Resizing Images in Genesis Responsive Slider

Authors have been posting content to our site for a while, when they set a featured image they often use images that are not uniform to the size/ aspect ratio that we want so that the slider will not expand and contract with the changing image size.

Is there a way for me to set the Genesis Responsive Slider to stretch images to a certain size and crop them to fit so that the slider looks uniform throughout all slides? An example can be seen here:
http://www.sportsmanslife.com/hunting/

http://wordpress.org/extend/plugins/genesis-responsive-slider/