Extended Reality Recall System Using Digital Watermarking
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Solution Overview
Problem
Current recall activities in educational and professional settings face challenges such as unauthorized sharing and academic misconduct due to the same medium being used for presenting questions and capturing answers, which limits flexibility and increases the need for human proctoring, restricting location and time of activities.
Innovation Solution
An extended-reality system that uses a processor and non-transitory computer-readable medium to receive recall content, generate a digital watermark, render content in a virtual field of view, capture answers through various methods like image, gesture, or audio recognition, and send data to a server, decoupling questions and answers and allowing flexible answer capture based on question type and environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If questions and answers are presented using the same medium, then it is convenient for users to access and respond, but this enables unauthorized persons to copy or share the test content leading to academic misconduct
Solution Approach 1:
The system separates questions and answers into different media channels. Questions are delivered through an extended reality device (virtual medium) while answers are captured through physical actions in the real world (writing, gestures, speech). This segmentation prevents unauthorized copying because the answer capture methods are not easily replicable or shareable.
Solution Approach 2:
The extended reality device acts as an intermediary that delivers questions to the user's visual field while the answer capture occurs through physical actions. The system mediates between the digital question delivery and physical answer responses, using cameras and sensors to capture hand gestures, writing, or speech as answers, thereby preventing direct copying of the test content.
2Reliability
If human proctoring is required to prevent misuse, then academic integrity is maintained, but the complexity and cost of the recall activity increases
Solution Approach 1:
The system implements automated monitoring and answer capture without requiring human proctors. The extended reality device with integrated cameras and sensors automatically captures user actions (writing, gestures, speech) and processes them as answers. The system self-monitors the recall activity, recording user behavior and answer submissions without external human intervention, thereby maintaining academic integrity while reducing operational complexity.
3Object-affected harmful factors
If recall activities are conducted in controlled locations and times, then security is improved, but the flexibility and accessibility of the activities is reduced
Solution Approach 1:
The system transitions from controlling security through spatial-temporal constraints (location and time) to controlling security through dimensional separation of question delivery and answer capture. Questions are delivered in the virtual dimension via extended reality, while answers are captured in the physical dimension through cameras and sensors. This dimensional separation maintains security while allowing users to take recall activities anywhere and anytime with the extended reality device.
Data Source
AI summary
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for managing recall activities. One of the methods includes receiving, from a server, recall content associated with a recall activity session for provision to a user; generating a digital watermark based on information associated with the recall activity session; rendering the recall content to the user in a virtual field of view, wherein the digital watermark is embedded into the rendered recall content; capturing an answer to the recall content based on one or more activities of the user in a physical environment, the one or more activities being responsive to the rendering of the recall content; rendering the captured answer in the virtual field of view; and sending, to the server, data associated with the captured answer.