Feature matters for salient object detection. Existing methods mainly focus on designing a sophisticated structure to incorporate multi-level features and filter out cluttered features. We present Progressive Feature Polishing Network (PFPN), a simple yet effective framework to progressively polish the multi-level features to be more accurate and representative. By employing multiple Feature Polishing Modules (FPMs) in a recurrent manner, our approach is able to detect salient objects with fine details without any post-processing. A FPM parallelly updates the features of each level by directly incorporating all higher level context information. Moreover, it can keep the dimensions and hierarchical structures of the feature maps, which makes it flexible to be integrated with any CNN-based models. Empirical experiments show that our results are monotonically getting better with increasing number of FPMs. Without bells and whistles, PFPN outperforms the state-of-the-art methods significantly on five benchmark datasets under various evaluation metrics.

我们提出了一种简单而有效的渐进式特征磨光网络（PFPN）框架，通过多个特征磨光模块（FPM）逐步磨光多级特征以获得更准确、更具代表性的前景检测结果，而且不需要后处理。该方法能够检测出具有精细细节的显著对象，而且具有灵活性，可以集成到任何基于CNN的模型中。该方法在五个基准数据集上取得了显著的最优结果。

渐进特征优化网络在显著目标检测中的应用