Reading Data Matrix Codes¶

This code snippet shows how to read data matrix codes and retrieve the decoded string.

C++¶

#include <eVision/EasyMatrixCode/EasyMatrixCode2/EMatrixCodeReader.h>

using namespace eVision;
namespace EMC2 = eVision::EasyMatrixCode2;
// Load an image
EImageBW8 image;
image.Load("image.bmp");
// Prepare a matrix code reader
EMC2::EMatrixCodeReader reader;
// Let the reader know that there are no more than 3 codes in the image
reader.SetMaxNumCodes(3);
// Read the source image
reader.Read(image);
// Retrieve the detected codes
std::vector<EMC2::EMatrixCode> codes = reader.GetReadResults();
// Retrieve the decoded string for the first code
std::string result = codes[0].GetDecodedString();

C#¶

using eVision;
using EMC2 = eVision.EasyMatrixCode2;

// Load an image
EImageBW8 image = new EImageBW8();
image.Load("image.bmp");
// Prepare a matrix code reader
EMC2.EMatrixCodeReader reader = new EMC2.EMatrixCodeReader();
// Let the reader know that there are no more than 3 codes in the image
reader.MaxNumCodes = 3;
// Read the source image
reader.Read(image);
// Retrieve the detected codes
EMC2.EMatrixCode[] codes = reader.ReadResults;
// Retrieve the decoded string for the first code
string result = codes[0].DecodedString;

Python¶

import eVision
from eVision import EasyMatrixCode2 as EMC2
# Load an image
image = eVision.EImageBW8()
image.Load("image.bmp")
# Prepare a matrix code reader
reader = EMC2.EMatrixCodeReader()
# Let the reader know that there are no more than 3 codes in the image
reader.MaxNumCodes = 3
# Read the source image
codes = reader.Read(image)
# Retrieve the decoded string for the first code
result = codes[0].DecodedString