Optical Signature Superposition for Secure Video Transmission
Solution Overview
Problem
Existing systems for remote image transmission from cameras, such as those used in automated vehicles, face issues with reliability due to delays, erroneous compression, and malfunctions, which consume bandwidth and affect the accuracy of transmission.
Innovation Solution
An installation that includes a video acquisition system, a module for generating an optical signature with polygonal zones, and a superposition module to project this signature onto the image of an object, forming a secure image for transmission, which can be analyzed for errors and ensures transmission times under 500 milliseconds, optimizing compression and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If camera identification information or timestamp is projected into the camera's field of view, then the transmission security is improved, but the bandwidth consumption increases and compression efficiency deteriorates
Solution Approach 1:
The patent extracts the security information (camera ID and timestamp) from the main video content and projects it as a separate optical signature in the periphery of the field of view. This separation allows the security information to be transmitted and verified independently from the main video stream, reducing the bandwidth burden on the primary transmission channel while maintaining transmission security.
Solution Approach 2:
The security information is segmented into distinct visual elements (camera ID and timestamp) that are projected as separate regions within the optical signature. This segmentation enables selective processing and verification of security data without requiring full-frame transmission, thereby optimizing compression ratios and reducing overall bandwidth consumption.
2Loss of energy
If video images are transmitted with compression, then the bandwidth consumption is reduced, but transmission errors and reliability issues increase
Solution Approach 1:
The optical signature acts as an intermediary verification element that is easily transmittable and can be independently validated. By separating the security verification function from the main video content, the system can use lighter compression for the signature while applying optimized compression to the main stream, achieving a balance between bandwidth efficiency and transmission reliability.
3Measurement precision
If the optical signature is positioned in the periphery of the field of view, then the main object analysis is improved, but the security information visibility is reduced
Solution Approach 1:
The patent applies different quality standards to different regions of the image: the central region maintains high quality for accurate object analysis, while the peripheral region contains the optical signature with sufficient visual distinctiveness for security verification. This local differentiation ensures that each region serves its primary function effectively without compromising the other.
Data Source
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AI summary
The invention relates to a device (12) for forming a secure image of an object (11), the device (12) comprising: - a video acquisition system (21) including an acquisition surface, the image of the object (11) being formed on the acquisition surface, - a module (24) for generating a security image, the security image comprising an optical signature, and - a module (26) for superimposing the security image onto the image of the object (11), formed on the acquisition surface, to form a secure image of the object (11) on the acquisition surface. The optical signature comprises at least one figure comprising at least two zones, the generation module (24) being adapted to generate a pattern moving over the zones of the figure according to a predefined sequence.