How can I import a table from a scanned image (jpg/pdf) file to a spreadsheet?
Example scan is here
I wouldn't even bother trying to do this - it would be quicker to recreate the table in Word, Excel or Publisher, or a similar open-source package. I think you would need specialist software to recover the original table from the image, and in my experience the results are always not good enough, so you spend as much time tweaking as you would have recreating the whole thing from scratch.
Of course this does depend on what software you have access to, and your skills. Sorry if this seems unhelpful, but I would just bite the bullet.
There is good software to do this:
Able2Abstract, PDF2XL
Both work
Last Able2abstract ajusts tables of scanned pages right even when pages border are different.
Captricity Specializes in converting forms and tables to a .csv spreadsheet. Visit their OCR Software page.