You can do the OCRing as a part of the original scanning process. You define a blank font and place the letters at the appropriate points to allow text selectio

You can do the OCRing as a part of the original scanning process. You define a blank font and place the letters at the appropriate points to allow text selection. This is also done for documents that use fonts which are not licensed for embedding, it reduces on screen rendering quality slightly as you have lost any hinting information but it’s fine with printing and reserves the intent.