LAEO-Net++: revisiting people Looking At Each Other in videos
This work addresses the problem of automatically detecting mutual gaze in videos, which is crucial for understanding social interactions, benefiting researchers in human-computer interaction and social behavior analysis.
This paper tackles the problem of detecting mutual gaze (people Looking At Each Other, LAEO) in video sequences. The proposed LAEO-Net++ model, which takes spatio-temporal tracks as input, achieves state-of-the-art results on the TVHID-LAEO dataset, significantly outperforming previous approaches.
Capturing the 'mutual gaze' of people is essential for understanding and interpreting the social interactions between them. To this end, this paper addresses the problem of detecting people Looking At Each Other (LAEO) in video sequences. For this purpose, we propose LAEO-Net++, a new deep CNN for determining LAEO in videos. In contrast to previous works, LAEO-Net++ takes spatio-temporal tracks as input and reasons about the whole track. It consists of three branches, one for each character's tracked head and one for their relative position. Moreover, we introduce two new LAEO datasets: UCO-LAEO and AVA-LAEO. A thorough experimental evaluation demonstrates the ability of LAEO-Net++ to successfully determine if two people are LAEO and the temporal window where it happens. Our model achieves state-of-the-art results on the existing TVHID-LAEO video dataset, significantly outperforming previous approaches. Finally, we apply LAEO-Net++ to a social network, where we automatically infer the social relationship between pairs of people based on the frequency and duration that they LAEO, and show that LAEO can be a useful tool for guided search of human interactions in videos. The code is available at https://github.com/AVAuco/laeonetplus.