scantailor-universal
OCRmyPDF
scantailor-universal | OCRmyPDF | |
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12 | 77 | |
170 | 12,134 | |
- | 2.7% | |
4.1 | 9.5 | |
9 months ago | about 18 hours ago | |
C++ | Python | |
GNU General Public License v3.0 or later | Mozilla Public License 2.0 |
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scantailor-universal
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Looking for a website or tool that can enhance contrast and darken PDFs (like the magic effect of camscanner)
You could try ScanTailor: https://scantailor.org/
- Σκανάρισμα πανεπιστημιακών συγγραμμάτων
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Z-Library to Let Users Share Physical Books
There's also https://scantailor.org/ (and a maintained fork at https://github.com/4lex4/scantailor-advanced ) which semi-automates unwarping and other corrective tasks in scanned books.
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Is there a way to convert "photographed text" in to just "text" in a .pdf file?
Scantailor (https://scantailor.org) is the tool for self-scanned books that exist in images (png, jpg, etc). However, I usually use Irfanview with PDF plugin (https://irfanview.com - download both Irfanview and the Plugins from this home page) I have elsewhere in r/PDF shown how you can do batch splitting of two-page scans, clean up muddy pages (yellowed or browned) . In the Reddit search box, search for Irfanview in this subreddit. Irfanview has lots of commands, so the instructions are very specific, and which I did trial and error on before posting. This is because Irfanview is an image processor and viewer, and PDF transformations are recent to the last couple of years. Note that you will want to run OCR after Irfanview processing, as Irfanview treats PDFs as images (which is what you have now).
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Is anyone backing up/reploading Archive.org's scanned books to Libgen, etc.?
Scantailor https://scantailor.org/ might be useful.
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Where do you BUY your ebooks from?
scantailor is a good open source option that has a lot of features centered towards this process.
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OCRmyPDF: Add an OCR text layer to scanned PDF file
I use OCRmyPDF on a regular basis to OCR journal articles my library sends me.
I've found it works great on English but (with appropriate language packs installed) works poorly on Greek and Hebrew. It also makes no effort to understand the layout of pages (e.g., tables).
The project is fantastic, though. I've often considered building a web frontend that cleans up PDFs and then OCRs them using OCRmyPDF.
For cleaning, check out https://scantailor.org/
- FOSS bottle label scanner
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Tutorial on book digitization
Next is the cleanup. Scan Tailor is the best game in town for this, but it's a dead project. Instead, there are two forks that have picked up where the original developers left off. Scan Tailor Advanced is my current fork of choice, though Scan Tailor Universal tries to add new usability features. For whatever reason, only Advanced makes full use of my CPU, so it's several times faster than Universal for the time being.
- DIY Book Scanner
OCRmyPDF
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TextSnatcher: Copy text from images, for the Linux Desktop
Try https://github.com/ocrmypdf/OCRmyPDF - it uses Tesseract behind the scenes and it absolutely brilliant.
- FLaNK Stack Weekly 19 Feb 2024
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Calibre – New in Calibre 7.0
I recommend running any such PDFs through OCRmyPDF.
https://github.com/ocrmypdf/OCRmyPDF
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A better document viewer
If by "like a photocopy" you mean the file contains images of text rather than text, the MacOS viewer presumably does OCR on the images. I don't know if there's a Linux document viewer with that capability built-in, but a quick search turned up the standalone tool OCRmyPDF.
- Gibts ein (CLI) tool, das Kontrast und Helligkeit von gescannten Textdokumenten dynamisch anpasst?
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OCR for a full pdf on Neoreader
For anyone interested I solved the problem by first ocr files through the free and open source software ocrmypdf avaible here
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ELI5: why is PDF such a widespread text format, instead of a format that's actually easier to edit?
ocrmypdf is nice for stuff like that.
- Donut: OCR-Free Document Understanding Transformer
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massive crop and OCR newspaper
Use imagemagick to convert them to PDF and ocrmypdf to straighten and OCR. See this explanation.
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OCR pdf and just keep the OCR text
Fair enough, maybe this might work for you, it should seperate the text from image anyway and if you have Adobe acrobat it should be able delete the background too with the edit function. It may already be able to do that if you haven't tried it
What are some alternatives?
scantailor-advanced - ScanTailor Advanced is the version that merges the features of the ScanTailor Featured and ScanTailor Enhanced versions, brings new ones and fixes.
PaddleOCR - Awesome multilingual OCR toolkits based on PaddlePaddle (practical ultra lightweight OCR system, support 80+ languages recognition, provide data annotation and synthesis tools, support training and deployment among server, mobile, embedded and IoT devices)
bookscan - Documentation and scripts for book scanning using free software tools
pdfplumber - Plumb a PDF for detailed information about each char, rectangle, line, et cetera — and easily extract text and tables.
OpenCV - Open Source Computer Vision Library
tesserocr - A Python wrapper for the tesseract-ocr API
rtabmap - RTAB-Map library and standalone application
Paperless-ng - A supercharged version of paperless: scan, index and archive all your physical documents
docus - Android application for scanning and managing documents.
invoice2data - Extract structured data from PDF invoices
pi-scan - Pi Scan is a simple, robust capture appliance for book scanners. It runs on a Raspberry Pi 2.
pdfminer.six - Community maintained fork of pdfminer - we fathom PDF