Variable Obfuscation Privacy Filters for Video Calls
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Solution Overview
Problem
Existing video call systems lack flexibility in privacy options, particularly for low-engagement calls, where participants may feel watched or inadvertently share information due to fixed video and audio settings, failing to address privacy concerns effectively.
Innovation Solution
The implementation of physical camera privacy filters with variable obfuscation capabilities, presence visualizations, and software-based obfuscation methods to enhance user privacy during video communications, allowing for adjustable transparency and engaging visual representations of user presence without sharing video.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physical camera privacy filters with variable obfuscation are implemented, then user privacy is improved, but device complexity increases
Solution Approach 1:
The patent introduces physical camera privacy filters as an intermediary element between the camera lens and the external environment. These filters (such as frosted glass, patterned overlays, or liquid crystal materials) mediate the light transmission to obscure the camera view while allowing the camera to continue functioning. This resolves the contradiction by providing privacy protection without requiring fundamental changes to the camera system architecture.
Solution Approach 2:
The patent employs filters that alter the optical properties of light passing through the camera, including changes in transparency, opacity, and light scattering characteristics. By modifying how light interacts with the camera lens through these filters, the system achieves variable obfuscation levels, improving privacy while maintaining camera functionality through optical rather than mechanical changes.
2Adaptability or versatility
If variable obfuscation levels are provided, then adaptability is improved, but ease of operation deteriorates
Solution Approach 1:
The patent implements dynamic privacy filtering where the obfuscation level can be adjusted during operation. This is achieved through mechanisms such as electrochromic filters that change transparency in response to electrical signals, or movable filter elements that can be positioned to provide different levels of obstruction. The system adapts to different privacy needs automatically or through simple user input, maintaining ease of operation while providing versatile privacy options.
Solution Approach 2:
The patent changes the optical parameters of the camera filter dynamically, such as transparency, opacity, or light scattering properties. By adjusting these parameters in response to user preferences or detected environmental conditions, the system provides multiple privacy levels without requiring complex mechanical adjustments or manual filter changes, thus maintaining ease of operation while improving adaptability.
3Loss of information
If presence visualizations are implemented, then loss of information is reduced, but device complexity increases
Solution Approach 1:
The patent creates simplified visual representations (copies) of the actual scene or user presence that can be displayed to other participants. Instead of transmitting the full video feed, the system generates abstract visualizations such as silhouettes, color-coded indicators, or simplified graphical representations that convey presence information. This reduces information loss about user presence while avoiding the complexity of processing and transmitting full video data.
Solution Approach 2:
The patent applies different levels of detail and information representation to different aspects of the presence visualization. Critical presence information (such as whether a user is present or active) is conveyed with high clarity, while less critical details are represented more abstractly. This selective approach to information representation reduces overall system complexity while maintaining effective communication of essential presence data.
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
This solution significantly improves the always-on video call experience by providing flexible privacy controls, clear visibility of obfuscation levels, and interpretable user engagement, even with privacy filters in place, ensuring users can expect their camera view is not clear and conveying presence information in a visually appealing manner.
Implementation Method 1
a privacy filter element that changes its transparency level in response to electrical signals
Data Source
AI summary
In one embodiment, a method includes maintaining a video communication between two or more client devices with each client device comprising cameras and being associated with a respective video stream in the video communication, determining scene data within a field of view in a real-world environment captured by one or more of the cameras of a first client device of the two or more client devices, determining a privacy filter to apply to a first video stream associated with the first client device based on the scene data, and providing instructions to apply the privacy filter to the first video stream in the video communication.