = eVision.EQRCodeReader() 

# Tell the reader to compute grades for the codes read
reader.ComputeGrading = True

# Read the codes in this image
codes = reader.Read(image)

# Retrieve the detected codes
# Retrieve the ISO15415 grades of the first code
grades = codes[0].Iso15415GradingParameters

# Retrieve the scan grade of the code
scanGrade = grades.ScanGrade