Some web designers like to fade the edges of their images (or select images) in order to provide a softer contrast between the edges of their image and the background of their website. Doing this typically requires the use of some sort of photo editing software. Moderately skilled web developers may be able to use CSS and HTML code to generate a similar effect dynamically. This plugin, however, simplifies the process to merely applying an extra CSS class to an image after it has been uploaded.
Credits
Special thanks to Ben Nadel for his tutorial on overlaying gradients on images with jQuery. His tutorial inspired the creation of this plugin. [See the full tutorial]: http://www.bennadel.com/blog/1014-Creating-Transparent-Gradients-With-jQuery.htm
Te puedes descargar este plugin para utilizarlo en tu instalación autoalojada de WordPress.