Swift,
We are a small engineering consulting and we specialize in Video and Video related technologies.
We have the means to do image comparison and resolve a lot of your concerns. For instance, we can capture the License plate and determine which cars are leaving the site.
Your request could easily be solved by 3 cameras and one(2) PCs. One picture each for the front and driver side, one for the back and passenger side and one for the top. From the images we get the License plate image and store it with time-stamp. As the car is ready to leave, you take similar pictures and the sofware will match automatically from the pool of images of cars that are still inside the lot. Once matched you could compare images and determine differences automatically.
Personally you will only have a problem if
1- the owner claims damage while in the parking lot, (you solve this with the entry images)
2- The owner claims damage after the car left (you solve this with the two sets of images).
3 (Nasty) - Determine wether the owner has done the damage himself or if you want to find out how, who, where and when the damge was done. For this you need a wide range camera per row or parking section, this camera could be activated upon movement. Now this one is purely for human visual inspection after the fact.
Let us know if this solution will work for you, or if you wish to pursue this further. We would be open to a free initial consultation if you like.
Some demo of our capabilities could also be arranged.
Best Regards
John
