Interactive Digital Correlation Techniques for Automatic Compilation of Elevation Data

摘要

A program using digital correlation techniques has been implemented on the Digital Image Analysis Laboratory (DIAL) to extract elevation data automatically from stereoscopic pairs of digital images. The DIAL enables the operator to view on a display unit the stereoscopic model and the computed match-point coordinates in 3-D using anaglyphic techniques. The match points are presented as 3-D profiles superimposed over the 3-D terrain model, and consequently, the operator can observe the compilation process, detect errors as soon as they occur, and interact with the process to prevent the accumulation of error or to tune the parameters as conditions warrant. The program is described in terms of the hardware, the algorithm, the operating procedures, and the examples of compiled areas. (Author)