First, it is VERY important to understand that there is no 3D information in a photograph. Some systems convert the level of gray of a given pixel to a depth of cut. In general that method works very poorly. ArtCAM has some nice built in tools to help you go from a photograph to a relief (but it runs around $8,000 USD. I think Vetric V-Carve will some some manipulation of photos into a a sort of line art carving with a V-bit, but it is not really a relief (3D).
In short, there is no software than can do this automatically, as a photograph does not provide any 3D data.