Heterogeneous Array Camera Layout for Rich Light Field Sampling
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Solution Overview
Problem
Existing array camera systems struggle to efficiently capture and process pixel data across a field of view, and enable the collected pixel data to be combined and rendered to yield desired frames of imagery at desired resolutions.
Innovation Solution
The system employs multiple imagers with varying characteristics such as monochromatic data capture, filter arrays, different focal lengths, and frame rates to capture richer light field sampling while optimizing for cost and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple imagers with varying characteristics are used to capture richer light field sampling, then image quality and spectral information are improved, but device complexity and power consumption increase
Solution Approach 1:
The camera system is divided into multiple independent imager units, each with specific specialized functions (monochromatic, color, different focal lengths). This segmentation allows each imager to be optimized for its specific role while collectively providing comprehensive light field sampling capability.
Solution Approach 2:
The heterogeneous array of imagers is designed to perform multiple functions simultaneously - capturing spectral information, spatial information, depth information, and temporal information. This multi-functionality approach allows a single camera system to replace what would traditionally require multiple separate imaging devices.
2Measurement precision
If multiple imagers with varying characteristics are used to capture richer light field sampling, then image quality and spectral information are improved, but power consumption increases
Solution Approach 1:
Different regions of the camera array are assigned different imaging characteristics based on local requirements. For example, certain imagers are dedicated to monochromatic sensing while others handle color, and some have fixed focal lengths while others have variable focus. This local optimization ensures that each imager consumes power efficiently for its specific function rather than all imagers being over-specified.
Solution Approach 2:
The system dynamically adjusts operational parameters such as frame rates for different imager types, activation states of variable focus actuators, and data processing priorities. By changing these parameters based on scene requirements, the system optimizes power consumption while maintaining necessary image quality.
3Adaptability or versatility
If heterogeneous imagers with different focal lengths and frame rates are used, then imaging versatility is improved, but data processing complexity increases
Solution Approach 1:
The camera system incorporates dynamic control mechanisms that adjust focal lengths and frame rates of different imagers based on real-time scene analysis. This dynamic adaptation allows the system to handle diverse imaging scenarios while the control algorithms coordinate the heterogeneous imagers to reduce processing complexity through intelligent task allocation.
Solution Approach 2:
The system employs feedback mechanisms where captured data from various imagers is continuously analyzed and used to adjust imaging parameters. This feedback loop enables the system to optimize the contribution of each imager type based on actual scene requirements, reducing unnecessary data processing while maintaining imaging versatility.
Data Source
AI summary
Detailed camera systems and methods achieve rich light field sampling within limited cost and power constraints. Exemplary arrangements include designs for heterogeneous array cameras, including multifocal arrays, arrays matching depth of field to have uniform pixel density, array-aware focus, exposure and frame rate control, multispectral arrays, and multiscale arrays. One embodiment incorporates lens assemblies of two different types: a first type in which all lens elements move under control of a focus actuator, and a second type in which only some of the lens elements move under control of a focus actuator—the others are stationary. A great number of other features and arrangements are also detailed.