AWS OCR与Azure OCR（OCR功能比较）

// Import necessary AWS Textract and other AWS SDK packages
using Amazon.Textract;
using Amazon.Textract.Model;
using Amazon;

public async Task DetectTextFromDocumentAsync(string bucketName, string documentName)
{
    // Create an Amazon Textract client
    var textractClient = new AmazonTextractClient(RegionEndpoint.USEast1);

    // Prepare the request with the document location in S3
    var request = new DetectDocumentTextRequest
    {
        Document = new Document
        {
            S3Object = new S3Object
            {
                Bucket = bucketName,
                Name = documentName
            }
        }
    };

    // Send request to Textract and await response
    var response = await textractClient.DetectDocumentTextAsync(request);

    // Iterate through the detected blocks of text and print them
    foreach (var block in response.Blocks)
    {
        if (block.BlockType == BlockType.LINE)
        {
            Console.WriteLine($"Detected text: {block.Text}");
        }
    }
}

' Import necessary AWS Textract and other AWS SDK packages
Imports Amazon.Textract
Imports Amazon.Textract.Model
Imports Amazon

Public Async Function DetectTextFromDocumentAsync(ByVal bucketName As String, ByVal documentName As String) As Task
	' Create an Amazon Textract client
	Dim textractClient = New AmazonTextractClient(RegionEndpoint.USEast1)

	' Prepare the request with the document location in S3
	Dim request = New DetectDocumentTextRequest With {
		.Document = New Document With {
			.S3Object = New S3Object With {
				.Bucket = bucketName,
				.Name = documentName
			}
		}
	}

	' Send request to Textract and await response
	Dim response = Await textractClient.DetectDocumentTextAsync(request)

	' Iterate through the detected blocks of text and print them
	For Each block In response.Blocks
		If block.BlockType = BlockType.LINE Then
			Console.WriteLine($"Detected text: {block.Text}")
		End If
	Next block
End Function

// Import necessary Azure Cognitive Services packages
using Microsoft.Azure.CognitiveServices.Vision.ComputerVision;
using Microsoft.Azure.CognitiveServices.Vision.ComputerVision.Models;
using System.IO;
using System.Threading.Tasks;

public async Task RecognizeTextInImageAsync(Stream imageStream, string endpoint, string apiKey)
{
    // Create a Computer Vision client
    var client = new ComputerVisionClient(new ApiKeyServiceClientCredentials(apiKey))
    {
        Endpoint = endpoint
    };

    // Call the API with the image stream and read printed text
    var ocrResult = await client.RecognizePrintedTextInStreamAsync(true, imageStream);

    // Iterate over the OCR result regions, lines, and words, printing them
    foreach (var region in ocrResult.Regions)
    {
        foreach (var line in region.Lines)
        {
            foreach (var word in line.Words)
            {
                Console.WriteLine(word.Text);
            }
        }
    }
}

' Import necessary Azure Cognitive Services packages
Imports Microsoft.Azure.CognitiveServices.Vision.ComputerVision
Imports Microsoft.Azure.CognitiveServices.Vision.ComputerVision.Models
Imports System.IO
Imports System.Threading.Tasks

Public Async Function RecognizeTextInImageAsync(ByVal imageStream As Stream, ByVal endpoint As String, ByVal apiKey As String) As Task
	' Create a Computer Vision client
	Dim client = New ComputerVisionClient(New ApiKeyServiceClientCredentials(apiKey)) With {.Endpoint = endpoint}

	' Call the API with the image stream and read printed text
	Dim ocrResult = Await client.RecognizePrintedTextInStreamAsync(True, imageStream)

	' Iterate over the OCR result regions, lines, and words, printing them
	For Each region In ocrResult.Regions
		For Each line In region.Lines
			For Each word In line.Words
				Console.WriteLine(word.Text)
			Next word
		Next line
	Next region
End Function

// Import IronOcr namespace
using IronOcr;

public class OCRDemo
{
    public void PerformOCR(string imagePath)
    {
        // Create a new instance of IronTesseract
        var ocr = new IronTesseract();

        // Create a new IronOCR image input from the specified image filepath
        using var input = new OcrInput(imagePath);

        // Setting the OCR language (for example, English)
        ocr.Language = OcrLanguage.English;

        // Reads the text from the provided OcrImageInput object and returns an OcrResult object containing the extracted text
        OcrResult result = ocr.Read(input);

        // Writing all of the text to a new text file and saving it
        File.WriteAllText("result.txt", result.Text);
    }
}

' Import IronOcr namespace
Imports IronOcr

Public Class OCRDemo
	Public Sub PerformOCR(ByVal imagePath As String)
		' Create a new instance of IronTesseract
		Dim ocr = New IronTesseract()

		' Create a new IronOCR image input from the specified image filepath
		Dim input = New OcrInput(imagePath)

		' Setting the OCR language (for example, English)
		ocr.Language = OcrLanguage.English

		' Reads the text from the provided OcrImageInput object and returns an OcrResult object containing the extracted text
		Dim result As OcrResult = ocr.Read(input)

		' Writing all of the text to a new text file and saving it
		File.WriteAllText("result.txt", result.Text)
	End Sub
End Class