AR Scene Orientation via User Nodal Point Tracking
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Solution Overview
Problem
Current augmented reality applications on handheld devices lack true immersion due to the technical disconnect between the device's perspective and the user's perspective, failing to provide a sensing mechanism coupled to the human viewer, resulting in a non-immersive experience.
Innovation Solution
A method and apparatus that determine the real orientation of a device relative to a projection matrix and the user's orientation relative to a nodal point, allowing the device to orient and display virtual and augmented reality scenes as if viewed from the user's perspective, using a combination of sensors and a processor to create an immersive experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a handheld device is used for augmented reality applications, then portability and accessibility are improved, but true immersion is lost due to the disconnect between device perspective and user perspective
Solution Approach 1:
The patent introduces an intermediary system consisting of multiple sensors (accelerometers, gyroscopes, magnetometers, cameras) and processing logic that acts as a mediator between the handheld device and the user's perspective. This intermediary captures device orientation, calculates nodal point orientation, and generates corrected rendering perspectives that bridge the gap between device viewpoint and user viewpoint, enabling immersion while maintaining portability
Solution Approach 2:
The patent replaces the direct mechanical coupling of sensors to the user's head (as in head-mounted displays) with a computational substitution approach. Instead of physically coupling sensors to the user, the system uses software-based perspective correction algorithms that mathematically transform the rendered scene based on sensor data, achieving immersion without the mechanical complexity of head-mounted equipment
2Device complexity
If the display is oriented relative to the device rather than the user, then device control is simplified, but the viewing experience becomes non-immersive and disconnected from the user's actual perspective
Solution Approach 1:
The patent implements a dynamic orientation system that continuously adapts the rendering perspective based on real-time sensor input. The system dynamically calculates the nodal point orientation from device orientation data and continuously updates the rendering perspective to match the user's actual viewing direction, creating a responsive and immersive experience that adapts to user movement while maintaining manageable device control through automated processing
Data Source
AI summary
A method of presenting a scene to a user according to a preferred embodiment includes determining a real orientation of a device relative to a projection matrix and determining a user orientation of the device relative to a nodal point. The method of the preferred embodiment can further include orienting a scene displayable on the device to the user in response to the real orientation and the user orientation; and displaying the scene on the device. Variations of the method can include a three-dimensional aspect of the scene with which the user can interact through manipulation of the real orientation and/or the user orientation of the device. The method of the preferred embodiment can be performed by an apparatus and/or embodied in computer program product including machine-readable code.