Hmm, I fixed this on the images-next branch but forgot to fix it on master. Will be fixed in https://github.com/timholy/Images.jl/pull/564.
If you're just getting started with Julia & Images, you might want to consider using the upcoming version of Images. See https://github.com/timholy/Images.jl/issues/542#issuecomment-254059092. Best, --Tim
