Given a group of images, co-salient object detection (CoSOD) aims to highlight the common salient object in each image. There are two factors closely related to the success of this task, namely consensus extraction, and the dispersion of consensus to each image. Most previous works represent the group consensus using local features, while we instead utilize a hierarchical Transformer module for extracting semantic-level consensus. Therefore, it can obtain a more comprehensive representation of the common object category, and exclude interference from other objects that share local similarities with the target object. In addition, we propose a Transformer-based dispersion module that takes into account the variation of the co-salient object in different scenes. It distributes the consensus to the image feature maps in an image-specific way while making full use of interactions within the group. These two modules are integrated with a ViT encoder and an FPN-like decoder to form an end-to-end trainable network, without additional branch and auxiliary loss. The proposed method is evaluated on three commonly used CoSOD datasets and achieves state-of-the-art performance.

给定一组图像，合作显著目标检测（CoSOD）的目标是突出显示每个图像中的共同显著对象。本文提出了一种基于分层Transformer模块的方法，用于提取语义级共识，以获得对公共对象类别更全面的表示，并排除与目标对象具有局部相似性的其他对象的干扰。此外，还提出了一种基于Transformer的分散模块，它考虑了不同场景中协同显著对象的变化。它以图像特征图的图像特定方式对共识进行分发，同时充分利用组内的交互。这两个模块与ViT编码器和类似FPN的解码器一起集成成一个可端到端训练的网络，不需要额外的分支和辅助损失。该方法在三个常用的CoSOD数据集上进行评估，并取得了最先进的性能。

带有语义级别共识提取和分散的共显目标检测