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
.
A long time ago, I installed tesseract 3.05.01 for OCR using HomeBrew:
brew install --with-training-tools tesseract
How do I update it to the latest? I thought by regularly running the following, this would be done:
However, my tesseract has not been updated at all...