Exploring vision transformer layer choosing for semantic segmentation

Extensive work has demonstrated the effectiveness of Vision Transformer. The plain Vision Transformer tends to obtain multi-scale features by selecting fixed layers, or the last layer of features aiming to achieve higher performance in dense prediction tasks. However, this selection is often based on manual operation. And different samples often exhibit different features at different layers (e.g., edge, structure, texture, detail, etc.). This requires us to seek a dynamic adaptive fusion method to filter different layer features. In this paper, unlike previous encoder and decoder work, we design a neck network for adaptive fusion and feature selection, called ViTController. We validate the effectiveness of our method on different datasets and models, and surpass previous state-of-the-art methods. Finally our method can also be used as a plug-in module and inserted into different networks.