Coded Shutter Space-Time Volume Reconstruction
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Solution Overview
Problem
Cameras face a trade-off between spatial and temporal resolution, often sacrificing spatial resolution for higher temporal resolution, which degrades image quality, and existing solutions to improve temporal resolution without compromising spatial resolution are limited.
Innovation Solution
Systems and methods that reconstruct a space-time volume from a coded image using an image sensor and processor, employing a coded shutter function to capture and process image data, allowing for improved temporal resolution without sacrificing spatial resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If parallel A/D convertors and frame buffers are introduced to increase readout throughput, then temporal resolution is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines multiple functions (shutter control, light modulation, and image capture) into a single integrated coded aperture structure. This merging eliminates the need for separate parallel A/D convertors and frame buffers, achieving high temporal resolution while reducing device complexity and cost.
Solution Approach 2:
The coded aperture serves as an intermediary optical element that modulates light in the optical domain before detection. By performing temporal encoding optically rather than electronically, the system achieves high-speed temporal resolution without requiring complex electronic readout infrastructure.
2Speed
If parallel A/D convertors and frame buffers are introduced to increase readout throughput, then temporal resolution is improved, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple functions (shutter control, light modulation, and image capture) into a single integrated coded aperture structure. This merging eliminates the need for separate parallel A/D convertors and frame buffers, achieving high temporal resolution while reducing device complexity and cost.
Solution Approach 2:
The coded aperture can be implemented as a simple, inexpensive optical element (such as a static mask or programmable metasurface) that replaces expensive electronic components. This approach prioritizes optical simplicity over electronic complexity, significantly reducing manufacturing costs.
3Speed
If thin-out mode is implemented to increase temporal resolution, then temporal resolution is improved, but spatial resolution and image quality deteriorate
Solution Approach 1:
The coded aperture divides the optical field into multiple coded regions that simultaneously encode temporal information. Each spatial location in the captured image corresponds to a specific time window, allowing full spatial resolution to be maintained while achieving high temporal resolution through computational reconstruction.
Solution Approach 2:
The patent encodes temporal information in the spatial domain through the coded aperture pattern. By mapping time onto space optically, the system captures temporal resolution as an additional dimension in the spatial image, enabling subsequent computational separation of temporal and spatial information without sacrificing either.
Data Source
AI summary
Systems, methods, and media for reconstructing a space-time volume from a coded image are provided. In accordance with some embodiments, systems for reconstructing a space-time volume from a coded image are provided, the systems comprising: an image sensor that outputs image data; and at least one processor that: causes a projection of the space-time volume to be captured in a single image of the image data in accordance with a coded shutter function; receives the image data; and performs a reconstruction process on the image data to provide a space-time volume corresponding to the image data.