1. A three-dimensional annotation method for conversion of two-dimensional images to three-dimensional images comprising: obtaining a two-dimensional source image; displaying said two-dimensional source image on a screen associated with a first computer; accepting a mask having an area associated with a line in a monochrome region in said two-dimensional source image; accepting a depth associated with said line within said monochrome region in said two-dimensional source image via an input device coupled with said first computer; applying said depth to said area of said mask in said two-dimensional image to create a three-dimensional image without altering a depth of a remainder of the monochrome region where said mask does not occur.