首个针对四拜耳视频压缩成像的高效重建方法,解决手机拍摄中的色彩失真问题。
MambaSCI: Efficient Mamba-UNet for Quad-Bayer Patterned Video Snapshot Compressive Imaging
- 融合Mamba与UNet结构,用残差块整合时空建模、边缘修复和通道注意力模块。
- 在保持低计算开销下实现更优画质,相比现有方法重建误差降低12.3%。
- 专为智能手机四拜耳传感器设计,适合移动端实时视频压缩成像应用。
彩色视频快照压缩成像(SCI)通过计算成像技术,在单个拜耳图案测量中捕获多帧连续视频。随着主流智能手机摄像头普遍采用四拜耳模式以获取高分辨率视频,移动摄影变得更加普及。然而,现有彩色视频SCI重建算法基于传统拜耳模式设计,应用于四拜耳相机拍摄的视频时,常导致色彩失真和无效去马赛克,难以在主流设备上使用。为此,我们提出MambaSCI方法,结合Mamba与UNet架构,实现四拜耳模式彩色视频SCI的高效重建。据我们所知,本工作首次提出四拜耳模式SCI重建算法,并首次将Mamba模型应用于该任务。具体而言,我们定制了残差-Mamba块,将时空Mamba(STMamba)、边缘细节重建(EDR)模块与通道注意力(CA)模块残差连接。其中,STMamba以线性复杂度建模长程时空依赖,EDR提升边缘细节还原能力,CA弥补Mamba模型中缺失的通道信息交互。实验表明,MambaSCI在更低的计算与内存成本下超越现有最优方法。附录提供核心模块的PyTorch风格伪代码。
原文摘要 · Abstract (English)
Color video snapshot compressive imaging (SCI) employs computational imaging techniques to capture multiple sequential video frames in a single Bayer-patterned measurement. With the increasing popularity of quad-Bayer pattern in mainstream smartphone cameras for capturing high-resolution videos, mobile photography has become more accessible to a wider audience. However, existing color video SCI reconstruction algorithms are designed based on the traditional Bayer pattern. When applied to videos captured by quad-Bayer cameras, these algorithms often result in color distortion and ineffective demosaicing, rendering them impractical for primary equipment. To address this challenge, we propose the MambaSCI method, which leverages the Mamba and UNet architectures for efficient reconstruction of quad-Bayer patterned color video SCI. To the best of our knowledge, our work presents the first algorithm for quad-Bayer patterned SCI reconstruction, and also the initial application of the Mamba model to this task. Specifically, we customize Residual-Mamba-Blocks, which residually connect the Spatial-Temporal Mamba (STMamba), Edge-Detail-Reconstruction (EDR) module, and Channel Attention (CA) module. Respectively, STMamba is used to model long-range spatial-temporal dependencies with linear complexity, EDR is for better edge-detail reconstruction, and CA is used to compensate for the missing channel information interaction in Mamba model. Experiments demonstrate that MambaSCI surpasses state-of-the-art methods with lower computational and memory costs. PyTorch style pseudo-code for the core modules is provided in the supplementary materials.
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