how does github 52 week participation work?

I'm confused about my github 52 week participation graphs. Most of the projects that I have on there only have开发者_StackOverflow社区 one author (me). However the "commits by owner" on the 52 week participation are zero, even though all my commits are by me.

My Page: https://github.com/yule

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It's probably that the email addresses in the Author fields of the commits in those projects don't match any of the email addresses associated with your GitHub account. If you go to "Account Settings" there's an option called "Email Addresses" where you can add additional email addresses that are associated with you, so GitHub can identify those commits as yours.