FontAwesome and Tesseract

[Jason]

I would like to be able to detect shapes like those contained in FontAwesome. Take for example a gear: (https://fontawesome.com/icons?d=gallery&q=gear) This is unicode character \uf013

I think this would be as simple as training a font, via http://trainyourtesseract.com/, but this did not work. I am not sure why it failed, but any insight on how to do this would be appreciated. I am thinking the unicode range is the issue?

Also, I would be fundamentally training characters, not words. 

Thank you.

[Jason]

Can I "bump" this? 

Even if I only get a high-level description of the process?

- How to make a box file (for v4) of unicode chars

- How to make the training size invariant?

Etc.

Many thanks!

[Lorenzo Bolzani]

How many different chars do you need to detect? What is the size range (in pixels)? What kind of images, scans, smartphone pictures, screenshots?

If you just want to locate the symbols something like opencv matchTemplate may work. Or training an opencv/dlib hog detector may work better if the symbols are skewed and with complex lighting. Tesseract is not a text/symbols detector.

If you have multiple symbols use multiple patterns/train multiple detectors.

Bye

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[Shree Devi Kumar]

See https://github.com/Shreeshrii/tessdata_emoji

Font Awesome uses PUA Unicode range for the icons. So it did not work with text2image. I used other emoji fonts.

The script and training data used are also in the repo.

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