Boosting Cross-Modal Retrieval With MVSE++ and Reciprocal Neighbors

In this paper, we propose to boost the cross-modal retrieval through mutually aligning images and captions on the aspects of both features and relationships. First, we propose a multi-feature based visual-semantic embedding (MVSE++) space to retrieve the candidates in another modality, which provides a more comprehensive representation of the visual content of objects and scene context in images. Thus, we have more potential to find a more accurate and detailed caption for the image. However, captioning concentrates the image contents by semantic description. The cross-modal neighboring relationships start from the visual and semantic sides are asymmetric. To retrieve a better cross-modal neighbor, we propose to re-rank the initially retrieved candidates according to the ${k}$ nearest reciprocal neighbors in MVSE++ space. The method is evaluated on the benchmark datasets of MSCOCO and Flickr30K with standard metrics. We achieve highe accuracy in caption retrieval and image retrieval at both R@1 and R@10.