3D Depth Camera and Projector Interaction System
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Solution Overview
Problem
Current techniques for creating and interacting with objects, such as interactive tabletop displays and wall displays, do not provide a richly expressive, realistic, and immersive interface that is also easy to learn and use.
Innovation Solution
An interaction system that captures depth and video images of physical objects to generate 3D virtual objects, allowing users to manipulate and project these objects onto surfaces using a 3D projector, with features like projective texturing and physics simulation for realistic behavior.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional interactive tabletop displays and wall displays are used, then the interface can be simple and easy to manufacture, but the interface is not richly expressive, realistic, and immersive
Solution Approach 1:
The system creates virtual copies of physical objects using depth imaging and 3D modeling. The depth camera captures the physical object's geometry, and a virtual counterpart is generated that can be manipulated independently while maintaining the original object's visual appearance through texturing.
Solution Approach 2:
The system transitions from 2D display surfaces to 3D virtual objects that occupy spatial volume. By projecting stereoscopic images and creating three-dimensional virtual counterparts of physical objects, the interface gains depth and spatial realism, enabling immersive interactions beyond flat screens.
2Manufacturing precision
If 3D depth camera and video camera are used to capture physical objects, then realistic 3D virtual objects can be created, but the device complexity and processing requirements increase
Solution Approach 1:
The system combines depth imaging and video imaging into a unified capture and processing pipeline. The depth camera and video camera work together to simultaneously capture geometric and visual information, which are then integrated to create textured 3D models in real-time.
Solution Approach 2:
The system replaces complex mechanical 3D scanning and modeling equipment with optical sensing approaches. Using depth cameras and structured light projection, the system optically captures and processes 3D geometry without requiring physical contact or complex mechanical measurement apparatus.
3Manufacturing precision
If projective texturing technique is used to apply texture to 3D virtual objects, then natural-looking objects can be created on irregular surfaces, but the processing complexity increases
Solution Approach 1:
The projective texturing technique applies textures specifically tailored to each local region of the 3D virtual object based on the depth image geometry. By adapting the texture projection to the local surface orientation and shape, the system achieves realistic appearance on irregular surfaces while maintaining computational efficiency.
4Reliability
If physics simulator is incorporated to generate simulation effects, then realistic object behavior can be achieved, but the computational requirements and processing time increase
Solution Approach 1:
The physics simulator applies simulation effects selectively based on triggering events rather than continuously simulating all physical interactions. When a user performs a telltale action on a virtual object, the system activates relevant physics effects (deformation, breaking, fluid dynamics) only for that specific interaction, reducing overall computational burden while maintaining realism when needed.
Data Source
AI summary
An interaction system is described which uses a depth camera to capture a depth image of a physical object placed on, or in vicinity to, an interactive surface. The interaction system also uses a video camera to capture a video image of the physical object. The interaction system can then generate a 3D virtual object based on the depth image and video image. The interaction system then uses a 3D projector to project the 3D virtual object back onto the interactive surface, e.g., in a mirrored relationship to the physical object. A user may then capture and manipulate the 3D virtual object in any manner. Further, the user may construct a composite model based on smaller component 3D virtual objects. The interaction system uses a projective texturing technique to present a realistic-looking 3D virtual object on a surface having any geometry.