clarkk clarkk - 3 months ago 27
Linux Question

tesseract (v3.03) output as PDF

Why is this error returned?

root@amd-3700-2gb ~/ocr_test # tesseract -l dan pdf.png out pdf
Tesseract Open Source OCR Engine v3.03 with Leptonica
Error opening data file /usr/local/share/tessdata/osd.traineddata
Please make sure the TESSDATA_PREFIX environment variable is set to the parent directory of your "tessdata" directory.
Failed loading language 'osd'
Tesseract couldn't load any languages!
Warning: Auto orientation and script detection requested, but osd language failed to load


Language list



root@amd-3700-2gb ~/ocr_test # tesseract --list-langs
List of available languages (3):
eng
dan
dan-frak


Output as txt



This works fine and output text to
out.txt


tesseract -l dan pdf.png out


Output PDF



This creates
out.pdf
but also retuns the error mentioned and the searchable text in the PDF doesn't make sense

tesseract -l dan pdf.png out pdf

Answer

The error message is clear: it needs osd.traineddata file. You can install or download Orientation & Script Detection Data for Tesseract from https://github.com/tesseract-ocr/tessdata.

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