We have done several posts that uses the LEADTOOLS Document Converter to convert and merge multiple images and documents, including PDF. However, if all you need is to merge multiple PDF files into a single PDF file, LEADTOOLS has a PDFFile class that can combine PDF files with one-line of code.

The PDFFile class is available for .NET FX, .NET Core, and Java. In addition to PDF file merge, the PDFFile class provides much more including getting information about the file, getting PDF metadata, encrypting and decrypting PDFs, distilling PostScript to PDF, digital signing, bookmarking, annotating, and web optimizing.

We recently posted “Convert PDF to TXT in C#, VB, and Java” that uses the LEADTOOLS Document Converter class. Now, we are going to go the other way around and convert TXT to PDF. The main difference is that conversion from text to PDF is less complicated because the source TXT file is always text based. On the other hand, PDF files can be text or image based. Converting an image to text requires OCR. Converting Text to PDF does not matter if the resulting PDF is image- or text-based.

We take great pride in the fact that LEADTOOLS is truly a comprehensive imaging SDK. We developed LEADTOOLS with the mindset that we want it to be a one-stop-shop for imaging. There are many applications, especially in the document imaging world, where technologies intersect and you may find the need to piecemeal multiple SDKs together. For example, Scanning + Document Cleanup + OCR, OMR + Forms Recognition + OCR, or OCR + PDF. How about something a little less common, like OCR + Barcode?

This video showcases how you can use the LEADTOOLS .NET Core libraries to build a cross-platform OCR Application. This sample application loads a sample image such as a TIF, performs OCR on the text, and outputs the recognized words into a PDF document.

For the source code for this project please visit our support forum: http://bit.ly/NETCoreOCR