如何在C#中使用網路攝影機建立條碼掃描器？

您可以在C#中使用IronBarcode和網路攝影機建立條碼掃描器。這涉及從網路攝影機擷取影片框架並即時解碼條碼和QR碼，僅需極少的程式碼。

使用網路攝影機進行條碼掃描有什麼好處？

使用網路攝影機進行條碼掃描省去對專用硬體的需求，讓任何連接的攝影機都可成為強大的條碼讀取器。這對於各種應用來說既經濟又多功能。

是否可以在C#中使用網路攝影機解碼QR碼？

是的，透過IronBarcode，您可以在C#中使用網路攝影機解碼QR碼。這個程式庫能擷取即時影片框架並流暢地處理以提取QR碼資料。

哪些應用程式能夠從C#中使用網路攝影機條碼掃描器中受益？

零售、庫存管理和物流等應用程式可以從C#中的網路攝影機條碼掃描器中受益。它為條碼和QR碼掃描提供了一種靈活且具成本效益的解決方案。

IronBarcode是否支援即時條碼解碼？

是的，IronBarcode支援即時條碼解碼。它處理來自網路攝影機的即時影片框架以立即解碼條碼和QR碼。

是否提供建構網路攝影機條碼掃描器的源程式碼？

是的，提供了於C#中建構基於控制台的網路攝影機條碼掃描器的完整源程式碼。這有助於開發者高效地理解和實現該解決方案。

使用IronBarcode與網路攝影機可以解碼哪些型別的條碼？

IronBarcode可以解碼多種型別的條碼，包括QR碼、UPC、EAN和Code 128等，使用網路攝影機在C#中進行解碼。

我需要具備先進的程式設計技能才能使用IronBarcode建構條碼掃描器嗎？

不，您不需要具備先進的程式設計技能即可使用IronBarcode建構條碼掃描器。這個過程僅涉及幾行程式碼，使其對於各種技能水平的開發者都是可行的。

How does IronBarcode compare to other barcode reader libraries?

IronBarcode offers ease of implementation by eliminating the need for manual video stream setup required by other libraries like ZXing.NET or Dynamsoft Barcode Reader SDK. It provides a unified interface for capturing and decoding barcodes efficiently.

Where can I find resources to start coding a barcode scanner with a webcam in C#?

You can start with the full source code provided in the guide on the Iron Software website, which outlines the process of building a barcode scanner using a webcam in C# with IronBarcode and OpenCvSharp.

C# 條碼程式庫

Explore IronBarcode 開始免費試用

條碼快速入門

查看所有程式碼範例

using IronBarCode;
using System.Drawing;

// Reading a barcode is easy with IronBarcode!
var resultFromFile = BarcodeReader.Read(@"file/barcode.png"); // From a file
var resultFromBitMap = BarcodeReader.Read(new Bitmap("barcode.bmp")); // From a bitmap
var resultFromImage = BarcodeReader.Read(Image.FromFile("barcode.jpg")); // From an image file
var resultFromPdf = BarcodeReader.ReadPdf(@"file/mydocument.pdf"); // From PDF use ReadPdf

// To configure and fine-tune barcode reading, utilize the BarcodeReaderOptions class
var myOptionsExample = new BarcodeReaderOptions
{
    // Choose a reading speed from: Faster, Balanced, Detailed, ExtremeDetail
    // There is a tradeoff in performance as more detail is set
    Speed = ReadingSpeed.Balanced,

    // Reader will stop scanning once a single barcode is found (if set to true)
    ExpectMultipleBarcodes = true,

    // By default, all barcode formats are scanned for
    // Specifying a subset of barcode types to search for would improve performance
    ExpectBarcodeTypes = BarcodeEncoding.AllOneDimensional,

    // Utilize multiple threads to read barcodes from multiple images in parallel
    Multithreaded = true,

    // Maximum threads for parallelized barcode reading
    // Default is 4
    MaxParallelThreads = 2,

    // The area of each image frame in which to scan for barcodes
    // Specifying a crop area will significantly improve performance and avoid noisy parts of the image
    CropArea = new Rectangle(),

    // Special setting for Code39 barcodes
    // If a Code39 barcode is detected, try to read with both the base and extended ASCII character sets
    UseCode39ExtendedMode = true
};

// Read with the options applied
var results = BarcodeReader.Read("barcode.png", myOptionsExample);

// Create a barcode with one line of code
var myBarcode = BarcodeWriter.CreateBarcode("12345", BarcodeWriterEncoding.EAN8);

// After creating a barcode, we may choose to resize
myBarcode.ResizeTo(400, 100);

// Save our newly-created barcode as an image
myBarcode.SaveAsImage("EAN8.jpeg");

// Get the barcode as an image for further processing
var myBarcodeImage = myBarcode.Image;

using IronBarCode;
using System.Drawing;

// Reading a barcode is easy with IronBarcode!
var resultFromFile = BarcodeReader.Read(@"file/barcode.png"); // From a file
var resultFromBitMap = BarcodeReader.Read(new Bitmap("barcode.bmp")); // From a bitmap
var resultFromImage = BarcodeReader.Read(Image.FromFile("barcode.jpg")); // From an image file
var resultFromPdf = BarcodeReader.ReadPdf(@"file/mydocument.pdf"); // From PDF use ReadPdf

// To configure and fine-tune barcode reading, utilize the BarcodeReaderOptions class
var myOptionsExample = new BarcodeReaderOptions
{
    // Choose a reading speed from: Faster, Balanced, Detailed, ExtremeDetail
    // There is a tradeoff in performance as more detail is set
    Speed = ReadingSpeed.Balanced,

    // Reader will stop scanning once a single barcode is found (if set to true)
    ExpectMultipleBarcodes = true,

    // By default, all barcode formats are scanned for
    // Specifying a subset of barcode types to search for would improve performance
    ExpectBarcodeTypes = BarcodeEncoding.AllOneDimensional,

    // Utilize multiple threads to read barcodes from multiple images in parallel
    Multithreaded = true,

    // Maximum threads for parallelized barcode reading
    // Default is 4
    MaxParallelThreads = 2,

    // The area of each image frame in which to scan for barcodes
    // Specifying a crop area will significantly improve performance and avoid noisy parts of the image
    CropArea = new Rectangle(),

    // Special setting for Code39 barcodes
    // If a Code39 barcode is detected, try to read with both the base and extended ASCII character sets
    UseCode39ExtendedMode = true
};

// Read with the options applied
var results = BarcodeReader.Read("barcode.png", myOptionsExample);

// Create a barcode with one line of code
var myBarcode = BarcodeWriter.CreateBarcode("12345", BarcodeWriterEncoding.EAN8);

// After creating a barcode, we may choose to resize
myBarcode.ResizeTo(400, 100);

// Save our newly-created barcode as an image
myBarcode.SaveAsImage("EAN8.jpeg");

// Get the barcode as an image for further processing
var myBarcodeImage = myBarcode.Image;

PM >Install-Package BarCode

Install-Package BarCode

使用IRONBARCODE

using C# 和網路攝影機建立條碼掃描器

Curtis Chau

Updated: 2026年6月28日

使用C#的網路攝影機條碼掃描器消除了需要實體條碼掃描器的需求，將任何連接的攝影機轉變為功能強大的條碼閱讀器。在這篇文章中，我們將引導您如何建立一個基於控制台的網路攝影機條碼掃描器，該掃描器能夠捕捉即時影片幀並即時解碼條碼和QR碼，這一切僅需幾行程式碼。

無論您是正在開發庫存系統原型、構建簽到機，還是對條碼掃描是如何工作感到好奇，本指南提供了可以立即運行的源程式碼。

第一步：

網路攝影機能否取代專用條碼掃描器？

絕對可以。任何標準的網路攝影機或連接到Windows、macOS或Linux機器的USB影片捕捉裝置，在搭配合適的軟體時，可以作為條碼掃描器使用。該過程是通過攝像頭捕捉影片幀，將每個幀轉換成位圖圖像，然後將該圖像傳遞給條碼閱讀器庫進行解碼。

傳統的條碼掃描設置涉及到工具，如Dynamsoft Barcode Reader SDK或DirectShow.NET，通常需要您手動配置過濾圖、設置捕捉圖並搭建幀回調管道才能從相機提取幀。 IronBarcode大大簡化了這一過程，無需構建複雜的影片流基礎架構。您只需提供圖像資料，BarcodeReader類即可處理其餘部分，支持從標準條碼到QR碼的一切，僅需單個讀取方法。

如何設置攝像頭並安裝依賴項？

要將影片幀從網路攝影機引入到.NET控制台應用程式中，需要一個攝像頭存取程式庫。 OpenCvSharp4是一個輕量級、跨平台的.NET包裝Opencv，使這一過程變得簡單明瞭。與IronBarcode結合，它為您提供了一切所需，以建立實時條碼掃描器，而不需與低層級影片捕捉裝置枚舉或幀率配置作鬥爭。

通過NuGet安裝這兩個套件：

> dotnet add package OpenCvSharp4.Windows, OpenCvSharp4.Extensions, BarCode

dotnet add package OpenCvSharp4.Windows, OpenCvSharp4.Extensions, BarCode

安裝完這三個套件後，您的專案將通過OpenCvSharp獲取攝影機存取權限，並通過IronBarcode進行條碼解碼。無需配置額外的系統依賴項或外部SDK，只需安裝並開始使用。

如何捕捉影片幀並即時閱讀條碼資料？

以下程式碼範例建立了一個基於Visual Studio的控制台條碼掃描器，它開啟您的預設網路攝影機，連續捕捉幀並掃描每個幀以查找條碼。當偵測到條碼時，資料會寫入控制台，並將幀保存為快照。

using OpenCvSharp;
using OpenCvSharp.Extensions;
using IronBarCode;
using IronSoftware.Drawing;
// Open the default camera (device index 0)
using var capture = new VideoCapture(0);
if (!capture.IsOpened())
{
    Console.WriteLine("No camera found. Check connected devices.");
    return;
}
// Configure the barcode reader for real-time scanning
var options = new BarcodeReaderOptions
{
    ExpectMultipleBarcodes = false,
    ExpectBarcodeTypes = BarcodeEncoding.All,
    Speed = ReadingSpeed.Faster
};
Console.WriteLine("Barcode scanner active. Press 'Q' to quit.");
using var frame = new Mat();
bool scanning = true;
while (scanning)
{
    capture.Read(frame);
    if (frame.Empty())
        continue;
    // Convert the captured frame to a bitmap for barcode processing
    var bitmap = BitmapConverter.ToBitmap(frame);
    var anyBitmap = new AnyBitmap(bitmap);
    // Scan the frame for barcodes
    var results = BarcodeReader.Read(anyBitmap, options);
    foreach (var result in results)
    {
        Console.WriteLine($"Barcode detected: {result.Value}");
        Console.WriteLine($"  Format: {result.BarcodeType}");
        // Save a snapshot of the frame where the barcode was found
        bitmap.Save("barcode_snapshot.png");
        Console.WriteLine("  Snapshot saved to barcode_snapshot.png");
    }
    // Check for quit key
    if (Cv2.WaitKey(1) == 'q')
        scanning = false;
}
Console.WriteLine("Scanner stopped.");

using OpenCvSharp;
using OpenCvSharp.Extensions;
using IronBarCode;
using IronSoftware.Drawing;
// Open the default camera (device index 0)
using var capture = new VideoCapture(0);
if (!capture.IsOpened())
{
    Console.WriteLine("No camera found. Check connected devices.");
    return;
}
// Configure the barcode reader for real-time scanning
var options = new BarcodeReaderOptions
{
    ExpectMultipleBarcodes = false,
    ExpectBarcodeTypes = BarcodeEncoding.All,
    Speed = ReadingSpeed.Faster
};
Console.WriteLine("Barcode scanner active. Press 'Q' to quit.");
using var frame = new Mat();
bool scanning = true;
while (scanning)
{
    capture.Read(frame);
    if (frame.Empty())
        continue;
    // Convert the captured frame to a bitmap for barcode processing
    var bitmap = BitmapConverter.ToBitmap(frame);
    var anyBitmap = new AnyBitmap(bitmap);
    // Scan the frame for barcodes
    var results = BarcodeReader.Read(anyBitmap, options);
    foreach (var result in results)
    {
        Console.WriteLine($"Barcode detected: {result.Value}");
        Console.WriteLine($"  Format: {result.BarcodeType}");
        // Save a snapshot of the frame where the barcode was found
        bitmap.Save("barcode_snapshot.png");
        Console.WriteLine("  Snapshot saved to barcode_snapshot.png");
    }
    // Check for quit key
    if (Cv2.WaitKey(1) == 'q')
        scanning = false;
}
Console.WriteLine("Scanner stopped.");

Imports OpenCvSharp
Imports OpenCvSharp.Extensions
Imports IronBarCode
Imports IronSoftware.Drawing

' Open the default camera (device index 0)
Using capture As New VideoCapture(0)
    If Not capture.IsOpened() Then
        Console.WriteLine("No camera found. Check connected devices.")
        Return
    End If

    ' Configure the barcode reader for real-time scanning
    Dim options As New BarcodeReaderOptions With {
        .ExpectMultipleBarcodes = False,
        .ExpectBarcodeTypes = BarcodeEncoding.All,
        .Speed = ReadingSpeed.Faster
    }
    Console.WriteLine("Barcode scanner active. Press 'Q' to quit.")

    Using frame As New Mat()
        Dim scanning As Boolean = True
        While scanning
            capture.Read(frame)
            If frame.Empty() Then
                Continue While
            End If

            ' Convert the captured frame to a bitmap for barcode processing
            Dim bitmap = BitmapConverter.ToBitmap(frame)
            Dim anyBitmap As New AnyBitmap(bitmap)

            ' Scan the frame for barcodes
            Dim results = BarcodeReader.Read(anyBitmap, options)
            For Each result In results
                Console.WriteLine($"Barcode detected: {result.Value}")
                Console.WriteLine($"  Format: {result.BarcodeType}")

                ' Save a snapshot of the frame where the barcode was found
                bitmap.Save("barcode_snapshot.png")
                Console.WriteLine("  Snapshot saved to barcode_snapshot.png")
            Next

            ' Check for quit key
            If Cv2.WaitKey(1) = AscW("q"c) Then
                scanning = False
            End If
        End While
    End Using
End Using

Console.WriteLine("Scanner stopped.")

Imports OpenCvSharp
Imports OpenCvSharp.Extensions
Imports IronBarCode
Imports IronSoftware.Drawing

' Open the default camera (device index 0)
Using capture As New VideoCapture(0)
    If Not capture.IsOpened() Then
        Console.WriteLine("No camera found. Check connected devices.")
        Return
    End If

    ' Configure the barcode reader for real-time scanning
    Dim options As New BarcodeReaderOptions With {
        .ExpectMultipleBarcodes = False,
        .ExpectBarcodeTypes = BarcodeEncoding.All,
        .Speed = ReadingSpeed.Faster
    }
    Console.WriteLine("Barcode scanner active. Press 'Q' to quit.")

    Using frame As New Mat()
        Dim scanning As Boolean = True
        While scanning
            capture.Read(frame)
            If frame.Empty() Then
                Continue While
            End If

            ' Convert the captured frame to a bitmap for barcode processing
            Dim bitmap = BitmapConverter.ToBitmap(frame)
            Dim anyBitmap As New AnyBitmap(bitmap)

            ' Scan the frame for barcodes
            Dim results = BarcodeReader.Read(anyBitmap, options)
            For Each result In results
                Console.WriteLine($"Barcode detected: {result.Value}")
                Console.WriteLine($"  Format: {result.BarcodeType}")

                ' Save a snapshot of the frame where the barcode was found
                bitmap.Save("barcode_snapshot.png")
                Console.WriteLine("  Snapshot saved to barcode_snapshot.png")
            Next

            ' Check for quit key
            If Cv2.WaitKey(1) = AscW("q"c) Then
                scanning = False
            End If
        End While
    End Using
End Using

Console.WriteLine("Scanner stopped.")

Using Webcam for Barcode Scanning in C#

使用網路攝影機在C#中建立條碼掃描器：圖像1-使用我們的條碼掃描器在C#中

此程式碼使用頂層語句來保持清晰。 VideoCapture物件開啟第一個連接的攝像頭源並開始迴圈拉取幀。每個幀都從OpenCvSharp Mat轉換為Bitmap，然後包裝在AnyBitmap中，這是IronBarcode的BarcodeReader.Read方法所接受的跨平台圖像格式。

BarcodeReaderOptions物件控制掃描行為。將Speed設置為ReadingSpeed.Faster可優化即時影片，以便獲取快速幀響應。將ExpectBarcodeTypes屬性設置為BarcodeEncoding.All，這意味著掃描器將檢測到所有支持的格式，從Code 128和EAN-13到Data Matrix和QR碼。如果您的用例僅涉及特定格式，縮小範圍將提高掃描性能。欲了解更多配置選項，請查看BarcodeReaderOptions參考文件。

foreach迴圈在返回集合中的每個BarcodeResult中迭代。 Value屬性包含解碼的條碼資料，而BarcodeType標識格式。該方法返回BarcodeResults集合，使您在需要時更容易處理多個條碼。

如何為不同的使用案例微調條碼閱讀器？

現實世界的條碼掃描通常涉及不完美條件、光線不足、傾斜角度或損壞的標籤。 IronBarcode的閱讀選項可讓您根據工作需要平衡速度與精準度。

using IronBarCode;
// Optimized options for scanning QR codes from a camera feed
var qrOptions = new BarcodeReaderOptions
{
    ExpectMultipleBarcodes = true,
    ExpectBarcodeTypes = BarcodeEncoding.QRCode | BarcodeEncoding.PDF417,
    Speed = ReadingSpeed.Detailed,
    AutoRotate = true
};
// Decode barcodes from a saved image captured by the webcam
var imageResults = BarcodeReader.Read("barcode_snapshot.png", qrOptions);
foreach (var barcode in imageResults)
{
    Console.WriteLine($"Data: {barcode.Value}");
    Console.WriteLine($"Type: {barcode.BarcodeType}");
    Console.WriteLine($"Page: {barcode.PageNumber}");
}

using IronBarCode;
// Optimized options for scanning QR codes from a camera feed
var qrOptions = new BarcodeReaderOptions
{
    ExpectMultipleBarcodes = true,
    ExpectBarcodeTypes = BarcodeEncoding.QRCode | BarcodeEncoding.PDF417,
    Speed = ReadingSpeed.Detailed,
    AutoRotate = true
};
// Decode barcodes from a saved image captured by the webcam
var imageResults = BarcodeReader.Read("barcode_snapshot.png", qrOptions);
foreach (var barcode in imageResults)
{
    Console.WriteLine($"Data: {barcode.Value}");
    Console.WriteLine($"Type: {barcode.BarcodeType}");
    Console.WriteLine($"Page: {barcode.PageNumber}");
}

Imports IronBarCode

' Optimized options for scanning QR codes from a camera feed
Dim qrOptions As New BarcodeReaderOptions With {
    .ExpectMultipleBarcodes = True,
    .ExpectBarcodeTypes = BarcodeEncoding.QRCode Or BarcodeEncoding.PDF417,
    .Speed = ReadingSpeed.Detailed,
    .AutoRotate = True
}

' Decode barcodes from a saved image captured by the webcam
Dim imageResults = BarcodeReader.Read("barcode_snapshot.png", qrOptions)
For Each barcode In imageResults
    Console.WriteLine($"Data: {barcode.Value}")
    Console.WriteLine($"Type: {barcode.BarcodeType}")
    Console.WriteLine($"Page: {barcode.PageNumber}")
Next

Imports IronBarCode

' Optimized options for scanning QR codes from a camera feed
Dim qrOptions As New BarcodeReaderOptions With {
    .ExpectMultipleBarcodes = True,
    .ExpectBarcodeTypes = BarcodeEncoding.QRCode Or BarcodeEncoding.PDF417,
    .Speed = ReadingSpeed.Detailed,
    .AutoRotate = True
}

' Decode barcodes from a saved image captured by the webcam
Dim imageResults = BarcodeReader.Read("barcode_snapshot.png", qrOptions)
For Each barcode In imageResults
    Console.WriteLine($"Data: {barcode.Value}")
    Console.WriteLine($"Type: {barcode.BarcodeType}")
    Console.WriteLine($"Page: {barcode.PageNumber}")
Next

多種條碼讀取輸出：以QR碼為例

使用網路攝影機在C#中建立條碼掃描器：圖像2-使用我們的條碼掃描器讀取QR碼

將Speed切換為ReadingSpeed.Detailed告訴解碼器應用更徹底的圖像分析，這是處理噪音或傾斜輸入資料的理想選擇。啟用AutoRotate允許IronBarcode自動校正圖像中的旋轉條碼，這是當使用者以奇怪的角度在攝像頭前拿著物品時的常見場景。這是IronBarcode作為QR碼庫及條碼閱讀器真正出眾的地方：其內建的圖像預處理可處理這些挑戰，不需要您連接外部圖像校正濾波器。

您也可以使用同一個BarcodeReader API從保存的圖像文件、PDF和多幀TIFF中掃描條碼，這使得它在網路攝影機使用案例之外也非常靈活。如果您正在建立一個基於網路的掃描器，IronBarcode Blazor整合指南涵蓋了如何使用JavaScript互通通過瀏覽器進行網路攝影機掃描。

這種方法為何比其他方法簡單？

許多C#中的網路攝影機條碼掃描器教程依賴於多程式庫組合，通常是使用ZXing.NET進行解碼，搭配AForge.NET或DirectShow.NET進行攝影機存取。這種方法需要建立一個影片捕捉過濾圖，手動配置幀回調以從影片流中提取幀，並通過低層級Windows API處理裝置枚舉。Dynamsoft Barcode Reader SDK遵循類似的模式，需要DirectShow.NET支撐來存取攝像頭。

IronBarcode則切除這種複雜性。條碼掃描邏輯完全存在於BarcodeReader.Read中，其接受Bitmap、byte陣列、文件路徑或Stream。無需建立捕獲圖，無需對框架捕獲進行物件發送者和EventArgs e事件接線，只需交給它圖像資料即可獲取條碼資訊。這意味著需要編寫的程式碼減少，需維護的依賴項減少，更多的時間可用於您程式中真正重要的功能。

對於在.NET Core、.NET Framework或.NET 8+上進行開發的團隊，IronBarcode在Windows、macOS、Linux、Docker、Azure和AWS上提供了一致的跨平台支持。探索完整的功能集或者瀏覽其他程式碼範例以了解其他可能性。