The Output Using Multiple Languages

[Layne Wang]

Hi,

I'm using Tesseract 4.0.0-alpha on Ubuntu 16.04.

I refer to https://github.com/tesseract-ocr/tesseract/wiki/Command-Line-Usage, Using Multiple Languages section.

In the wiki, it says the sequence of  the arg <lang1+lang2> matters the output, and there is a priority for these languages.

My questions are

• What does "primary language" mean? I know it will affect the spacing and probably which character to output, but I'm not sure how it really works.
• How does tesseract choose the 'best' character among all the languages? Is it based on the confidence/score? And how does the sequence of the <lang1+lang2> arg affect the output?

Thanks in advance!

Layne