Patent
1994-10-11
1997-04-08
Nguyen, Phu K.
G06F 1500
Patent
active
056196296
ABSTRACT:
A drawing data producing apparatus having a plurality of sequence tables into which sequence data indicating processing sequences of a plurality of blocks obtained by dividing a picture are written every objects constituting the picture with information in a Z-direction in three dimensional coordinates of representative pixels of the respective blocks being as addresses; and a sorting control section for carrying out, in a stepwise manner, Z-sorting of a plurality of sequence tables therebetween, to produce drawing data by stepwise Z-sorting of a plurality of sequence tables therebetween. Thus, even in the case where objects physically divided are present at depths close to each other, this drawing data producing apparatus excludes interference of polygon unit, thus making it possible to produce drawing data of excellent picture quality.
REFERENCES:
patent: 4825391 (1989-04-01), Merz
IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, 9-10 May 1991 New York US, pp. 607-610, XP 000280373 Shepard and Laporte `Real-Time Hidden Surface Removal in a Flight Simulator`.
Computer Aided Design, vol. 23, No. 10, Dec. 1991 London GB, pp. 684-691, XP 000247375 Karakas `Hidden-Line Algorithm Based on Range Searching`.
Frommer William S.
Nguyen Phu K.
Sinderbrand Alvin
Sony Corporation
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