Title:
CIRCUIT FOR COMPOSITING GASEOUS SUBSTANCE IMAGE
Document Type and Number:
Japanese Patent JP3966433
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To attain a real-time display that is essential for the drawing of a virtual reality system by multiplying the luminance of every substance by a value that is obtained from a distance function and the compositing permeation value for deciding the new composite luminance of a gaseous substance and a planar definition substance.
SOLUTION: A gaseous substance has a luminance Ig, a visual axis point Z0 and the permeation value Ag, and a plane definition substance has a luminance Is and a visual point Z1. The visual point coordinate values Z0 and Z1 are subtracted from each other via a subtracter 7a, and this difference value dZ is outputted. For the luminance, a value selected by a multiplexer 11 is multiplied by the output value of a table 9 via a multiplier 8c. This multiplied value is then multiplied by the luminance Ig and Is through the multipliers 8d and 8e respectively and then added together via an adder 10b. Thus, a final luminance Ip is obtained. The outputs of the multiplier 8e are inverted by a subtracter 7b and then added. The composited luminance obtained in this a way is displayed directly, after being stored in another image memory.
Inventors:
Tsuneo Ikedo
Application Number:
JP30142297A
Publication Date:
August 29, 2007
Filing Date:
September 26, 1997
Export Citation:
Assignee:
Digital Media Professional Co., Ltd.
International Classes:
G06T15/00; G06T17/00; G06T19/00; (IPC1-7): G06T15/00; G06T17/00
Domestic Patent References:
| JP9016811A | ||||
| JP5314241A |
Other References:
七田真之、外1名,散乱メタボールによる霧状物体のモデリングと表示,テレビジョン学会技術報告,日本,社団法人テレビジョン学会,1995年 2月 3日,第19巻 第7号,P19~P24
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