在图像上执行 Optical Character Recognition (OCR) 是一项复杂的任务。本主题逐步说明如何在 C# 中快速轻松地从图像中提取文本。通过使用 Aspose.OCR for .NET，您可以通过几个步骤在 C# 中简单地从图像中读取字符。
在 C# 中从图像中提取文本的步骤
- 使用 Aspose.OCR for .NET NuGet 包
- 首先包含 Aspose.OCR namespace 引用
- 使用 SetLicense 方法申请 Aspose 许可证
- 创建 AsposeOcr Class 实例的对象
- 通过应用 OCR 使用 RecognizeImage 方法从图像中提取文本
- 使用 FileStream 和 StreamWriter 类将提取的文本保存到文本文件
上面的步骤向您展示了在 C# 中从图像中读取字符非常容易。上述步骤的代码如下所示。
在 C# 中从图像中提取文本的代码
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| using System; | |
| using System.IO; | |
| //Add Aspose.OCR for .NET package reference | |
| //Use following namespaces to Extract Text from Image | |
| using Aspose.OCR; | |
| namespace ExtractTextFromImage | |
| { | |
| class Program | |
| { | |
| static void Main(string[] args) | |
| { | |
| //Set Aspose license before extracting text from image | |
| //using Aspose.OCR for .NET | |
| Aspose.OCR.License AsposeOCRLicense = new Aspose.OCR.License(); | |
| AsposeOCRLicense.SetLicense(@"c:\asposelicense\license.lic"); | |
| //Create an instance of AsposeOcr class before you can apply | |
| //OCR on an image to extract the text from it | |
| AsposeOcr ExtractTextFromImage = new AsposeOcr(); | |
| //Read image using RecognizeImage method on which OCR need to be applied for text extraction | |
| string TextExtractedFromImage = ExtractTextFromImage.RecognizeImage("ExampleOCRImageToExtractText.jpg"); | |
| //Save extracted text to a text file using File Stream and StreamWriter | |
| //classes of System.IO | |
| FileStream FStream = new FileStream("ExtractTextFromImageUsingOCR.txt", FileMode.Create); | |
| StreamWriter SWriter = new StreamWriter(FStream); | |
| //Write extracted text to the file | |
| SWriter.WriteLine(TextExtractedFromImage); | |
| SWriter.Flush(); | |
| //Close FileStream and StreamWriter bojects | |
| SWriter.Close(); | |
| FStream.Close(); | |
| } | |
| } | |
| } |
如果您使用 C# 语言，则该方法对于任何类型的 .NET 应用程序都是相同的。无论您是想从图像中提取所有文本，还是从图像中逐行读取文本，Aspose.OCR for .NET 都可以帮助您做到这一点。
