Adding searchable capabilities to PDF

Hello,

I need to take one PDF that holds single image per page (coming from scanning team) and add searchable capabilities. I know it could be done by OCR pdf files and adding hidden text layer with OCR results.

Is it possible to add searchable capabilities to existing pdfs that holds single image per page using .OCR for .NET?

Could it be done in one step using .OCR and/or .PDF products or it's needed to make many transforms outside these components?

Thank you in advance.

Best regards.