Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1976-07-26
1978-04-11
Griffin, Robert L.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358108, H04N 518, H04N 718
Patent
active
040841847
ABSTRACT:
A television object locator and image identifier, for use with a TV camera tube, having a lens whose axis is determined by the angles .theta..sub.c and .phi..sub.c. The angle .theta..sub.c forms a dihedral angle between two vertical planes, one of which contains the axis of the lens. The angle .phi..sub.c is formed by the vertical edge of the dihedral angle and the lens axis. The coordinates of the center of the lens are located at (x.sub.c, y.sub.c, z.sub.c), at the intersection of the edge and the lens axis, these coordinates also being those of the origin of the locator for a fixed camera position. Means are provided for determining the aperture angle .OMEGA..sub.c of the TV lens, as well as means for determining the angles .theta..sub.c and .phi..sub.c. Means are also provided for determining the coordinates (x.sub.o, y.sub.o, z.sub.o) of the object which is to be identified with respect to the origin. First and second means for transforming coordinates, have as inputs signals representing the angle .OMEGA..sub.c and the coordinates (x.sub.c, y.sub.c, z.sub.c), and (x.sub.o, y.sub.o, z.sub.o), and have as an output a signal representing the pair of coordinates (x.sub.T, y.sub.T), which are scaled proportionally to the dimensions of the location of the image in the total field of view. Means are provided for computing the precise location on the TV raster of the object to be identified, in the horizontal and vertical directions.
REFERENCES:
patent: 3859460 (1975-01-01), Westell
patent: 3903361 (1975-09-01), Alpers
patent: 3904817 (1975-09-01), Hoffman et al.
patent: 4002827 (1977-01-01), Nevin et al.
Griffin Robert L.
Johnston Ervin F.
Psitos Aristotelis M.
Sciascia Richard S.
Stan John
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