Dr Mark Carlotto
In the mid 1980's, scientists, reviewing remotely sensed imagery of the Martian
surface, came upon a geologic feature that looked very much like a
human face. During the same period, TASC's Dr. Mark Carlotto developed an
unique "shape from shading" algorithm that enables one to extract
approximate elevation relief from imagery. The Martian imagery provided an
excellent dataset for prototyping this algorithm as with no atmosphere and
well understood reflectivity, the surface provides near perfect Lambertian
reflection - and hence a means of determining relative surface normals.
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