Tablet Position Overlay in HMDs Using Code Recognition
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Solution Overview
Problem
Users wearing a head-mounted display (HMD) cannot accurately recognize the position of a tablet due to low accuracy in specifying the tablet's position, especially when moving, which affects their ability to interact with the tablet effectively.
Innovation Solution
An output control system that utilizes an imaging device to recognize codes displayed on a tablet in the real space, allowing for precise specification of the tablet's position, and then displays a shape representing the input region of the tablet in the virtual space within the HMD, enhancing accuracy and usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If infrared rays are used to specify the position of the tablet, then the user can recognize the tablet position, but the accuracy of specifying the position is low
Solution Approach 1:
The patent uses an imaging device to capture an image of the tablet and its surroundings, then generates a depth map by comparing the captured image with a reference image. This optical copying approach replaces the inaccurate infrared position specification method, achieving high-precision position detection through image processing rather than direct infrared measurement.
Solution Approach 2:
The patent substitutes the infrared-based position specification system with an optical imaging and image processing system. By using an imaging device to capture visual information and processing the images to generate depth maps, the system achieves more accurate position detection without relying on infrared radiation and its associated limitations.
2Adaptability or versatility
If a head mounted display is used, then the user can view virtual space, but the user cannot see the tablet in real space
Solution Approach 1:
The patent introduces an imaging device as an intermediary between the user and the tablet. The imaging device captures images of the tablet and the user's hand, and the system processes these images to provide position information and visual feedback in the virtual space displayed by the HMD, effectively mediating the user's interaction with the tablet without requiring direct visual contact.
Solution Approach 2:
The system creates visual copies of the tablet and hand movements in the virtual space through image processing. By capturing real-world images and rendering them in the virtual environment, the user can see representations of physical objects and actions in the HMD display, maintaining awareness of real-space interactions while wearing the head-mounted display.
3Measurement precision
If code recognition is used to specify tablet position, then position accuracy is improved, but additional imaging processing is required
Solution Approach 1:
The imaging device serves multiple functions: it captures images for position specification, tracks hand movements, provides visual feedback, and generates depth maps. By making the imaging device multi-functional, the patent avoids adding separate specialized devices for each function, thereby managing complexity while achieving high position accuracy through code recognition and image processing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves the accuracy of specifying the tablet's position, enabling users to interact more effectively with the tablet while wearing an HMD, even when moving, and reduces the need for additional infrared communication devices, thereby enhancing versatility and cost-effectiveness.
Implementation Method 1
recognizing a code displayed on the tablet in a real space using an imaging device
Data Source
AI summary
This output control system comprises: a specifying unit; and a first output control unit. The specifying unit specifies the position of a tablet by recognizing the code displayed on a tablet in a real space by using an imaging device. The first output control unit displays a shape representing an input area of the tablet of which the position is specified in a virtual space on the head-mounted display.