LoveDA: A Remote Sensing Land-Cover Dataset for Domain Adaptive Semantic Segmentation
This work addresses the challenge of model generalizability for city-level or national-level mapping in remote sensing, but it is incremental as it focuses on dataset creation and benchmarking rather than a new method.
The authors tackled the problem of domain adaptation in remote sensing land-cover mapping by introducing the LoveDA dataset, which includes 5987 high-resolution images from urban and rural domains, and benchmarked it on 11 semantic segmentation and 8 UDA methods to advance transferable learning.
Deep learning approaches have shown promising results in remote sensing high spatial resolution (HSR) land-cover mapping. However, urban and rural scenes can show completely different geographical landscapes, and the inadequate generalizability of these algorithms hinders city-level or national-level mapping. Most of the existing HSR land-cover datasets mainly promote the research of learning semantic representation, thereby ignoring the model transferability. In this paper, we introduce the Land-cOVEr Domain Adaptive semantic segmentation (LoveDA) dataset to advance semantic and transferable learning. The LoveDA dataset contains 5987 HSR images with 166768 annotated objects from three different cities. Compared to the existing datasets, the LoveDA dataset encompasses two domains (urban and rural), which brings considerable challenges due to the: 1) multi-scale objects; 2) complex background samples; and 3) inconsistent class distributions. The LoveDA dataset is suitable for both land-cover semantic segmentation and unsupervised domain adaptation (UDA) tasks. Accordingly, we benchmarked the LoveDA dataset on eleven semantic segmentation methods and eight UDA methods. Some exploratory studies including multi-scale architectures and strategies, additional background supervision, and pseudo-label analysis were also carried out to address these challenges. The code and data are available at https://github.com/Junjue-Wang/LoveDA.