4D Light Field Display Viewpoint and Focus Control
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Solution Overview
Problem
Current methods for protecting and displaying 4D light-field data are complex and require additional processing, especially when degrading data for DRM purposes, which can impact user experience.
Innovation Solution
A method for displaying 4D light-field data that dynamically changes the point of view and focus plane based on viewing rights, incorporating random temporal changes and blurring effects, implemented through software or hardware components, to provide a degraded experience without additional processing requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If classical DRM techniques are used to protect 4D light-field data, then security is improved, but device complexity increases
Solution Approach 1:
The patent applies dynamics by making the point of view and focus plane change over time according to viewing rights. Instead of static degradation, the system dynamically adjusts viewing parameters (point of view position and focus plane distance) based on temporal patterns, creating a time-varying protection mechanism that simplifies the overall DRM implementation while maintaining security.
Solution Approach 2:
The patent changes physical viewing parameters (point of view position and focus plane distance) to achieve degradation. By modifying these parameters dynamically based on viewing rights, the system provides security without requiring complex signal processing or encryption, thus reducing device complexity while improving security.
2Reliability
If degraded 4D light-field data is displayed with static parameters, then security is improved, but user experience deteriorates
Solution Approach 1:
The system dynamically changes the point of view and focus plane over time, creating a moving degradation pattern that is harder to capture or exploit. This temporal dynamics maintains security while the controlled variation prevents completely static poor-quality display, improving user experience compared to fixed degraded parameters.
Solution Approach 2:
The patent implements periodic changes in viewing parameters where the point of view and focus plane follow temporal patterns. This periodic action creates a rhythm of degradation that maintains security (since full quality is never continuously available) while providing varying visual quality over time, improving user experience.
3Reliability
If additional processing is applied to degrade 4D light-field data for DRM, then security is improved, but processing time increases
Solution Approach 1:
The patent achieves security by changing display parameters (point of view position and focus plane distance) rather than applying complex signal processing to the 4D light-field data itself. This parameter-based approach provides DRM protection with minimal processing time, as it involves simple geometric transformations rather than heavy computational analysis.
Solution Approach 2:
The patent extracts only the essential viewing parameters (point of view and focus plane) that need to be controlled for DRM purposes, leaving the rest of the 4D light-field data processing unchanged. This selective approach provides security without requiring comprehensive additional processing of the entire data set, reducing processing time.
Data Source
AI summary
A method for displaying a content from 4D light field data is described. Such method is executed by an electronic device, and is remarkable in that it comprises changing point of view of the content and/or a focus plane associated with the content, according to viewing rights.