This packages the tesseract very nicely:
https://kebekus.gitlab.io/scantools/
Make SURE to select the correct OCR language
Tesseract OCR
11–20 of 66 posts
Re: Tesseract OCR
#12Wish there was an up to date, complete guide for training fonts.
I use it for digits and single digits, and it is not 100% accurate even if the image is best quality and I preprocess it well,
Re: Tesseract OCR
#13Make sure you have black text on white background, it turns me crazy after upgrading from 3.0 to 5.0,
Re: Tesseract OCR
#14I didn't know that google had stopped maintaining it. Interesting.
Re: Tesseract OCR
#15> Tesseract was originally developed at Hewlett-Packard Laboratories Bristol and at Hewlett-Packard Co, Greeley Colorado between 1985 and 1994, with some more changes made in 1996 to port to Windows, and some C++izing in 1998. In 2005 Tesseract was open sourced by HP. From 2006 until November 2018 it was developed by Google. I have used Tesseract for OCRing scanned books and it was great. I had no idea it was so old,…
I have permission to publish an ebook edition of an out of print history of Portland, Oregon. I haven’t found the time to work on the project. One point of friction has been selecting an OCR workflow. Any chance you would share what you’ve been successful with?
My company uses it on documents with typed and hand written text successfully.
Re: Tesseract OCR
#16I tried to use this library to process nutrition labels for a fitness app. Sometimes took 40 seconds to process, which is unacceptable for a phone app. I remember seeing a video where a google product used a neural net and resolved the same info in 1 sec or so.
How much info are you talking about? A hundred or so words or thousands?
Re: Tesseract OCR
#17I must’ve done things spectacularly wrong cuz the two times I’ve tried tesseract (second time to recognize factory printed 8 inch tall letters on a trash can), I got 0% accuracy. 0%. Not even close. So I gave up.
Re: Tesseract OCR
#18I must’ve done things spectacularly wrong cuz the two times I’ve tried tesseract (second time to recognize factory printed 8 inch tall letters on a trash can), I got 0% accuracy. 0%. Not even close. So I gave up.
Yeah tesseract is more like the bit that would sit in the middle of an ocr solution than a complete solution. But it’s all we’ve got for free at the moment.
You pretty much need black text on white background at 300-600 dpi. (Not sure the exact size but I’ve had crappy scans do better by scaling the file.)
I’ve had reasonable success with photos of printed pages run through text cleaner.
Re: Tesseract OCR
#19I must’ve done things spectacularly wrong cuz the two times I’ve tried tesseract (second time to recognize factory printed 8 inch tall letters on a trash can), I got 0% accuracy. 0%. Not even close. So I gave up.
I also failed at using this. I think it needs training data and the default set leaves a lot to be desired. There are also hundreds of options which makes it difficult to wrap your head around. I was reading from screenshots, black English text on white background with a TrueType font. Never worked.
I hacked something together with "Capture2Text". Basically taking the screenshot, saving to jpg, shelling to the exe and getting the text back. Works pretty good.
Re: Tesseract OCR
#20I must’ve done things spectacularly wrong cuz the two times I’ve tried tesseract (second time to recognize factory printed 8 inch tall letters on a trash can), I got 0% accuracy. 0%. Not even close. So I gave up.
I tried it a couple of years ago on some Japanese receipts and it couldn't handle the mix of Japanese and English words/characters. Perhaps it was the way I set things up but the result was that of failure.