ENH: increased coverage for Image class
ENH: increased coverage for Image class

cpatrick/CDash,jcfr/CDash,jcfr/CDash,jcfr/CDash,cpatrick/CDash,cpatrick/CDash,jcfr/CDash,jcfr/CDash,cpatrick/CDash,cpatrick/CDash,jcfr/CDash,cpatrick/CDash