ANALYTICAL GENERATION OF ORTHOPHOTOS FROM PANORAMIC PHOTOGRAPHS.

A procedure for computer assisted generation of orthophotos was developed. An array of map-pixels is defined over the area to be mapped. Restituting the panoramic photography process, the position of each map-pixel is located on the panoramic photograph and in the matrix of the grey-tone values associated with it. An appropriate grey-tone is derived from the matrix and assigned to the respective map-pixel. 'Painting' the map with grey tones, pixel by pixel, produces the required orthophoto map. The principal problems related to the above process are discussed and an example illustrating the procedure is presented. The process was primarily designed for panoramic photographs, but it is applicable to frame photographs as well.