Recovering Sharp Video Sequence from Single Motion-Blurred Image with Cross-Shutter Guidance

核心概念

A novel dual imaging setting combining global shutter (GS) blur and rolling shutter (RS) views can effectively address the motion ambiguity in recovering a sharp video sequence from a single blurred image.

摘要

The content discusses a novel approach to recovering a sharp video sequence from a single motion-blurred image. The key insights are:

1. Motion blur decomposition is highly ambiguous, as the averaging effects of motion blur have severely destroyed the temporal ordering of latent frames. Existing solutions that rely on neighboring blurry frames or human annotations struggle to resolve this ambiguity.

2. The authors propose a dual imaging setting that combines a global shutter (GS) blurred image and a rolling shutter (RS) image. The RS view implicitly encodes the temporal ordering of latent frames, which can be leveraged to robustify the motion decomposition.

3. The authors develop a triaxial imaging system to capture aligned GS blur, RS, and high-speed ground truth video, and construct a real-world dataset called RealBR.

4. The authors introduce a novel neural network architecture with dual streams for motion interpretation. The blur stream focuses on contextual characterization while the RS stream handles temporal abstraction. A shutter alignment and aggregation module promotes mutual information exchange between the two streams.

5. Extensive experiments on the RealBR dataset demonstrate the effectiveness of the proposed dual Blur-RS setting and the neural network model in recovering sharp video sequences from single blurred inputs, outperforming state-of-the-art methods.

统计

The exposure time per row for the RS camera is 2 ms.
The exposure time per frame for the GS camera and RS camera is 18 ms.
The frame rate for the RS camera and GS camera is 20 fps.
The frame rate for the high-speed camera is 500 fps.

引用

"Motion blur is a frequently observed image artifact, especially under insufficient illumination where exposure time has to be prolonged so as to collect more photons for a bright enough image."
"Averaging effects of motion blur have severely destroyed the temporal ordering of latent frames, which cannot be restored solely by reconstruction loss."
"Considering the complementarity of Blur and RS images, we propose dual Blur-RS setting to solve the motion ambiguity of blur decomposition."

从中提取的关键见解

Motion Blur Decomposition with Cross-shutter Guidance

by Xiang Ji,Hai... 在 arxiv.org 04-02-2024

https://arxiv.org/pdf/2404.01120.pdf

更深入的查询

How can the proposed dual Blur-RS setting be extended to handle more challenging scenarios, such as large camera/object motions or low-light conditions

The proposed dual Blur-RS setting can be extended to handle more challenging scenarios by incorporating advanced techniques to address large camera/object motions or low-light conditions.
For large camera/object motions, the system can be enhanced by integrating robust motion estimation algorithms that can accurately track and compensate for significant movements. This can involve utilizing optical flow techniques or deep learning models specifically designed to handle large displacements. Additionally, the system can incorporate predictive algorithms to anticipate motion trajectories and adjust the decomposition process accordingly.
In low-light conditions, the dual Blur-RS setting can benefit from improved noise reduction and image enhancement techniques. This can involve implementing denoising algorithms tailored for low-light environments, as well as utilizing advanced image processing methods to enhance details and improve image quality. Furthermore, the system can leverage multi-frame fusion techniques to combine information from multiple frames to enhance the visibility of objects in low-light scenarios.

What are the potential limitations of the dual Blur-RS setting, and how can they be addressed in future research

While the dual Blur-RS setting offers significant advantages in motion blur decomposition, there are potential limitations that need to be addressed in future research.
One limitation is the complexity and cost associated with the triaxial imaging system required for capturing dual Blur-RS views. Future research can focus on developing more cost-effective and streamlined hardware solutions that can achieve similar results with fewer components. Additionally, efforts can be made to optimize the alignment and synchronization processes to reduce the computational overhead and improve efficiency.
Another limitation is the reliance on accurate alignment between the Blur and RS views. Any misalignment can lead to errors in the decomposition process and affect the quality of the reconstructed images. Future research can explore advanced alignment techniques, such as feature-based registration or deep learning-based alignment, to improve the accuracy of the alignment process and mitigate potential errors.

Given the advances in computational imaging, how can the proposed approach be integrated with emerging sensor technologies (e.g., event cameras) to further enhance the performance of motion blur decomposition

The proposed approach can be integrated with emerging sensor technologies, such as event cameras, to further enhance the performance of motion blur decomposition. Event cameras offer high temporal resolution and asynchronous operation, making them suitable for capturing fast-moving objects and dynamic scenes.
By incorporating event cameras into the dual Blur-RS setting, the system can benefit from the complementary strengths of both sensor types. Event cameras can provide additional temporal information and capture rapid changes in the scene, which can be used to improve motion estimation and disambiguation in the decomposition process.
Furthermore, event cameras can be leveraged to enhance the temporal resolution of the reconstructed video sequence, leading to more accurate and detailed results. By combining the event camera data with the Blur and RS views, the system can achieve superior performance in handling challenging scenarios with fast motion and complex dynamics.