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Spatial-Frequency Awareness for Object Detection in RAW Images

Created by
  • Haebom

Author

Zhuohua Ye, Liming Zhang, Hongru Han

Outline

This paper proposes Space-Frequency Aware RAW Image Object Detection Enhancer (SFAE), a novel framework that integrates spatial and frequency domains to improve the performance of RAW image-based object detection. We note that existing methods struggle to effectively recover suppressed object details due to the wide dynamic range and linear response of RAW images, which only process the spatial domain. We leverage the natural ability to separate features such as object contours and textures in the frequency domain. SFAE reverse-transforms frequency bands to the spatial domain, enabling intuitive understanding. It utilizes a cross-domain fused attention module that enhances the interaction between spatial and frequency-domain features, and performs adaptive nonlinear adjustments for each domain.

Takeaways, Limitations

Takeaways:
It suggests the possibility of effectively addressing the problem of loss of object details due to the wide dynamic range and linear response of RAW images through frequency domain processing.
We demonstrate that combining the strengths of spatial and frequency domains can achieve improved object detection performance over existing methods.
Spatialization of frequency bands facilitates intuitive model understanding and design.
Limitations:
No quantitative evaluation results have been presented to evaluate how well the proposed SFAE performs compared to other state-of-the-art methods.
Lack of experimental results on diverse RAW image datasets makes it difficult to evaluate generalization performance.
Frequency domain processing can be computationally more expensive than spatial domain processing, and there may be limitations on real-time processing.
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