What's the difference between the seam carving2008 and 2007?

[sunshinnnn]

Hello!
I' learning the seam carving recently. But I do not really understand the key of the seam carving 2008? What is the advantage of it with a graph method on image targeting? Where can be shown the seam carving 2008 in your code rather the 2007?
Thank you!

[sunshinnnn]

I' ve known ,thanks for my self.