Pdfsandwich • Hacker News Board

Re: Pdfsandwich

#21

Post by SturgeonsLaw » Sat, Nov 06, 2021, 3:24 AM UTC

Syzygies wrote: post #7

Not to get all technical, but the "Cube Rule of Food" would classify this project as "pdftoast", not "pdfsandwich": https://cuberule.com/

> Salad

> Popular examples

> Steak

I love it

Re: Pdfsandwich

#22

Post by cyounkins » Sat, Nov 06, 2021, 3:28 AM UTC

Years ago I tried tesseract and similar tools to do this but switched to using ABBYY FineReader because the OCR accuracy was way higher and into "usable". Can anyone offer a recent comparison?

Re: Pdfsandwich

#23

Post by Shared404 » Sat, Nov 06, 2021, 3:29 AM UTC

kingcharles wrote: post #8

bonyt wrote: post #6

Interesting. I've used ocrmypdf for this a lot - https://ocrmypdf.readthedocs.io/en/latest/

Looks great.. I'm just trying to find the Windows binary?

And people say Linux doesn't have any programs :P

Re: Pdfsandwich

#24

Post by kingcharles » Sat, Nov 06, 2021, 3:35 AM UTC

jck wrote: post #19

kingcharles wrote: post #8

Earlier quoted context omitted.

Looks great.. I'm just trying to find the Windows binary?

Maybe use their docker image? https://ocrmypdf.readthedocs.io/en/latest/docker.html

This Docker app looks useful, thank you.

Re: Pdfsandwich

#25

Post by ce4 » Sat, Nov 06, 2021, 3:43 AM UTC

I am using scantools:

https://kebekus.gitlab.io/scantools/image2pdf/

Also worth a look, works great and also supports PDF/A and jbig for a nice compression of b/w scans

Re: Pdfsandwich

#26

Post by marttt » Sat, Nov 06, 2021, 3:59 AM UTC

I've been a fan of k2pdfopt [1] for years. Single binary, command line + optional gui. Lets you slice and optimize pdfs in any imaginable way, e.g. for e-readers' screens. I think it also does what pdfsandwich does, if I understand things correctly [2].

That said, pdfsandwich's 'one thing well' approach does have an appeal. I will definitely try it out, thanks for posting. Something in its "logo" reminded me of the OpenBSD fish. :)

1: https://www.willus.com/k2pdfopt/

2: https://www.willus.com/k2pdfopt/help/ocr.shtml

Re: Pdfsandwich

#27

Post by the_pwner224 » Sat, Nov 06, 2021, 4:03 AM UTC

Syzygies wrote: post #7

Not to get all technical, but the "Cube Rule of Food" would classify this project as "pdftoast", not "pdfsandwich": https://cuberule.com/

I'd classify it more as a salad. https://saladtheory.github.io/ (some very interesting content there, and includes a section refuting the cube rule)

Re: Pdfsandwich

#28

Post by convolutionart » Sat, Nov 06, 2021, 4:40 AM UTC

Adobe Acrobat X Pro is excellent in this regard, but propietary and all that

Re: Pdfsandwich

#29

Post by 2Gkashmiri » Sat, Nov 06, 2021, 5:10 AM UTC

i have used this extensively and i love this software. you just supply a file and it crunches the numbers and you get an output.

there is something called scantailor if you are scanning books yourself. that gives you more contrl over the orientation and margins and ocr and contrast controls. that said, pdfsandwich gives you a miniscule file size which i could not achieve otherwise.

Re: Pdfsandwich

#30

Post by 2Gkashmiri » Sat, Nov 06, 2021, 5:25 AM UTC

i have a question about OCR. is there a project that lets you define fields for doing ocr, i am thinking scanning invoices and defining that this line means the invoice number, this here means the item name, item rate, etc.

many OCR software can scan this but not "understand" it to use it. ABBYY has something like this for scanning invoices so is there something for the foss folks?