如何使用 C# 从图像中读取条形码

using IronBarCode;
using System;

var myBarcode = BarcodeReader.Read(@"image_file_path.jpg"); //image file path

foreach (var item in myBarcode)
{
    Console.WriteLine(item.ToString());
}

Imports IronBarCode
Imports System

Private myBarcode = BarcodeReader.Read("image_file_path.jpg") 'image file path

For Each item In myBarcode
	Console.WriteLine(item.ToString())
Next item

using IronBarCode;
using IronSoftware.Drawing;
using System;
using System.Linq;

// Create custom reader options
var options = new BarcodeReaderOptions()
{
    // Specify expected barcode types for better performance
    ExpectBarcodeTypes = BarcodeEncoding.QRCode | BarcodeEncoding.Code128 | BarcodeEncoding.Code39,
    
    // Define specific area to scan (x, y, width, height in pixels)
    CropArea = new Rectangle(100, 100, 500, 400),
    
    // Set reading speed to balance accuracy and performance
    Speed = ReadingSpeed.Balanced,
    
    // Enable multithreading for better performance
    Multithreaded = true,
    MaxParallelThreads = 4,
    
    // Remove false positives for accuracy
    RemoveFalsePositive = true,

    // Minimum scan lines that must agree for a valid result (default 2)
    MinScanLines = 1,

    // Enable Code39 extended mode if needed
    UseCode39ExtendedMode = true,
    
    // Set scan mode
    ScanMode = BarcodeScanMode.Auto,
    
    // Add image filters for better recognition
    ImageFilters = new ImageFilterCollection() { 
        new SharpenFilter(),
        new InvertFilter(),
        new ContrastFilter()
    }
};

// Read barcodes with custom options
var results = BarcodeReader.Read(@"C:\path\to\your\barcode-image.png", options);

// Process results
if (results.Any())
{
    foreach (var barcode in results)
    {
        Console.WriteLine($"Barcode Type: {barcode.BarcodeType}");
        Console.WriteLine($"Value: {barcode.Value}");
        Console.WriteLine($"Position: {string.Join(", ", barcode.Points.Select(p => $"({p.X}, {p.Y})"))}");
        Console.WriteLine("---");
    }
}
else
{
    Console.WriteLine("No barcodes found in the image.");
}

Imports IronBarCode
Imports IronSoftware.Drawing
Imports System
Imports System.Linq

' Create custom reader options
Dim options As New BarcodeReaderOptions() With {
    ' Specify expected barcode types for better performance
    .ExpectBarcodeTypes = BarcodeEncoding.QRCode Or BarcodeEncoding.Code128 Or BarcodeEncoding.Code39,
    
    ' Define specific area to scan (x, y, width, height in pixels)
    .CropArea = New Rectangle(100, 100, 500, 400),
    
    ' Set reading speed to balance accuracy and performance
    .Speed = ReadingSpeed.Balanced,
    
    ' Enable multithreading for better performance
    .Multithreaded = True,
    .MaxParallelThreads = 4,
    
    ' Remove false positives for accuracy
    .RemoveFalsePositive = True,

    ' Minimum scan lines that must agree for a valid result (default 2)
    .MinScanLines = 1,

    ' Enable Code39 extended mode if needed
    .UseCode39ExtendedMode = True,
    
    ' Set scan mode
    .ScanMode = BarcodeScanMode.Auto,
    
    ' Add image filters for better recognition
    .ImageFilters = New ImageFilterCollection() From {
        New SharpenFilter(),
        New InvertFilter(),
        New ContrastFilter()
    }
}

' Read barcodes with custom options
Dim results = BarcodeReader.Read("C:\path\to\your\barcode-image.png", options)

' Process results
If results.Any() Then
    For Each barcode In results
        Console.WriteLine($"Barcode Type: {barcode.BarcodeType}")
        Console.WriteLine($"Value: {barcode.Value}")
        Console.WriteLine($"Position: {String.Join(", ", barcode.Points.Select(Function(p) $"({p.X}, {p.Y})"))}")
        Console.WriteLine("---")
    Next
Else
    Console.WriteLine("No barcodes found in the image.")
End If