Aspose.BarCode を使用して .NET アプリケーションで QR スキャンパフォーマンスを最適化する方法

PM> Install-Package Aspose.BarCode

var sw = Stopwatch.StartNew();
// Your scan logic
sw.Stop();
Console.WriteLine($"Elapsed: {sw.ElapsedMilliseconds} ms");

byte[] imgData = File.ReadAllBytes("qr_sample.png");
using (MemoryStream ms = new MemoryStream(imgData))
using (BarCodeReader reader = new BarCodeReader(ms, DecodeType.QR))
{
    foreach (BarCodeResult result in reader.ReadBarCodes())
    {
        // Process result
    }
}

using (BarCodeReader reader = new BarCodeReader(ms, DecodeType.QR))
{
    // Only scan for QR codes
}

string[] imageFiles = Directory.GetFiles("/qrbatch", "*.png");
Parallel.ForEach(imageFiles, file =>
{
    using (var ms = new MemoryStream(File.ReadAllBytes(file)))
    using (var reader = new BarCodeReader(ms, DecodeType.QR))
    {
        foreach (var result in reader.ReadBarCodes())
        {
            // Process result
        }
    }
});

Console.WriteLine($"Scanned {count} codes in {sw.Elapsed.TotalSeconds} seconds");

using Aspose.BarCode.BarCodeRecognition;
using System;
using System.IO;
using System.Diagnostics;
using System.Threading.Tasks;

class Program
{
    static void Main()
    {
        string[] files = Directory.GetFiles("/qrbatch", "*.png");

        var sw = Stopwatch.StartNew();

        Parallel.ForEach(files, file =>
        {
            byte[] imgData = File.ReadAllBytes(file);
            using (var ms = new MemoryStream(imgData))
            using (var reader = new BarCodeReader(ms, DecodeType.QR))
            {
                foreach (var result in reader.ReadBarCodes())
                {
                    // Process result.CodeText
                    Console.WriteLine($"File: {file}, QR Text: {result.CodeText}");
                }
            }
        });

        sw.Stop();
        Console.WriteLine($"Scanned {files.Length} images in {sw.ElapsedMilliseconds} ms");
    }
}

public async Task<IActionResult> ScanQrAsync(IFormFile uploaded)
{
    using (var ms = new MemoryStream())
    {
        await uploaded.CopyToAsync(ms);
        ms.Position = 0;
        using (BarCodeReader reader = new BarCodeReader(ms, DecodeType.QR))
        {
            foreach (var result in reader.ReadBarCodes())
            {
                // Process result.CodeText
            }
        }
    }
    return Ok();
}

// Before scanning, resize/convert/clean image using System.Drawing
Bitmap bmp = new Bitmap("input.png");
Bitmap processed = Preprocess(bmp);
using (var ms = new MemoryStream())
{
    processed.Save(ms, ImageFormat.Png);
    ms.Position = 0;
    using (BarCodeReader reader = new BarCodeReader(ms, DecodeType.QR))
    {
        // Scan
    }
}