Title:
レンダリングパイプラインにおいてボリュームデータの勾配絶対値を用いてライティングの調整を行う調整装置及び調整方法
Document Type and Number:
Japanese Patent JP4435377
Kind Code:
B2
Abstract:
An apparatus generates lighting modulation factors for samples in a volume rendering pipeline. The apparatus includes a first arithmetic logic unit squaring a gradient magnitude vector of a sample to produce a squared gradient magnitude. A second arithmetic logic unit produces a gradient magnitude from the squared gradient magnitude. A shift register, connected to the first arithmetic logic unit, truncates a predetermined number of high bits of the squared gradient magnitude. A gradient magnitude modulation register stores modulation parameters. A first multiplexer, connected to the second arithmetic logic unit and the shift register, selects the truncated squared gradient magnitude as an index if an index source signal is true, and the gradient magnitude if the index source signal is false, and a memory table is indexes by the index to produce modulated opacity, emissive, diffuse and specular modulation factors.
Inventors:
James M Nittel
Jean Sea Hardenburg
Hans Peter Pfister
Drew Earl Martin
Jean Sea Hardenburg
Hans Peter Pfister
Drew Earl Martin
Application Number:
JP2000148876A
Publication Date:
March 17, 2010
Filing Date:
May 19, 2000
Export Citation:
Assignee:
Terra Recon Incorporated
International Classes:
G06T15/00; G06T15/08; G06T15/50
Domestic Patent References:
| JP11144078A | ||||
| JP9512937A | ||||
| JP773337A |
Attorney, Agent or Firm:
Michiharu Soga
Yutaka Ikeya
Hidetoshi Furukawa
Suzuki Kenchi
Keiro Mochizuki
Kajinami order
Taizo Shiraishi
Yutaka Ikeya
Hidetoshi Furukawa
Suzuki Kenchi
Keiro Mochizuki
Kajinami order
Taizo Shiraishi