HTML JPG OCR XML BMP
Aspose.OCR  for C++
Searchable PDF

Aspose.Imaging for Java

processes scanned images or even smartphone photos in PNG format and creates PNG documents containing recognized text. To add it to your project, you just need to get Aspose.OCR

Aspose Maven Repository or specify Aspose Maven Repository configuration and install it within your Maven-based project by adding the following configurations to the pom.xml. For Graddle, Ivy, Sbt examples check out our repository .

Package Manager Console Command


  PM> Install-Package Aspose.OCR.Cpp

With C++ OCR and just a few lines of code, you can create full-featured application that converts an PNG image to Searchable PDF document:

  • Create an instance of AsposeOcr class
  • Call AsposeOCR.asposeocr_page() method
  • Pass the PNG file path as parameter
  • AsposeOCR.asposeocr_page returns a String or file of Searchable PDF type

System Requirements

Before running the example, make sure that Microsoft.ML.OnnxRuntime 1.7.0 or above is added to the project. It should be automatically installed if you install Aspose.OCR via NuGet Package Manager.

  • NET Standard 2.0+ compatible solution
  • Aspose.OCR for .NET referenced in your project.


std::string img_path = "../srcSample.png";

// Prepare buffer for result (in symbols, len_byte = len * sizeof(wchar_t))
const size_t len = 4096;

wchar_t bfr[len] = { 0 };

size_t result = aspose::ocr::page(image_path.c_str(), bfr, len);

//Print result
std::wcout << bfr << L"\n";
  • PNG What is PNG File Format

    PNG, Portable Network Graphics, refers to a type of raster image file format that use loseless compression. This file format was created as a replacement of Graphics Interchange Format (GIF) and has no copyright limitations. However, PNG file format does not support animations. PNG file format supports loseless image compression that makes it popular among its users. With the passage of time, PNG has evolved as one of the mostly used image file format. Almost all Operating Systems have support for opening PNG files. For example, Microsoft Windows viewer has the capability to open PNG files as the OS has by default the support available as part of installation.

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    Searchable PDF What is Searchable PDF File Format

    Searchable PDF files retain the original scanned image for viewing, as well as OCR text in a hidden layer that can be used for full-text searches within a document or highlighting text for copy and paste operations. Full OCR conversion to PDF, not including the original image, will never retain 100% of the original formatting, especially if the document has many images or a complex layout.

    Read More

    TXT (Text Document File)
    Text (Text Document File)
    DOC (Documents generated by Microsoft Word)
    DOCX (Microsoft Word documents)
    XLS (Microsoft Excel Binary File Format)
    XLSX (Microsoft Excel documents)
    PDF (Portable Document Format (PDF))
    Searchable PDF (Searchable Portable Network Graphics )