19
I have successfully used Tesseract for Optical Character Recognition, on Ubuntu.
It is free, open source and maintained by Google.
While not bad with Latin characters and numbers, it struggles with Japanese characters for instance. You might have to first feed it training data depending on what you want to get recognized.
It can read from a lot of ...
19
A tool that lets you do that is PDF-XChange Viewer. The free version will allow you to OCR your document in a variety of languages (you can download additional language packs for free) and add the OCR'd text as an overlay text layer you can copy from and search with CTRL+F.
fast PDF viewer with a lot of features
fast OCR engine (unless you choose the best ...
19
Try pdfsandwich. From the man-page:
pdfsandwich generates "sandwich" OCR pdf files, i.e. pdf files which
contain only images (no text) will be processed by optical character
recognition (OCR) and the text will be added to each page invisibly
"behind" the images.
pdfsandwich is a command line utility. If you have a scanned pdf file,
for ...
12
The newer version of Tesseract (3.03 RC at the time of writing this) can do this:
free, opensource and cross-plarform
starting from version 3.03 PDF output is available
CLI software
multiple languages support
unfortunately, single image input, so to make a complete document, one must create a batch script to convert each page image to searchable PDF. After ...
10
I use OCRfeeder for this. It is free, open-source and runs on Linux (unfortunately there is no pre-compiled executable for OSX, though you might be able to build it from source). By default it runs on the Tesseract engine, although this can be changed.
Screenshots (click them for larger pictures)
I don't have a lot of experience with anything other ...
8
pypdfocr is what worked for me. It is a Python script streamlining the whole Tesseract usage. After getting dependencies installed (on Linux it's a much simpler process) it's as simple as typing:
pypdfocr myfile.pdf
And opening myfile_ocr.pdf a while later.
6
I use iAnnotate and I love it. It costs $9.99 on the Apple iTunes App Store. PDFs that are already OCR'd can be highlighted and whatnot using the software, and searching them is simple. There are also a lot of other helpful tools like highlighting and the ability to add notes (annotate).
The only negative I've found is that sometimes when I zoom in or out ...
5
Pay attention for products by ABBYY:
ABBYY Mobile OCR Engine is highly-accurate OCR SDK. It supports Android and iOS, works on device.
ABBYY Cloud OCR SDK is platform-independent OCR SDK, works in cloud.
5
There is a library for this: TesseractOCR for PHP
https://github.com/thiagoalessio/tesseract-ocr-for-php
Using Tesseract under the hood, which is probably the best open source OCR library.
It is open source, and cross-platform.
No web service, everything is done on your server.
5
You could use Capture2Text.
Free.
For Windows.
The way it works is by drawing a rectangle on the screen.
It can treat the image of videos too (I tested it playing a video with subtitles in SMPlayer).
Good OCR results for English and Spanish language, at least.
Personally is one of my favorite apps of this kind.
UPDATE:
If useful, these are the settings ...
5
I use and like PDF Xchange Viewer (now Editor, per the website). It includes OCR capability which will convert the image of text to text (for clean text). I find its annotation capabilities much easier and better to use than some of the other PDF programs. Website
The only glitch I have repeatedly had with its OCR is that it converts "fi" to a ...
5
I have found something amazing http://tabula.technology/ this is the best tool we have! It's also Free. It works really well with PDF files but even works fairly well with well formed tables like above that are images.
Awesome interface and great to use.
It is open source (MIT License) and the source code is available at https://github.com/tabulapdf/...
5
This is really two steps...
1st -- "Sheet Music" >>into>> "Data" (i.e. Music XML)
Open Source!
https://audiveris.kenai.com/
Shareware/Trials/Commercial Software:
Capella Scan
Photoscore
Sharpeye
Smartscore
List item
Note: special 'exception', PdfToMusic will 'scan' PDFs generated by music programs into MusicXML
2nd -- "Data" >>into editor>>export ...
5
The short answer - you will be better off finding a human translator.
Here is a long answer. Your task has two parts.
Convert handwritten Russian into a computer text in Russian.
Translate text from Russian to English.
The second step is relatively easy. A half decent translation can be done with Google Translate.
However the first step is difficult to ...
4
Online OCR allows you to take images in JPG, JPEG, BMP, TIFF, or GIF format and turns it into a DOC, XLS, or TXT. Registration is optional. It supports up to 32 languages.
Online OCR allows you to upload a max of 4MB per picture and you can upload 15 per day.
4
Receipts
Pros:
OCR understanding receipts
Offline OCR!
low privileges requirement
Export options (Dropbox, Google Docs)
Cons:
Can not supply photo from gallery (have to make new each time)
Couldn't figure out how to add all things from receipt at once, instead of one thing with every photo
A part from this , a kind of simple app.
Conclusion:
If your ...
4
I use Microsoft OneNote as OCR tool. On Right click against an image It can copy the entire text in images and It also has the capability to search text with in image. It is free and accurate and runs on windows and support almost all image formats.
It can also search through PDF files, and Images in PDF files.
Bonus point is that it supports multiple ...
4
There is a whole field of software called OCR or optical character recognition. Omnipage regular or Pro from nuance has always worked well for me. It can usually handle anything I throw at it. If recognition is poor use a higher DPI in scanning, I usually use 600, but on tiny fonts I use 1200dpi.
Omnipage cost money, but you get what you pay for.
Over ...
4
I think a good buzzword here would be "fuzzy diff".
Possible answer:
https://github.com/google/diff-match-patch
online tool to evaluate: https://neil.fraser.name/software/diff_match_patch/demos/diff.html (activate efficiency cleanup)
Technical explanations of the algorithm: https://neil.fraser.name/writing/diff/
Other possibilities and related questions:
...
4
In Bash:
for file in FILES ; do tesseract "$file" "${file%%.*}" ; done
where in place of FILES, you should write a series of file names like image456.jpeg image457.jpeg image458.jpeg, or a glob pattern like *.jpeg, or any such combination.
3
You can get searchable text using Google Drive.
First, choose a key setting. Under "general" in your Google Drive settings, check the box next "Convert uploads: Convert uploaded files to Google Docs editor format."
Now upload the pdf to your Google Drive (click "new", then "file upload"). When the upload is complete (might take a minute or two), right ...
3
https://www.microsoft.com/en-us/store/p/leadtools-ocr/9wzdncrdr0d5 is a small simple WinRT app (runs fine on Win10 as well) that does nothing more than take an image or pdf and output a sandwich PDF or text. It's kinda ugly and has absolutely no configuration, but it does this one small task perfectly.
3
Smoothscan is a tool to convert scanned text into a vectorized
output form. Because printed text is assembled from fonts, each
particular letter (like ‘o’) will have the same shape as every other
‘o’ in the document. We can take advantage of this, by building a
table of such symbols, and represent each occurrence of a symbol with
a reference to ...
3
Receipts by Wave
Wave HQ - January 3, 2014
Finance
Prons:
OCR of Receipts!
Nice UI
Exporting to Google Drive, Dropbox...
separate private and business accounting in same app
Cons:
require more privileges that such app might need to require...
need to make an account with them to try OCR as it has to send photo and they do OCR remotely
ONLY consumes ...
3
Having ImageMagick, potrace and pdftools (disclaimer: I am the author of pdftools). Assuming you have an input PDF file called input.pdf:
Convert every page in a BMP file using ImageMagick:
mkdir bmp
magick convert -density 300 input.pdf -quality 100 ./bmp/input.bmp
(optional) pre-process image files:
mkdir bmpproc
for /r %%i in (./bmp/*.bmp) do mkbitmap ...
3
queXF is an Open Source, web based paper form verification and data entry system:
It requires you to first express your paper-printed form in the queXML format.
queXF then uses this "schema" to recognize fields of the scanned image.
Not sure about the Excel format.
Free, Open source, seems well-maintained (last release 2 months ago).
3
You can use these suggested parameters to increase the accuracy of tesseract.
example usage from my jtesseract script:
tesseract "$@" -l jpn -c chop_enable=T -c use_new_state_cost=F -c segment_segcost_rating=F -c enable_new_segsearch=0 -c language_model_ngram_on=0 -c textord_force_make_prop_words=F -c edges_max_children_per_outline=40
3
If you are interested in working with a commercial product, you should check out the LEADTOOLS OCR SDK. All of the OCR would be done server side and written in just a few lines of codes:
// Initialize the OCR engine
ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Advantage,
// Startup the engine
ocrEngine.Startup(null, null, null, @"C:\LEADTOOLS ...
3
ABBYY FineReader does very good job when it comes to optical recognition. Probably the best on the market. And it can also export to *.csv, among many other formats. The downside is, it is not free and this particular version works on Windows only.
A different version for macOS exists, but it lacks many features and overall slower (subjectively) that a ...
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