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What are the major differences between Tesseract 3 and Tesseract 4 ? And why should I choose one over the other ?
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Tesseract is an open source text recognition (OCR) Engine, available under the Apache 2.0 license. Major version 5 is the current stable version and started with release 5.0. 0 on November 30, 2021.
The "get_tesseract_version" function returns the Tesseract version installed in the system.
Steps: -Build a static executable (self-contained) tesseract.exe compatible with Windows. If you have any language data files, make sure those are compatible with your version of tesseract and update them if necessary as well. -Check Tesseract engine setting under System settings on the application server.
Tesseract OCR Library pros are trainedlanguage models (>192), different kinds of recognition (image as word, text block, vertical text), easy to setup. 3rd party wrapper from github was used as Tesseract OCR was written on C++.
Tesseract 4.0's accuracy is better than a tesseract 3. Tesseract 4 uses deep learning model: Long Short-Term Memory (LSTM) neural network which is a kind of Recurrent Neural Network (RNN).
But please check system requirements e.g. If you are using Ubuntu 16.04 LTS then Tesseract will be installed with version 3 and not 4. And if you are using Ubuntu 18.04 then you can install latest Tesseract version 4.
For more details please refer the following articles:
Here short theory for tesseract is given: https://limitlessdatascience.wordpress.com/2019/07/01/tesseract-4-0-intro-installation/
Tesseract 3 Vs 4 output comparision: https://limitlessdatascience.wordpress.com/2019/07/31/tesseract-3-0-and-4-0-implementation-and-output-comparison/
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