How to determine and alter dpi of a PDF?

Forum|Forum|13 years ago
September 26, 2012
1 reply
143026 views

I have a 70 page PDF and would like it to be searchable, and to run OCR on it. The error message is:

Acrobat could not run Paper Capture because of the following error: This page is of unsupported resolution, so it cannot be captured. Supported resolutions are 200-600 dpi for b/w and 200-400 dpi for gray/color.

How do I determine the dots per inch (dpi) of the document and how to increase or decrease it?

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MichaelKazlow

Legend

PDF files do not have a resolution. Only images do. You should be able to find out with the Preflight tool. But you cannot fruitfully increase or decrease the dpi. You need to rescan at the proper dpi using the scanner's settings to determine what dpi you want to scan with.