libopencv-dev software package provides development files for opencv, 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 libopencv-dev
libopencv-dev is installed in your system.
Make ensure the libopencv-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep libopencv-dev *
You will get with libopencv-dev package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Library development |
| Package | libopencv-dev |
| Version | 2.4.8+dfsg1-2ubuntu1 |
| Description | development files for opencv |
| Sub Section | libdevel |