Daniel Reetz, the founder of the DIY Book Scanner community, has recently started making videos of prototyping and shop tips. If you are tinkering with a book scanner (or any other project) in your home shop, these tips will come in handy. https://www.youtube.com/channel/UCn0gq8 ... g_8K1nfInQ

Search found 10 matches

by johnwmcc
12 Sep 2016, 18:19
Forum: HELP
Topic: How should I create OCR text from existing DJVU image-only file and make a searchable text layer in the DJVU file?
Replies: 20
Views: 8562

Re: How should I create OCR text from existing DJVU image-only file and make a searchable text layer in the DJVU file?

Thank you for your advice, and your trial conversions. I didn't scan the book myself, but was given the DJVU scanned image file by someone who'd already scanned it. Like you I now think it was probably scanned at 300dpi, but somehow other apps (particularly DJView and Mac Preview) see it as 72dpi, w...
by johnwmcc
11 Sep 2016, 06:24
Forum: HELP
Topic: How should I create OCR text from existing DJVU image-only file and make a searchable text layer in the DJVU file?
Replies: 20
Views: 8562

Re: How should I create OCR text from existing DJVU image-only file and make a searchable text layer in the DJVU file?

Have just downloaded free trial of Infix. It took in your PDF, but seems not to resize it - I changed page size to A4, and told it to reduce contents in proportion, but the saved version seems no different in file size. The book feels large and heavy in the hand, but I've just measured the pages, an...
by johnwmcc
11 Sep 2016, 05:31
Forum: HELP
Topic: How should I create OCR text from existing DJVU image-only file and make a searchable text layer in the DJVU file?
Replies: 20
Views: 8562

Re: How should I create OCR text from existing DJVU image-only file and make a searchable text layer in the DJVU file?

Thanks again. Infix looks pricey to buy ($159), and I don't have much need for it otherwise. Do you know of any other program for Windows or Mac, or online service that would let me change the image size in the pdf? My version of OmniPage won't load either your PDF or the other one I tried that prod...
by johnwmcc
11 Sep 2016, 04:51
Forum: HELP
Topic: How should I create OCR text from existing DJVU image-only file and make a searchable text layer in the DJVU file?
Replies: 20
Views: 8562

Re: How should I create OCR text from existing DJVU image-only file and make a searchable text layer in the DJVU file?

Thank you for that.It has produced a searchable PDF. The file is a bit big - around ten times the size of the DJVU file - are the images in it still rather larger than necessary? Which online service did you find that would convert DJVU to PDF? I have tried several, which produce different PDF file ...
by johnwmcc
10 Sep 2016, 17:27
Forum: HELP
Topic: How should I create OCR text from existing DJVU image-only file and make a searchable text layer in the DJVU file?
Replies: 20
Views: 8562

Re: How should I create OCR text from existing DJVU image-only file and make a searchable text layer in the DJVU file?

Very frustrating: I now find that the TIFF file I've generated can't be read by OmniPage 15, because the image size is too large - around 2500-2600px x 1300-1400. And it won't see a file with a .tiff extension, only .tif - another hiccup it took me a while to work out. And when I try to use the Mac ...
by johnwmcc
10 Sep 2016, 06:38
Forum: HELP
Topic: How should I create OCR text from existing DJVU image-only file and make a searchable text layer in the DJVU file?
Replies: 20
Views: 8562

Re: How should I create OCR text from existing DJVU image-only file and make a searchable text layer in the DJVU file?

Using the DJView program, I have extracted a short (ten page) chapter 4 from the book, and saved it as DJVU, file size 299KB. I have also Exported it as a TIF Document (I'm guessing that means multi-page TIF) size 679KB using the following settings in the Export dialogue: Screen Shot 2016-09-10 at 1...
by johnwmcc
07 Sep 2016, 05:16
Forum: HELP
Topic: How should I create OCR text from existing DJVU image-only file and make a searchable text layer in the DJVU file?
Replies: 20
Views: 8562

Re: How should I create OCR text from existing DJVU image-only file and make a searchable text layer in the DJVU file?

Thanks to all of you. I have found that I can export just the Glossary pages (for trial on a small number of pages) as a multipage TIFF file with page images, and get OmniPage to recognise them and output as a Word or RTF file. Needs quite a lot of work to clean up the recognition, though. Tried exp...
by johnwmcc
05 Sep 2016, 19:28
Forum: HELP
Topic: How should I create OCR text from existing DJVU image-only file and make a searchable text layer in the DJVU file?
Replies: 20
Views: 8562

Re: How should I create OCR text from existing DJVU image-only file and make a searchable text layer in the DJVU file?

Thanks for the suggestions, and for taking the trouble to reply. I appreciate it. I already use Calibre, and have the latest version. Unfortunately, its Editor can't handle DJVU files, though Calibre itself can view them using DJView (but not with the built in viewer). I tried converting the 20MB DJ...
by johnwmcc
05 Sep 2016, 12:49
Forum: HELP
Topic: How should I create OCR text from existing DJVU image-only file and make a searchable text layer in the DJVU file?
Replies: 20
Views: 8562

How should I create OCR text from existing DJVU image-only file and make a searchable text layer in the DJVU file?

I own a printed copy of the classic Ashley Book of Knots by Clifford Ashley, originally published in 1944, then (in the edition I have) reprinted with corrections in 1963 or thereabouts. I love browsing it, but it is big and very heavy, and as I get older, hard to handle. So I'd like to make an eBoo...