feh software package provides imlib2 based image viewer, you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install feh
feh is installed in your system.
Make ensure the feh package were installed using the commands given below,
$ sudo dpkg-query -l | grep feh *
You will get with feh package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Graphics |
| Package | feh |
| Version | 2.3-2 |
| Description | imlib2 based image viewer |
| Sub Section | Graphics |