MVP-SEG: Multi-View Prompt Learning for Open-Vocabulary Semantic Segmentation

• URL: http://arxiv.org/abs/2304.06957v1
• Date: Fri, 14 Apr 2023 07:01:47 GMT
• Title: MVP-SEG: Multi-View Prompt Learning for Open-Vocabulary Semantic Segmentation
• Authors: Jie Guo, Qimeng Wang, Yan Gao, Xiaolong Jiang, Xu Tang, Yao Hu, Baochang Zhang
• Abstract summary: We first demonstrate the necessity of image-pixel CLIP feature adaption, then provide Multi-View Prompt learning (MVP-SEG) MVP-SEG is an effective solution to achieve image-pixel adaptation and to solve open-vocabulary semantic segmentation. Experiments show that the multi-view prompts learned from seen categories have strong generalization to unseen categories.
• Score: 44.28355088831045
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: CLIP (Contrastive Language-Image Pretraining) is well-developed for open-vocabulary zero-shot image-level recognition, while its applications in pixel-level tasks are less investigated, where most efforts directly adopt CLIP features without deliberative adaptations. In this work, we first demonstrate the necessity of image-pixel CLIP feature adaption, then provide Multi-View Prompt learning (MVP-SEG) as an effective solution to achieve image-pixel adaptation and to solve open-vocabulary semantic segmentation. Concretely, MVP-SEG deliberately learns multiple prompts trained by our Orthogonal Constraint Loss (OCLoss), by which each prompt is supervised to exploit CLIP feature on different object parts, and collaborative segmentation masks generated by all prompts promote better segmentation. Moreover, MVP-SEG introduces Global Prompt Refining (GPR) to further eliminate class-wise segmentation noise. Experiments show that the multi-view prompts learned from seen categories have strong generalization to unseen categories, and MVP-SEG+ which combines the knowledge transfer stage significantly outperforms previous methods on several benchmarks. Moreover, qualitative results justify that MVP-SEG does lead to better focus on different local parts.

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