[vox-tech] How to tell if a pdf is text or image?

[hajhouse]

P=E5 2007-03-20, skrev Alex Mandel:
> Anyone know a way to tap into a pdf programmatically to tell if it =

> contains text vs was scanned as an image?
> =

> I basically just want to sort a directory with many thousands of pdfs.
> I figured there must be something in the header or in the file info that =

> either says that it's an image or it has text, or to be more complicated =

> gives you a quick percentage of document is text, which I could use to =

> set a sort threshold.
> =

> Alternately if it can be done more easily on a ps file there's no reason =

> why I can't do a pdf2ps on it and then decide how to sort.
> It's really a one time deal so I'll take the overhead on that operation.

What about converting the PDF files to postscript then running ps2ascii?

-- =

Henry House
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