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11

This is an indication of the quality of the ebook. (v5.0) should be close to retail quality: v1.x: publication has been scanned and OCR-ed, but not spell checked. v2.x: publication has been scanned, OCR-ed, and spell checked but not proofread. v3.x: publication has been scanned, OCR-ed, spell checked, and proofread. V4.x: publication has been proofread by ...


9

DjVu files are normally image only. From these file sections can be selected as images but not as text¹. If OCR was applied during, or after, the conversion to DjVu. Extra information is stored in the files that associate image areas with text. Only if that was done you can select text from such a file². Applying OCR to a DjVu file can be done online. If ...


2

Define what is: "fix it at the first place". If you want to fix wrong output from OCR analysis, a simple solution on an infinite set of TOCs you will never make. You will never apply all variations. You would have to create a machine learning algorithm that would analyze each TOC variant. Or count substrings of the same characteristics (in simple TOC). ...


1

You can also use ocrodjvu with a selected OCR engine, e.g. tesseract.


1

PDF documents embed all its fonts within the document. You can get these embedded fonts information programmatically with most PDF libraries. If there are no embedded fonts then the PDF at hand is a scanned one. If there are only one or two fonts, then the document is OCRized. If there are three or more fonts, then the document is a digital native. ...


1

What you want to accomplish is not a quick and easy task. You need to capture images of the book pages, clean the images, and depending on your desire, convert them to text, format them, and generate files in your desired format. I agree with idiotprogrammer and the others in the comments: if you can already buy an ebook version or find a (legal) free copy ...


1

It's probably not relevant to you at this point, but a service called Shelfie used to allow you to purchase heavily discounted digital versions of any physical book you already owned. You had to sign the title page and upload a photograph of it as evidence you owned it. Very clever idea and addressed a need all of us have, but unfortunately the interface ...


1

The answer really depends on your needs, time you might be willing to invest, money you might be willing to spend (for commercial software), and what you are going to do with the result (is it just for your own reading, or do you plan to distribute it). A couple of open source tools that might help you are k2pdfopt and ScanTailor. They can both clean up ...


1

It seems to be disabled when the document color mode is set to black & white rather than full color.


1

If I understand your question correctly, you are asking for a way to automatically double-check an OCR conversion from image to text. I'm afraid that is not possible: checking would require conversion from image to text via OCR, which I'm sure you can see is circular. If you want to proof an OCR conversion, you'll have to do it the old-fashioned way. At ...


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