Quote:
Originally Posted by Marinolino
You should experiment with 300 and 600 dpi downsampling, and see the quality and the conversion speed, using e.g. 30-40 sample pages from your 500 or 1000 pdf scan.
For my text books (without many pictures and graphics therein) Clearscan mode at 300 dpi is usually good enough for me, and it results in 2-4 MB pdf file per 100 pages i.e. 10-20 MB pdf for 500 page book.
I'd quickly crop double-paged scans and trim its margins using Briss or k2pdopt beforehand.
In the future, if you want even smaller and neater pdfs, you can use Scantailor before applying Clearscan OCR , to automatically crop double-paged scans, deskew and despeckle scanned images, trim the margins, remove the background etc.
https://www.youtube.com/watch?v=Edfs2_YJhx4
https://www.youtube.com/watch?v=dHZmTYTVL44 |
Thanks. I read the Adobe instructions for scanning that you linked to, and I'm still not too sure what the difference is between Clearscan and Searchable Image, other than it says Clearscan replaces the fonts with closely related ones, or something.
Yes, I think 20MB per 500 page book is good enough for me, as well. I don't need to drastically reduce the file size, otherwise I would probably just convert them to DJVU files.
What do you mean by 'double-paged' scans?