Imaging System with Periodicity Estimation for Moving Targets
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Solution Overview
Problem
Existing imaging systems for biometric authentication and gait recognition struggle to effectively capture images of moving targets while considering their periodic movements, leading to suboptimal image quality.
Innovation Solution
An imaging system comprising an information acquisition unit, a periodicity estimation unit, and an image acquisition unit that acquires movement information, estimates periodicity, and controls a camera to image the target based on the estimated periodicity, thereby improving image capture in sync with the target's movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a camera is used to image a moving target without considering periodic movement, then the imaging system is simple, but the image quality and authentication accuracy deteriorate
Solution Approach 1:
The system performs preliminary actions by estimating the periodicity of the target's movement before capturing the image. The periodicity estimation unit analyzes movement information in advance to determine the rhythm of the target's periodic motion, and then the image capture timing is adjusted based on this pre-estimated periodicity to capture images at appropriate moments in the movement cycle.
Solution Approach 2:
The imaging system dynamically adjusts its operation based on the detected periodicity of the target's movement. Rather than using a fixed capture timing, the system continuously monitors movement information and adapts the image capture timing to match the dynamic periodic pattern of the target, ensuring optimal image quality regardless of movement variations.
2Reliability
If the camera captures images continuously without periodicity consideration, then no timing adjustment is needed, but the authentication accuracy and image appropriateness worsen
Solution Approach 1:
The system implements feedback by continuously monitoring movement information and using it to adjust image capture timing. The periodicity estimation unit receives movement information as feedback about the target's periodic motion, processes this feedback to determine the optimal capture timing, and then applies this timing adjustment to improve authentication accuracy.
Solution Approach 2:
The imaging system serves itself by automatically estimating periodicity from its own movement information detection and using this self-generated information to optimize its capture timing. The system does not require external control or manual adjustment; it autonomously adapts its operation based on the detected periodic patterns in the target's movement.
3Measurement precision
If multiple cameras are used to track periodic movement, then movement detection improves, but the device complexity and cost increase
Solution Approach 1:
The movement information acquisition unit is designed with multi-functionality, serving dual purposes: it detects the target's periodic movement to estimate periodicity, and simultaneously provides the basis for determining optimal image capture timing. This universal component performs multiple functions without requiring separate dedicated systems for movement detection and timing control.
Solution Approach 2:
The system merges the movement detection function and the periodicity estimation function into a single integrated process. Rather than using separate cameras and processing units for movement tracking and image capture, the system combines these functions, using the same movement information acquisition to drive both periodicity estimation and timing control decisions.
Data Source
AI summary
An imaging system includes: an information acquisition unit that acquires movement information about a movement of at least a part of a target; a periodicity estimation unit that estimates periodicity about the movement of at least a part of the target, on the basis of the movement information; and an image acquisition unit that controls a camera for imaging the target on the basis of the periodicity and acquires an image of the target. According to such an imaging system, it is possible to properly image a moving target.