Originally Posted by user
this is very interesting, but I cant imagine what kind of logic it has, since manipulating image will make OCR easier
perhaps, ABBY recommends this because finereader already does the manipulation by its own? but in this case, I can't see how pre-OCR manipulation can harm
as for these photos:
what improved the second/right image and made it perfectly OCR-able?
Yes, finereader does in batch: rotating, correcting resolution, straightening text lines (poor algorithm), despeckling, and of course recognition of blocks and text. On input it allows to detect image orientation, split dual pages and convert to black and white.
As for preprocessing they especially advice not to fatten or otherwise manipulate the pixels around the text.
The last question I already answered in the previous post.