U2-Net
U2-Net
**U2-Net** is a two-level nested U-structure architecture that is designed for salient object detection (SOD).  The architecture allows the network to go deeper, attain high resolution, without significantly increasing the memory and computation cost. This is achieved by a nested U-structure: on the bottom level, with a novel ReSidual U-block (RSU) module, which is able to extract intra-stage multi-scale features without degrading the feature map resolution; on the top level, there is a [U-Net](https://paperswithcode.com/method/u-net) like structure, in which each stage is filled by a RSU block.
U$^2$-Net: Going Deeper with Nested U-Structure for Salient Object Detection
https://paperswithcode.com/paper/u-2-net-going-deeper-with-nested-u-structure
U$^2$-Net: Going Deeper with Nested U-Structure for Salient Object Detection