Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1985-04-12
1987-08-04
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358180, 358 88, 358 92, 358 22, 340729, 364522, H04N 5262, H04N 1300, H04N 1302
Patent
active
046849904
ABSTRACT:
A plurality of input video signals (including background) are combined in accordance with priority. Each video signal comprises data samples corresponding to respective discrete locations on a viewing plane. The signals are preferably from an ADO transformation system wherein such data samples correspond to elements of an image lying in an image plane displaced from the viewing plane. Input key signals correspnding to respective locations are associated with respective input signals. Priority is shown determined from respective sets of plane defining signals as a sequence of depth signals corresponding to the depth coordinates of the respective image plane at the respective locations. The depth signals are used to produce respective weighting signals. The weighting signals and respective input key signals are used to produce in respect to each input video signal a set of processed key signals corresponding to respective coordinate locations on the viewing plane in the respective sequence, each set of processed key signals indicating the weighted portion of the respective data samples to be included in a combined video signal at each respective coordinate location. Corresponding data samples are cut by respective processed key signals to produce weighted data samples in respect to each input video signal in the respective sequence. The weighted data samples of the plurality of input video signals for each respective coordinate location on the viewing plane are combined in the respective sequence to produce a combined output video signal.
REFERENCES:
patent: 2974190 (1961-03-01), Geiger
patent: 3778542 (1973-12-01), Hanseman
patent: 4472732 (1984-09-01), Bennett et al.
Appel, Arthur, "The Notion of Quantitative Invisibility and the Machine Rendering of Solids," Proceedings A.C.M. National Meeting, 1967, pp. 387-393.
Wylie, Chris Gordon Romney, David Evans and Alan Erdahl, "Half-Tone Perspective Drawings by Computer," Fall Joint Computer Conference, 1967, pp. 49-58.
Sproull, Robert F. and Ivan E. Sutherland, "A Clipping Divider," Fall Joint Computer Conference, 1968, pp. 765-775.
Galimberti, R. and U. Montanari, "An Algorithm for Hidden Line Elimination," Communications of the ACM, vol. 12, No. 4, Apr. 1969, pp. 206-211.
Loutrel, Philippe P., "A Solution to the Hidden-Line Problem for Computer-Drawn Polyhedra," IEEE Transactions on Computers, vol. C-19, No. 3, Mar. 1970 pp. 205-213.
Bouknight, W. Jack, "A Procedure for Generation of Three-Dimensional Half-Toned Computer Graphics Presentations," Communications of the ACM, vol. 13, No. 9, Sep. 1970, pp. 527-536.
Gouraud, Henri, "Continuous Shading of Curved Surfaces," IEEE Transactions on Computers, vol. C-20, No. 6, Jun. 1971, pp. 623-629.
Sutherland, Ivan E., Robert F. Sproull and Robert A. Schumacker, "Sorting and the Hidden-Surface Problem," National Computer Conference, 1973, pp. 685-693.
Sutherland, Ivan E., Robert F. Sproull and Robert A. Schumacker, "A Characterization of Ten Hidden-Surface Algorithms," Evans & Sutherland Computer Corporation, about 1973.
Newman, W. M. and R. F. Sproull, Principles of Interactive Computer Graphics, Second Edition, McGraw-Hill, 1979, Chapter 23, pp. 356-357, and Chapter 24, pp. 368-373.
Foley, J. D., and A. Van Dam, "Fundamentals of Interactive Computer Graphics," Addison-Wesley, 1982, Reprinted with Corrections 1983, Chapter 15, pp. 553-573.
ADO Ampex Digital Electronics Service Manual Catalog No. 1809550-03, Nov. 1983, Section 1, pp. 1-1 to 1-4; Section 3, pp. 3-1 to 3-8; Section 5, pp. 5-1 to 5-40.
ADO Concentrator Service Manual Catalog No. 1809633-01, Apr. 1984, Section 1, pp. 1-1 to 1-5, and Section 3, pp. 3-1 to 3-55.
Fichera, Richard, "Rendering Adds Realism to Graphics," Electronics Week, Oct. 22, 1984, pp. 89-93.
Ampex Corporation
Britton Howard W.
Peng John K.
Schumacher Robert K.
Talcott Joel D.
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