Caption Visible

Hi!
I would like to display the caption always visible (horizontal and vertical centered).
And I would like to have a hover image effect on the image.
For exemple, have a background-color grey with opacity and on hover action the grey disappear.

Image Effect with Visible Caption.

Here some exemples:
https://essential.themepunch.com/clients-grid-wilbert/
http://www.leechristianlaw.com/

Is it possible to do that with FooGallery?
Thank You!