For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:expeehaa/openSUSE_Tumbleweed/home:expeehaa.repo
zypper refresh
zypper install eog
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:expeehaa/16.0/home:expeehaa.repo
zypper refresh
zypper install eog
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:expeehaa/15.6/home:expeehaa.repo
zypper refresh
zypper install eog