Stacked Self-Attention Networks for Visual Question Answering

Given a photograph, the task of Visual Question Answering (VQA) requires joint image and language understanding to answer a question. It is challenging in effectively extracting the visual representation of images, and efficiently embedding the textual sentences of questions. To address these challenges, we propose a VQA model that utilizes the stacked self-attention for visual understanding, and the BERT-based question embedding model. Particularly, the stacked self-attention mechanism proposed enables the model to not only focus on a simple object but also the relations between objects. Furthermore, the BERT model is learned in an end-to-end manner to better embed the question sentences. Our model is validated on the well-known VQA v2.0 dataset, and achieves the state-of-the-art results.