A deep low-rank semantic factorization method for micro-video multi-label classification

As a prominent manifestation of user-generated content (UGC), micro-video has emerged as a pivotal medium for individuals to document and disseminate their daily experiences. In particular, micro-videos generally encompass abundant content elements that are abstractly described by a group of annotated labels. However, previous methods primarily focus on the discriminability of explicit labels while neglecting corresponding implicit semantics, which are particularly relevant for diverse micro-video characteristics. To address this problem, we develop a deep low-rank semantic factorization (DLRSF) method to perform multi-label classification of micro-videos. Specifically, we introduce a semantic embedding matrix to bridge explicit labels and implicit semantics, and further present a low-rank-regularized semantic learning module to explore the intrinsic lowest-rank semantic attributes. A correlation-driven deep semantic interaction module is designed within a deep factorization framework to enhance interactions among instance features, explicit labels and semantic embeddings. Additionally, inverse covariance analysis is employed to unveil underlying correlation structures between labels and features, thereby making the semantic embeddings more discriminative and improving model generalization ability simultaneously. Extensive experimental results on three available datasets have showcased the superiority of our DLRSF compared with the state-of-the-art methods.