YoImages SEO is a Wordpress plugin that provides image SEO functions.
YoImages SEO is part of a suite of modules which aim is to add better image handling capabilities to the Wordpress core, read more about YoImages SEO.
You can get YoImages SEO along with other YoImages modules here or you can install it as a stand alone Wordpress plugin following the steps described in the next paragraph.
YoImages SEO is built with Composer. To install it from sources go to your Wordpress plugin directory via terminal and there:
git clone https://github.com/sirulli/yoimages-seo.git
cd yoimages-seo
curl -sS https://getcomposer.org/installer | php
php composer.phar install
To update your installed YoImages SEO plugin from sources go to Wordpress plugin directory via terminal and there:
cd yoimages-seo
git pull
php composer.phar update