Both stereo-viewing methods are completely interchangeable. The program enables you to use inexpensive and geometrically unstable desktop publishing scanners for precise photogrametric work by means of special scanner calibration procedure.
Interior orientation is accomplished by entering focal length and principal point position.
The principal point position can be entered either by pointing directly if it is marked on an image, or by measuring fiducial marks. AT module is designed for fully digital photo-triangulation of blocks of images. Absolute orientation parameters for all images of a block are the output of the module. Images of a block then can be organized into a set of separate stereo pairs and transferred to StereoDraw module for stereo-plotting, or DTM module for DTM creation. User can specify the DTM grid size and position on an image.