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Towards Size-invariant Salient Object Detection: A Generic Evaluation and Optimization Approach

Created by
  • Haebom

Author

Shilong Bao, Qianqian Xu, Feiran Li, Boyu Han, Zhiyong Yang, Xiaochun Cao, Qingming Huang

Outline

This paper addresses the issue of scale invariance in evaluation protocols for Salient Object Detection (SOD). Specifically, we focus on scenarios where multiple salient objects of significantly different sizes appear within a single image. We demonstrate the size sensitivity of existing SOD metrics and theoretically demonstrate that the evaluation results can be decomposed in such a way that the contribution of each component is directly proportional to the size of the corresponding region. To address the problem of underestimation of small objects due to this size imbalance, we propose a Size-Invariant Evaluation (SIEva) framework that evaluates each component individually and aggregates the results. Furthermore, we develop a model-agnostic optimization framework (SIOpt) that adheres to the principle of scale invariance and improves the detection of salient objects of various sizes. Furthermore, we present a generalization analysis of the SOD methodology and provide evidence supporting the validity of the new evaluation protocol.

Takeaways, Limitations

Takeaways:
We first raise the issue of size bias in existing SOD evaluation metrics and propose a new evaluation and optimization framework to address this issue.
The SIEva framework offers the potential to increase the fairness of SOD performance evaluation and improve the detection of small objects.
Due to its model-agnostic nature, SIOpt can be applied to various SOD models, and performance improvements in real-world applications can be expected.
The validity of the proposed methodology is proven through theoretical analysis and experiments.
Limitations:
Limitations, specifically mentioned in the paper, is not specified. (Unable to determine from the paper summary alone.)
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