Semi-Synchronous Exposure Control for Multi-Lens Panoramic Cameras
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Solution Overview
Problem
Existing multi-lens panoramic cameras face issues with synchronous auto-exposure methods, leading to over-exposure or under-exposure in high light contrast scenes, as all lenses use the same exposure parameter, resulting in suboptimal image and stitching effects.
Innovation Solution
A method for determining semi-synchronous exposure parameters, where first exposure parameters are acquired for each lens, and if a preset EV limit value is not met, exposure control parameters are calculated using a control coefficient, ratios, and thresholds, allowing for adjustment of second exposure parameters to achieve semi-synchronized settings that balance image and stitching effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If synchronous auto-exposure method is used where all lenses use the same exposure parameter, then the exposure parameters are simple to calculate and control, but in high light contrast scenes this causes over-exposure for lenses facing outside and under-exposure for lenses facing indoors
Solution Approach 1:
The patent applies local quality by allowing each lens to have its own exposure parameters instead of using a uniform exposure parameter for all lenses. The system calculates separate exposure parameters for each lens based on its specific environmental brightness conditions, enabling optimized exposure for each lens while maintaining overall system simplicity through automated parameter calculation.
2Manufacturing precision
If each lens uses its own exposure parameter to optimize image quality, then exposure precision improves, but the complexity of calculating and managing exposure parameters increases
Solution Approach 1:
The patent implements self-service by having the system automatically calculate and adjust exposure parameters for each lens based on its environmental brightness conditions. The processing unit autonomously determines appropriate exposure parameters without requiring manual intervention or complex user input, thereby reducing operational complexity while maintaining high exposure precision.
3Reliability
If exposure parameters are adjusted for each lens to balance image and stitching effects, then image and stitching quality improve, but the calculation process becomes more complex
Solution Approach 1:
The patent applies feedback by continuously monitoring the exposure parameters of adjacent lenses and adjusting each lens's exposure parameter based on the differences with its neighbors. The system uses feedback from the environmental brightness conditions and adjacent lens parameters to iteratively optimize exposure settings, ensuring balanced image and stitching quality while managing calculation complexity through systematic feedback loops.
Data Source
AI summary
Disclosed are a method for determining semi-synchronous exposure parameters and an electronic device. The method in the embodiments of the present invention comprises: acquiring first exposure parameters corresponding to each lens; if it is determined that a preset EV limit value is not satisfied according to the first exposure parameters of each lens and adjacent lenses, respectively calculating exposure control parameters of each lens; calculating second exposure parameters corresponding to each lens according to the exposure control parameters of each lens and the first exposure parameters corresponding to each lens; if it is determined that the preset EV limit value is satisfied according to the second exposure parameters of each lens and adjacent lenses, determining the second exposure parameters corresponding to each lens to be semi-synchronized exposure parameters of each lens.