Camera Stabilization Filter for Panning Delay Reduction
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Solution Overview
Problem
Digital video stabilization in camera systems introduces delays when starting or stopping intentional panning movements, causing the operator to perceive a lag in image stabilization.
Innovation Solution
A method that estimates the physical movement of the camera system, determining whether it is being panned, and adjusts the video sequence to counteract unintended movements while preserving intended panning effects, using a low-pass filter to distinguish between high and low-frequency movements and shifting the image frame accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If digital video stabilization is applied to counteract unintentional camera movement, then image stability is improved, but delay occurs in starting and stopping intentional panning movements
Solution Approach 1:
The system performs preliminary classification of camera movement into intentional panning and unintentional jitter before applying stabilization. By pre-identifying the movement type using a classification model trained on movement patterns, the system can prepare appropriate stabilization responses in advance, reducing the perceptible delay when panning starts or stops.
Solution Approach 2:
The stabilization system dynamically adjusts its behavior based on the classified movement type. When panning is detected, the system reduces stabilization intensity to preserve intentional movement; when jitter is detected, full stabilization is applied. This dynamic adaptation eliminates the fixed delay characteristic of traditional stabilization systems.
2Ease of operation
If the camera system preserves panning effects in the video sequence, then operator control is maintained, but stabilization effectiveness is reduced
Solution Approach 1:
The camera movement is segmented into distinct components: intentional panning and unintentional jitter. The classification model separates these movement types, allowing the system to apply different processing to each segment. Panning segments preserve operator control while jitter segments receive full stabilization, achieving both goals simultaneously.
Solution Approach 2:
Different stabilization qualities are applied to different portions of the video sequence based on local movement characteristics. Frames identified as containing panning receive reduced stabilization to maintain operator control, while frames with jitter receive enhanced stabilization. This localized quality adjustment resolves the contradiction between control and stability.
Data Source
AI summary
For reducing a delay from panning a camera system, an estimate is received of a physical movement of the camera system. In response to the estimate, a determination is made of whether the camera system is being panned. In response to determining that the camera system is not being panned, most effects of the physical movement are counteracted in a video sequence from the camera system. In response to determining that the camera system is being panned, most effects of the panning are preserved in the video sequence, while concurrently the video sequence is shifted toward a position that balances flexibility in counteracting effects of a subsequent physical movement of the camera system.