如何在 C# 中从System.Drawing读取条形码

using IronSoftware.Drawing;
using System.Collections.Generic;

List<AnyBitmap> barcodes = new List<AnyBitmap>();

// Instantiate System.Drawing.Bitmap
System.Drawing.Bitmap bitmapFromBitmap = new System.Drawing.Bitmap("test1.jpg");

// Cast from System.Drawing.Bitmap to AnyBitmap
AnyBitmap barcode1 = bitmapFromBitmap;

barcodes.Add(barcode1);

// Instantiate System.Drawing.Bitmap
System.Drawing.Image bitmapFromFile = System.Drawing.Image.FromFile("test2.png");

// Cast from System.Drawing.Image to AnyBitmap
AnyBitmap barcode2 = bitmapFromFile;

barcodes.Add(barcode2);

Imports IronSoftware.Drawing
Imports System.Collections.Generic

Private barcodes As New List(Of AnyBitmap)()

' Instantiate System.Drawing.Bitmap
Private bitmapFromBitmap As New System.Drawing.Bitmap("test1.jpg")

' Cast from System.Drawing.Bitmap to AnyBitmap
Private barcode1 As AnyBitmap = bitmapFromBitmap

barcodes.Add(barcode1)

' Instantiate System.Drawing.Bitmap
Dim bitmapFromFile As System.Drawing.Image = System.Drawing.Image.FromFile("test2.png")

' Cast from System.Drawing.Image to AnyBitmap
Dim barcode2 As AnyBitmap = bitmapFromFile

barcodes.Add(barcode2)

// Implicit casting - clean and simple for straightforward conversions
System.Drawing.Bitmap systemBitmap = new System.Drawing.Bitmap("barcode.png");
AnyBitmap anyBitmap = systemBitmap; // Implicit cast

// Explicit casting - useful when type clarity is important
System.Drawing.Image systemImage = System.Drawing.Image.FromFile("qrcode.jpg");
AnyBitmap explicitBitmap = (AnyBitmap)systemImage; // Explicit cast

// When working with nullable types or conditional logic
System.Drawing.Bitmap? nullableBitmap = GetBitmapFromSource();
if (nullableBitmap != null)
{
    AnyBitmap result = (AnyBitmap)nullableBitmap; // Explicit cast for clarity
    // Process the barcode
}

Imports System.Drawing

' Implicit casting - clean and simple for straightforward conversions
Dim systemBitmap As New Bitmap("barcode.png")
Dim anyBitmap As AnyBitmap = systemBitmap ' Implicit cast

' Explicit casting - useful when type clarity is important
Dim systemImage As Image = Image.FromFile("qrcode.jpg")
Dim explicitBitmap As AnyBitmap = CType(systemImage, AnyBitmap) ' Explicit cast

' When working with nullable types or conditional logic
Dim nullableBitmap As Bitmap = GetBitmapFromSource()
If nullableBitmap IsNot Nothing Then
    Dim result As AnyBitmap = CType(nullableBitmap, AnyBitmap) ' Explicit cast for clarity
    ' Process the barcode
End If

using IronBarCode;
using IronSoftware.Drawing;
using System;
using System.Collections.Generic;

List<AnyBitmap> barcodes = new List<AnyBitmap>();

System.Drawing.Bitmap bitmapFromBitmap = new System.Drawing.Bitmap("test1.jpg");
AnyBitmap barcode1 = bitmapFromBitmap;
barcodes.Add(barcode1);

System.Drawing.Image bitmapFromFile = System.Drawing.Image.FromFile("test2.png");
AnyBitmap barcode2 = bitmapFromFile;
barcodes.Add(barcode2);

foreach (var barcode in barcodes)
{
    // Read the barcode
    var results = BarcodeReader.Read(barcode);
    foreach (var result in results)
    {
        // Output the detected barcode value
        Console.WriteLine(result.Value);
    }
}

Imports IronBarCode
Imports IronSoftware.Drawing
Imports System
Imports System.Collections.Generic

Private barcodes As New List(Of AnyBitmap)()

Private bitmapFromBitmap As New System.Drawing.Bitmap("test1.jpg")
Private barcode1 As AnyBitmap = bitmapFromBitmap
barcodes.Add(barcode1)

Dim bitmapFromFile As System.Drawing.Image = System.Drawing.Image.FromFile("test2.png")
Dim barcode2 As AnyBitmap = bitmapFromFile
barcodes.Add(barcode2)

For Each barcode In barcodes
	' Read the barcode
	Dim results = BarcodeReader.Read(barcode)
	For Each result In results
		' Output the detected barcode value
		Console.WriteLine(result.Value)
	Next result
Next barcode

// Advanced barcode reading with options
var readerOptions = new BarcodeReaderOptions
{
    // Specify barcode types to search for
    ExpectBarcodeTypes = BarcodeEncoding.QRCode | BarcodeEncoding.Code128,
    // Enable machine learning for better accuracy
    UseML = true,
    // Set confidence threshold
    Confidence = 0.95
};

// Read with specific options
var advancedResults = BarcodeReader.Read(anyBitmap, readerOptions);

' Advanced barcode reading with options
Dim readerOptions As New BarcodeReaderOptions With {
    ' Specify barcode types to search for
    .ExpectBarcodeTypes = BarcodeEncoding.QRCode Or BarcodeEncoding.Code128,
    ' Enable machine learning for better accuracy
    .UseML = True,
    ' Set confidence threshold
    .Confidence = 0.95
}

' Read with specific options
Dim advancedResults = BarcodeReader.Read(anyBitmap, readerOptions)

// Parallel processing for multiple barcode images
var barcodeFiles = Directory.GetFiles("barcodes/", "*.png");
var allResults = new ConcurrentBag<BarcodeResult>();

Parallel.ForEach(barcodeFiles, file =>
{
    var bitmap = new System.Drawing.Bitmap(file);
    var anyBitmap = (AnyBitmap)bitmap;
    var results = BarcodeReader.Read(anyBitmap);

    foreach (var result in results)
    {
        allResults.Add(result);
    }

    bitmap.Dispose(); // Clean up resources
});

// Process all results
foreach (var result in allResults)
{
    Console.WriteLine($"Found {result.BarcodeType}: {result.Value}");
}

Imports System.IO
Imports System.Collections.Concurrent
Imports System.Drawing
Imports System.Threading.Tasks

' Parallel processing for multiple barcode images
Dim barcodeFiles = Directory.GetFiles("barcodes/", "*.png")
Dim allResults = New ConcurrentBag(Of BarcodeResult)()

Parallel.ForEach(barcodeFiles, Sub(file)
                                   Dim bitmap = New Bitmap(file)
                                   Dim anyBitmap = CType(bitmap, AnyBitmap)
                                   Dim results = BarcodeReader.Read(anyBitmap)

                                   For Each result In results
                                       allResults.Add(result)
                                   Next

                                   bitmap.Dispose() ' Clean up resources
                               End Sub)

' Process all results
For Each result In allResults
    Console.WriteLine($"Found {result.BarcodeType}: {result.Value}")
Next

// Using IronDrawing for image preprocessing
using IronSoftware.Drawing;

// Load and preprocess an image before barcode reading
AnyBitmap preprocessedImage = AnyBitmap.FromFile("noisy-barcode.jpg");

// Apply image filters to improve barcode readability
preprocessedImage = preprocessedImage.ToGrayScale();
preprocessedImage = preprocessedImage.Contrast(1.5); // Increase contrast
preprocessedImage = preprocessedImage.Sharpen(); // Sharpen image

// Read the preprocessed barcode
var improvedResults = BarcodeReader.Read(preprocessedImage);

Imports IronSoftware.Drawing

' Load and preprocess an image before barcode reading
Dim preprocessedImage As AnyBitmap = AnyBitmap.FromFile("noisy-barcode.jpg")

' Apply image filters to improve barcode readability
preprocessedImage = preprocessedImage.ToGrayScale()
preprocessedImage = preprocessedImage.Contrast(1.5) ' Increase contrast
preprocessedImage = preprocessedImage.Sharpen() ' Sharpen image

' Read the preprocessed barcode
Dim improvedResults = BarcodeReader.Read(preprocessedImage)