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hungpk/ocr.markdown

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Created March 27, 2014 17:06
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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.

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