如何在 C# 中使用IronOCR讀取螢幕截圖進行 OCR辨識與圖片轉文字

using IronOcr;
using System;
using System.Linq;

// Instantiate OCR engine
var ocr = new IronTesseract();

using var inputScreenshot = new OcrInput();
inputScreenshot.LoadImage("screenshotOCR.png");

// Perform OCR
OcrPhotoResult result = ocr.ReadScreenShot(inputScreenshot);

// Output screenshot information
Console.WriteLine(result.Text);
Console.WriteLine(result.TextRegions.First().Region.X);
Console.WriteLine(result.TextRegions.Last().Region.Width);
Console.WriteLine(result.Confidence);

Imports IronOcr
Imports System
Imports System.Linq

' Instantiate OCR engine
Private ocr = New IronTesseract()

Private inputScreenshot = New OcrInput()
inputScreenshot.LoadImage("screenshotOCR.png")

' Perform OCR
Dim result As OcrPhotoResult = ocr.ReadScreenShot(inputScreenshot)

' Output screenshot information
Console.WriteLine(result.Text)
Console.WriteLine(result.TextRegions.First().Region.X)
Console.WriteLine(result.TextRegions.Last().Region.Width)
Console.WriteLine(result.Confidence)

using IronOcr;
using System;

// Configure OCR engine with specific settings for screenshots
var ocr = new IronTesseract()
{
    // Set language for better accuracy with non-English content
    Language = OcrLanguage.English,
    // Configure for screen-resolution images
    Configuration = new TesseractConfiguration()
    {
        PageSegmentationMode = TesseractPageSegmentationMode.AutoOsd,
        // Enable whitelist for specific characters if needed
        WhiteListCharacters = null
    }
};

using var inputScreenshot = new OcrInput();
// Load screenshot with specific DPI setting for consistency
inputScreenshot.LoadImage("screenshotOCR.png", 96); // Standard screen DPI

// Apply preprocessing for better accuracy
inputScreenshot.DeNoise(); // Remove screenshot artifacts
inputScreenshot.Sharpen(); // Enhance text edges

// Perform OCR with error handling
try
{
    OcrPhotoResult result = ocr.ReadScreenShot(inputScreenshot);

    // Process results with confidence threshold
    if (result.Confidence > 0.8)
    {
        Console.WriteLine($"High confidence text extraction: {result.Text}");
    }
    else
    {
        Console.WriteLine("Low confidence - consider image preprocessing");
    }
}
catch (Exception ex)
{
    Console.WriteLine($"OCR Error: {ex.Message}");
}

Imports IronOcr
Imports System

' Configure OCR engine with specific settings for screenshots
Dim ocr As New IronTesseract() With {
    ' Set language for better accuracy with non-English content
    .Language = OcrLanguage.English,
    ' Configure for screen-resolution images
    .Configuration = New TesseractConfiguration() With {
        .PageSegmentationMode = TesseractPageSegmentationMode.AutoOsd,
        ' Enable whitelist for specific characters if needed
        .WhiteListCharacters = Nothing
    }
}

Using inputScreenshot As New OcrInput()
    ' Load screenshot with specific DPI setting for consistency
    inputScreenshot.LoadImage("screenshotOCR.png", 96) ' Standard screen DPI

    ' Apply preprocessing for better accuracy
    inputScreenshot.DeNoise() ' Remove screenshot artifacts
    inputScreenshot.Sharpen() ' Enhance text edges

    ' Perform OCR with error handling
    Try
        Dim result As OcrPhotoResult = ocr.ReadScreenShot(inputScreenshot)

        ' Process results with confidence threshold
        If result.Confidence > 0.8 Then
            Console.WriteLine($"High confidence text extraction: {result.Text}")
        Else
            Console.WriteLine("Low confidence - consider image preprocessing")
        End If
    Catch ex As Exception
        Console.WriteLine($"OCR Error: {ex.Message}")
    End Try
End Using

using IronOcr;
using System;
using System.Linq;

var ocr = new IronTesseract();
using var input = new OcrInput();
input.LoadImage("screenshot.png");

OcrPhotoResult result = ocr.ReadScreenShot(input);

// Process each text region individually
foreach (var region in result.TextRegions)
{
    Console.WriteLine($"Text: {region.Text}");
    Console.WriteLine($"Location: X={region.Region.X}, Y={region.Region.Y}");
    Console.WriteLine($"Size: {region.Region.Width}x{region.Region.Height}");
    Console.WriteLine($"Confidence: {region.Confidence:P2}");
    Console.WriteLine("---");
}

// Find specific UI elements by text content
var buttonRegion = result.TextRegions
    .FirstOrDefault(r => r.Text.Contains("Submit", StringComparison.OrdinalIgnoreCase));

if (buttonRegion != null)
{
    Console.WriteLine($"Found button at: {buttonRegion.Region.X}, {buttonRegion.Region.Y}");
}

Imports IronOcr
Imports System
Imports System.Linq

Dim ocr As New IronTesseract()
Using input As New OcrInput()
    input.LoadImage("screenshot.png")

    Dim result As OcrPhotoResult = ocr.ReadScreenShot(input)

    ' Process each text region individually
    For Each region In result.TextRegions
        Console.WriteLine($"Text: {region.Text}")
        Console.WriteLine($"Location: X={region.Region.X}, Y={region.Region.Y}")
        Console.WriteLine($"Size: {region.Region.Width}x{region.Region.Height}")
        Console.WriteLine($"Confidence: {region.Confidence:P2}")
        Console.WriteLine("---")
    Next

    ' Find specific UI elements by text content
    Dim buttonRegion = result.TextRegions _
        .FirstOrDefault(Function(r) r.Text.Contains("Submit", StringComparison.OrdinalIgnoreCase))

    If buttonRegion IsNot Nothing Then
        Console.WriteLine($"Found button at: {buttonRegion.Region.X}, {buttonRegion.Region.Y}")
    End If
End Using

using IronOcr;

// Configure for multiple languages
var ocr = new IronTesseract();
ocr.AddSecondaryLanguage(OcrLanguage.ChineseSimplified);
ocr.AddSecondaryLanguage(OcrLanguage.Japanese);

using var input = new OcrInput();
input.LoadImage("multilingual-screenshot.png");

// Process with language detection
OcrPhotoResult result = ocr.ReadScreenShot(input);
Console.WriteLine($"Extracted multilingual text: {result.Text}");

Imports IronOcr

' Configure for multiple languages
Dim ocr As New IronTesseract()
ocr.AddSecondaryLanguage(OcrLanguage.ChineseSimplified)
ocr.AddSecondaryLanguage(OcrLanguage.Japanese)

Using input As New OcrInput()
    input.LoadImage("multilingual-screenshot.png")

    ' Process with language detection
    Dim result As OcrPhotoResult = ocr.ReadScreenShot(input)
    Console.WriteLine($"Extracted multilingual text: {result.Text}")
End Using

using IronOcr;
using System.Collections.Generic;
using System.Threading.Tasks;

public async Task ProcessScreenshotBatchAsync(List<string> screenshotPaths)
{
    var ocr = new IronTesseract();

    // Process screenshots in parallel for better performance
    var tasks = screenshotPaths.Select(async path =>
    {
        using var input = new OcrInput();
        input.LoadImage(path);

        // Apply consistent preprocessing
        input.DeNoise();

        var result = await Task.Run(() => ocr.ReadScreenShot(input));
        return new { Path = path, Result = result };
    });

    var results = await Task.WhenAll(tasks);

    // Process results
    foreach (var item in results)
    {
        Console.WriteLine($"File: {item.Path}");
        Console.WriteLine($"Text: {item.Result.Text}");
        Console.WriteLine($"Confidence: {item.Result.Confidence:P2}");
    }
}

Imports IronOcr
Imports System.Collections.Generic
Imports System.Threading.Tasks

Public Async Function ProcessScreenshotBatchAsync(screenshotPaths As List(Of String)) As Task
    Dim ocr As New IronTesseract()

    ' Process screenshots in parallel for better performance
    Dim tasks = screenshotPaths.Select(Async Function(path)
                                           Using input As New OcrInput()
                                               input.LoadImage(path)

                                               ' Apply consistent preprocessing
                                               input.DeNoise()

                                               Dim result = Await Task.Run(Function() ocr.ReadScreenShot(input))
                                               Return New With {Key .Path = path, Key .Result = result}
                                           End Using
                                       End Function)

    Dim results = Await Task.WhenAll(tasks)

    ' Process results
    For Each item In results
        Console.WriteLine($"File: {item.Path}")
        Console.WriteLine($"Text: {item.Result.Text}")
        Console.WriteLine($"Confidence: {item.Result.Confidence:P2}")
    Next
End Function