Abstract
Change detection has been a hot research topic in the field of remote sensing, and it can provide information on observing changes of Earth's surface. However, segmentation-based change results are not very friendly to end users. Thus, in order to improve user experience and offer them high-level semantic information on change detection, we introduce a new task: change-aware visual question answering (VQA) on multi-temporal aerial images. Specifically, given a pair of multi-temporal aerial images and questions, this task aims to automatically provide natural language answers. By doing so, end users have better access to easy-to-understand change information through natural language. Besides, we also create a dataset made of multi-temporal image-question-answer triplets and a baseline method for this task. Experimental results offer valuable insights for the further research on this task.
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