tesseract（v3.03）输出为PDF

Question

为什么会返回此错误？

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

语言列表

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

输出为txt

这样可以正常工作并将文本输出到out.txt

tesseract -l dan pdf.png out

输出PDF

这会创建out.pdf，但也会重新提及所提及的错误，并且PDF中的可搜索文本没有意义

tesseract -l dan pdf.png out pdf

Answer 1

错误消息很明确：它需要osd.traineddata个文件。您可以安装或下载Orientation＆amp;来自https://github.com/tesseract-ocr/tessdata的Tesseract的脚本检测数据。