Photogrammetric apparatus, methods of use, and products produced

Details Photogrammetric apparatus, methods of use, and products produced Photogrammetric apparatus, methods of use, and products produced

1975-03-12

1977-02-01

Stephan, Steven L.

Optics: image projectors

Mapping or aerial photograph rectifying

Stereoscopic

33 1A, 156 58, 156 59, 350117, 355 22, 356 2, G03B 2100, G03B 2156, G01C 1112

Patent

active

040059324

ABSTRACT:
Photogrammetric method and apparatus comprising a flexible platen used with standard stereo plotting instrumentation such as double-projection direct-viewing plotting instruments. The purpose of said flexible platen is to provide an absolute stereo image for photographic and other purposes. The flexible platen which is of sufficient size to provide a meaningful mapping surface is vertically adjustable at a multiplicity of points by mechanical, pneumatic, electro-mechanical, fully automated, or other means to provide an actual model-like three-dimensional photographic surface to enable relief distortion from the aerial photographs to be effectively eliminated in planimetric photographs which are taken of the adjusted flexible platen upon which the aerial images are projected. Additionally, an orthostereoscopic photo can be produced by the use of color film.
In another embodiment, a video system may be utilized with the flexible platen to provide orthophotographs and orthostereoscopic photos from United States Geographic Service topographic photographs.
In addition to various types of photographs and contour maps, actual relief models can be produced from the apparatus disclosed herein.

REFERENCES:
patent: 2100148 (1937-11-01), Parker
patent: 2309752 (1943-02-01), Cooke
patent: 2643576 (1953-06-01), Merriam
patent: 3140347 (1964-07-01), Cohen
patent: 3894802 (1975-07-01), Higgins

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