Motion-Based Image Watermarking via Lens Movement
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Solution Overview
Problem
Existing digital watermarking systems lack robustness and authenticity, as they can be easily removed or tampered with, failing to provide reliable proof of ownership and usage, especially when images are edited or processed post-capture.
Innovation Solution
Embedding a unique motion pattern in the lens or sensor of a digital imaging device during image capture, which is then verified through spectral analysis, creating both visible and invisible watermarks that are inherently linked to the image and difficult to remove without degrading the image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional digital watermarking is used, then ownership information can be embedded in images, but the watermark can be easily removed or tampered with
Solution Approach 1:
The motion pattern is applied during the image capture process itself, before the image is stored or processed. The lens or sensor moves according to a predetermined pattern while capturing the image, embedding the watermark inherently in the captured data without requiring post-processing watermarking operations.
Solution Approach 2:
The patent replaces traditional digital watermarking algorithms with a physical motion-based approach. Instead of embedding digital patterns through software processing, the system uses actual physical movement of optical components (lens or sensor) during capture to encode ownership information directly into the image data.
2Reliability
If motion patterns are embedded during image capture, then robust watermarks are created, but the imaging device complexity increases
Solution Approach 1:
The motion control system serves multiple functions: it captures images normally while simultaneously embedding the ownership watermark through controlled motion patterns. The same imaging device components (lens or sensor) used for normal operation are also used to encode the watermark, eliminating the need for separate watermarking hardware.
Solution Approach 2:
The system changes the motion parameters of existing imaging components (lens position or sensor position) during the capture process. By controlling the position and movement of these components according to predetermined patterns, the system embeds watermarks using parameters already inherent to the imaging device's operation.
3Measurement precision
If spectral analysis is used to verify watermarks, then authentication accuracy improves, but processing time increases
Solution Approach 1:
The motion pattern that creates the watermark is predetermined and stored in advance. During verification, the system compares the extracted motion characteristics against these pre-stored patterns, eliminating the need for complex real-time spectral analysis or iterative verification processes.
Data Source
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AI summary
A computer implemented method and system including providing a motion pattern to an imaging device; and acquiring an image with the imaging device, wherein the image has embedded signals representative of the motion pattern and the embedded signals provide an authenticating watermark. The embedded signals can comprise spectrum information selected from duration, dimension, acceleration and velocity.