Windows OCR 引擎与 Tesseract：详细比较

using System;
using System.IO;
using System.Text;
using System.Threading.Tasks;
using Windows.Graphics.Imaging;
using Windows.Media.Ocr;

class Program
{
    static async Task Main(string[] args)
    {
        // Provide the path to the image file
        string imagePath = "sample.png";
        try
        {
            // Call the ExtractText method to extract text from the image
            string extractedText = await ExtractText(imagePath);
            // Display the extracted text
            Console.WriteLine("Extracted Text:");
            Console.WriteLine(extractedText);
        }
        catch (Exception ex)
        {
            Console.WriteLine("An error occurred: " + ex.Message);
        }
    }

    public static async Task<string> ExtractText(string image)
    {
        // Initialize StringBuilder to store extracted text
        StringBuilder text = new StringBuilder();
        try
        {
            // Open the image file stream
            using (var fileStream = File.OpenRead(image))
            {
                // Create a BitmapDecoder from the image file stream
                var bmpDecoder = await BitmapDecoder.CreateAsync(fileStream.AsRandomAccessStream());
                // Get the software bitmap from the decoder
                var softwareBmp = await bmpDecoder.GetSoftwareBitmapAsync();
                // Create an OCR engine from user profile languages
                var ocrEngine = OcrEngine.TryCreateFromUserProfileLanguages();
                // Recognize text from the software bitmap
                var ocrResult = await ocrEngine.RecognizeAsync(softwareBmp);
                // Append each line of recognized text to the StringBuilder
                foreach (var line in ocrResult.Lines)
                {
                    text.AppendLine(line.Text);
                }
            }
        }
        catch (Exception ex)
        {
            Console.WriteLine("Error during OCR process: " + ex.Message);
        }
        // Return the extracted text
        return text.ToString();
    }
}

using Patagames.Ocr;

class TesseractExample
{
    static void Main(string[] args)
    {
        // Create an OCR API instance
        using (var api = OcrApi.Create())
        {
            // Initialize the OCR engine for the English language
            api.Init(Patagames.Ocr.Enums.Languages.English);
            // Extract text from the image
            string plainText = api.GetTextFromImage(@"C:\Users\buttw\source\repos\ironqr\ironqr\bin\Debug\net5.0\Iron.png");
            // Display the extracted text
            Console.WriteLine(plainText);
        }
    }
}

using IronOcr;

class IronOCRExample
{
    static void Main(string[] args)
    {
        // Create an IronTesseract instance
        var ocr = new IronTesseract();
        // Set the language for OCR recognition
        ocr.Language = OcrLanguage.English;
        // Perform OCR on the specified image
        var result = ocr.Read(@"C:\Users\buttw\source\repos\ironqr\ironqr\bin\Debug\net5.0\Iron.png");
        // Display the extracted text
        Console.WriteLine(result.Text);
    }
}