Referring Expression Comprehension via Co-attention and Visual Context

As a research hotspot of multimodal media analysis, referring expression comprehension locates the referred object region in an image by mapping a natural language. Though the localizing accuracy of similar objects is often distorted by the presence or absence of supporting objects in the referring expression, we propose a referring expression comprehension method via co-attention and visual context. For lacking supporting objects in referring expression, we propose co-attention to enhance the attention on attributes for the subject module. For existing supporting objects, we introduce visual context to explore the latent link between the candidate object and its supporters. Experiments on three datasets RefCOCO, RefCOCO+, and RefCOCOg, show that our approach outperforms published approaches by a considerable margin.