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Aspose.OCR for .NET
OCR

Get areas with text coordinates in C#

Automatically find the coordinates of image regions containing text paragraphs using Aspose.OCR for .NET library.

 

Aspose.OCR for .NET Aspose.OCR for .NET

Overview

How to get text areas coordinates using C#

To get bounding boxes of all paragraphs in images, provided in OcrInput object, use Aspose.OCR.AsposeOcr.DetectRectangles method. Specify Aspose.OCR.AreasType.PARAGRAPHS as the areasType parameter of the method. detectAreas parameter of the method is ignored.

To run the examples, you just need to download the Aspose.OCR tools with the following links:

Command line tools

GetAreasWithTextCoordinates project



Run program in Command Prompt


  GetAreasWithTextCoordinates

or

Run program in Command Prompt if you want to use own image (document)


  GetAreasWithTextCoordinates folder/image.png




Recognition result

PropertyTypeDescription
RectanglesListCoordinates of each paragraph of an image (top-left corner, width and height), returned as a list of Rectangle objects.
ImageIndex   intSequence number of the image on the page. When working with single-page images, this value is always 0.
PageintPage number. When working with single-page images, this value is always 0.
Sourcestring   The full path of the source file. If the file is provided as a MemoryStream object, an array of pixels, or a Base64 string, this value will be empty.


This sample code shows how to get areas coordinates


  // Set the license file
  //License lic = new License();
  //lic.SetLicense("Aspose.Total.lic");

  // Create AsposeOcr instance.
  // You can use the overloaded constructor to set characters restriction.
  AsposeOcr api = new AsposeOcr();

  // Create OcrInput object to containerize images
  OcrInput input = new OcrInput(InputType.SingleImage);
  input.Add(fileName);

  // set
  // 1) the full path to the image
  // 2) type of areas to search
  // 3) set this to true for AreasType.LINES if you want to split lines after defining paragraphs     
  List<RectangleOutput> result = api.DetectRectangles(input, AreasType.PARAGRAPHS, detectAreas: true);

  Console.WriteLine("AREAS RECTANGLES COORDINATES:");
  Console.WriteLine("RESULT");
  Console.ResetColor();
  Console.WriteLine("------------------------------------------------------------------------------");

  // Print the result
  for (int i = 0; i < result.Count; i++)
  {
      Console.WriteLine(result[i].Source);
      foreach(Rectangle rect in result[i].Rectangles)
      Console.WriteLine($"X: {rect.X} Y: {rect.Y} Width: {rect.Width} Height: {rect.Height}");    
  }

Other Supported Tools

Using C#, one can easily run our examples.

Recognize image (GIF, PNG, JPEG, BMP, TIFF, JFIF)
Recognize PDF (Scanned PDF)
Recognize TIFF (Multipage TIFF)
Preprocess image (GIF, PNG, JPEG, BMP, TIFF, JFIF)
Recognize ZIP archive (ZIP)
Get JSON (GIF, PNG, JPEG, BMP, TIFF, JFIF)
Get XLSX (GIF, PNG, JPEG, BMP, TIFF, JFIF)
Detect angle (GIF, PNG, JPEG, BMP, TIFF, JFIF)
Recognize image from URL (URL with GIF, PNG, JPEG, BMP, TIFF, JFIF)
Text areas detection (GIF, PNG, JPEG, BMP, TIFF, JFIF)