Back-Projection Subpage in the Mark Page

The Proj, or Back-Projection, subpage is mainly used for constructing texture mapped surfaces. With computed camera parameters, any point with valid x, y, z values can be projected to the texture image. The image with computed values is used as a reference image while the texture image acts as the working image. It is accessed through the Mark page of the Main Window and has the following features:

• Back-project select point button: projects the selected points in the reference image to the working image.
• Move marks in all images button: repositions the selected points in the reference image. All marks of the selected points in different image windows are all affected. The marks are moved to a position that corresponds to the camera parameters calculated with the back-projection. This function is used to check marking and 3D computation error. A large movement means that there is a big error and that camera parameters are inaccurate.