qtpfsgui software package provides luminance-hdr transitional package, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install qtpfsgui
qtpfsgui is installed in your system.
Make ensure the qtpfsgui package were installed using the commands given below,
$ sudo dpkg-query -l | grep qtpfsgui *
You will get with qtpfsgui package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Graphics |
| Package | qtpfsgui |
| Version | 2.3.0-3build1 |
| Description | luminance-hdr transitional package |
| Sub Section | Graphics |