OCR on OS X with tesseract

ocr.markdown

Install ImageMagick for image conversion:

brew install imagemagick

Install tesseract for OCR:

brew install tesseract --all-languages

Or install without --all-languages and install them manually as needed.

Make sure the input image is a grayscale .tif and fairly large. ~500x150 was too small, while ~2000*500 worked very well.

convert input.png -resize 400% -type Grayscale input.tif

OCR it. The default language is English. Language codes are 3 chars per man tesseract.

tesseract -l eng input.tif output

This creates output.txt.

why my execute brew install tesseract --all-languages is Error: invalid option: --all-languages ?

why my execute brew install tesseract --all-languages is Error: invalid option: --all-languages ?

Homebrew recently decided to remove all options from the homebrew-core Formula's as explained by @varenc

Hi, I have installed tessaract 4.0.0 smoothly by
brew install tesseract
but have only these languages available:
$ tesseract --list-langs List of available languages (3): eng osd snum
No above mention option like --with-all-languates does not work anymore :-/

Is there a way to install selected language(s)? Thanks!

Answering my own question:
brew install tesseract-lang
It installs most of the languages, but not all listed here: link
I need to install language "equ", still don't know how

thanks @bejvisek

MacOS user must use "brew install tesseract-lang" instant "brew install tesseract --all-languages"