Mixed reality presentation system and brightness adjustment method of virtual light source
AssigneeCanon Kabushiki Kaisha
InventorTaichi Matsui
Life of this patent
Estimating the term…
Abstract
Based on an observer's position and observing direction measured in the real world and positions of a virtual light source and virtual object in a virtual world, a brightness adjustment value of the virtual light source is adjusted in a way that, when light from the virtual light source is blocked by an observer, brightness of the virtual object observed by the observer is reduced as if the observer were observing in the real world. As a result, a mixed reality presentation system that achieves a sense of reality is provided.
Claims8
A mixed reality presentation system comprising:
- an image sensing unit configured to sense an object of a real world;
- a unit of measuring positions and directions configured to measure an image sensing position and an image sensing direction of said image sensing unit;
- a virtual image generator configured to draw a virtual object illuminated by light from a virtual light source and generate a virtual image;
- a calculation unit of light effect configured to calculate an adjustment value of brightness of the virtual light source using the position and image sensing direction of said image sensing unit, a position of the virtual light source, and a position of the virtual object measured by said unit of measuring positions and directions;
- an adjustment unit configured to adjust brightness of the virtual light source in said virtual image generator using the adjustment value of brightness calculated by said calculation unit of light effect;
- and
- an image synthesizer configured to synthesize the sensed object image of the real world with the virtual image generated by said virtual image generator.
A mixed reality presentation system comprising:
- an image sensing unit configured to sense an object of a real world;
- a unit of measuring positions and directions configured to measure an image sensing position and an image sensing direction of said image sensing unit;
- a virtual image generator configured to draw a virtual object illuminated by parallel light from a virtual light source and generate a virtual image;
- a calculation unit of light effect configured to calculate an adjustment value of brightness of the virtual light source using the position and image sensing direction of said image sensing unit, an irradiating direction of the parallel light, and a position of the virtual object measured by said unit of measuring positions and directions;
- an adjustment unit configured to adjust brightness of the virtual light source in said virtual image generator using the adjustment value of brightness calculated by said calculation unit of light effect;
- and
- an image synthesizer configured to synthesize the sensed object image of the real world with the virtual image generated by said virtual image generator.
A method of adjusting brightness of a virtual light source in a mixed reality presentation system, comprising the steps of:
- sensing an object of a real world;
- measuring an observer's position and observing direction;
- drawing a virtual object illuminated by light from a virtual light source and generating a virtual image;
- calculating an adjustment value of brightness of the virtual light source using the measured observer's position and observing direction, a position of the virtual light source, and a position of the virtual object;
- adjusting brightness of the virtual light source using the calculated adjustment value of brightness;
- and
- synthesizing the sensed object image of the real world with the generated virtual image.
Dependencies are inferred from the claim text.