Hi. My name is*****'m a camera repair technician with over 20 years in the business and I'll be glad to help you with your question today.
It is possible to recover deleted images or images that have been reformatted as long as the space they occupied on the card has not been recorded over.
There are many excellent video recovery programs on the market today. The one I use most is Photo Rescue available at the site below. It's not free but I've found it invaluable on many occasions. It is easy to use and very thorough.