# SAC-Net: Spatial Attenuation Context for Salient Object Detection

## TL;DR

SAC-Net introduces a novel deep neural network that adaptively propagates and aggregates local and global image context features with variable attenuation, significantly improving salient object detection performance.

## Contribution

The paper proposes the spatial attenuation context (SAC) module for adaptive context feature integration, enhancing salient object detection within a deep end-to-end network.

## Key findings

- Outperforms 29 state-of-the-art methods on six benchmarks.
- Achieves superior quantitative and visual detection results.
- Effectively integrates local and global context features.

## Abstract

This paper presents a new deep neural network design for salient object detection by maximizing the integration of local and global image context within, around, and beyond the salient objects. Our key idea is to adaptively propagate and aggregate the image context features with variable attenuation over the entire feature maps. To achieve this, we design the spatial attenuation context (SAC) module to recurrently translate and aggregate the context features independently with different attenuation factors and then to attentively learn the weights to adaptively integrate the aggregated context features. By further embedding the module to process individual layers in a deep network, namely SAC-Net, we can train the network end-to-end and optimize the context features for detecting salient objects. Compared with 29 state-of-the-art methods, experimental results show that our method performs favorably over all the others on six common benchmark data, both quantitatively and visually.