I was adding GoGi etc to it and figured I'd add rasterx while I was at it.. Anyway, looks like you'll have to do some things and submit it separately if you want to:
avelino/awesome-go#2222
These should be improved, they have a lot of issues, especially with golint:
https://goreportcard.com/report/github.com/srwiley/rasterx
These miss a lot of documentation, which should also be improved:
https://godoc.org/github.com/srwiley/rasterx
these don't have enough coverage:
https://github.com/srwiley/rasterx