PDF text extraction from given coordinates

Question

I would like to extract text from a portion (using coordinates) of PDF using Ghostscript.

Can anyone help me out?

Answer 1

I'm not sure GhostScript can accept coordinates, but you can convert the PDF to a image and send it to an OCR engine either as a subimage cropped from the given coordinates or as the whole image along with the coordinates. Some OCR API accepts a rectangle parameter to narrow the region for OCR.

Look at VietOCR for a working example, which uses Tesseract as its OCR engine and GhostScript as PDF-to-image converter.