libleptonica-dev software package provides image processing library, 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 libleptonica-dev
libleptonica-dev is installed in your system.
Make ensure the libleptonica-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep libleptonica-dev *
You will get with libleptonica-dev package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Library development |
| Package | libleptonica-dev |
| Version | 1.70.1-1 |
| Description | image processing library |
| Sub Section | libdevel |