When running Adobe Acrobat's OCR on a PDF document, which downsampling produces a higher quality: 600 dpi or 72 dpi?

Posted by Ricardo Altamirano on Super User See other posts from Super User or by Ricardo Altamirano
Published on 2012-10-18T16:06:04Z Indexed on 2012/10/18 17:06 UTC
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I have a large PDF document that consists of scanned pages of a textbook. I want to run Adobe Acrobat 9's text recognition function on it, but I'm presented with this menu when I do.

Adobe Acrobat OCR Menu

I'm confused by the options in the highlighted menu. What option will produce the highest quality/most readable text? I thought 600 dpi implies a higher quality image than 72 dpi, so I'm confused by "High (72 dpi)" and "Lowest (600 dpi)."

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