Multi-Perspective Video Captioning

This work targets at the problems of comprehensive video captioning and the generation of multiple descriptions from different perspectives, termed as Multi-Perspective Video Captioning. We build and release a dataset named VidOR-MPVC, the first dataset for multi-perspective video captioning, where each video is annotated with multiple descriptions from different perspectives. We also propose a novel model, dubbed perspective-aware captioner (PAC), which is capable of mining the various perspectives in a video and generating a description from each perspective. More specifically, a perspective generator is designed to perceive video content with perspective preferences, and followed by a language generator equipped with perspective-aware attention mechanism. As our new task expects to produce multiple descriptions for a video, existing evaluation metrics are fail to handle this situation. To address this problem, we devise the maximum matching scores based on existing metrics for an overall evaluation which aims to cover the aspects of semantic similarity, completeness and compactness. The experimental results demonstrate that our model is able to describe videos with multiple descriptions from different perspectives.