Exploit CAM by itself: Complementary Learning System for Weakly Supervised Semantic Segmentation

• URL: http://arxiv.org/abs/2303.02449v1
• Date: Sat, 4 Mar 2023 16:16:47 GMT
• Title: Exploit CAM by itself: Complementary Learning System for Weakly Supervised Semantic Segmentation
• Authors: Jiren Mai and Fei Zhang and Junjie Ye and Marcus Kalander and Xian Zhang and WanKou Yang and Tongliang Liu and Bo Han
• Abstract summary: This paper turns to an interesting working mechanism in agent learning named Complementary Learning System ( CLS) Motivated by this simple but effective learning pattern, we propose a General-Specific Learning Mechanism (GSLM) GSLM develops a General Learning Module (GLM) and a Specific Learning Module (SLM)
• Score: 59.24824050194334
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Weakly Supervised Semantic Segmentation (WSSS) with image-level labels has long been suffering from fragmentary object regions led by Class Activation Map (CAM), which is incapable of generating fine-grained masks for semantic segmentation. To guide CAM to find more non-discriminating object patterns, this paper turns to an interesting working mechanism in agent learning named Complementary Learning System (CLS). CLS holds that the neocortex builds a sensation of general knowledge, while the hippocampus specially learns specific details, completing the learned patterns. Motivated by this simple but effective learning pattern, we propose a General-Specific Learning Mechanism (GSLM) to explicitly drive a coarse-grained CAM to a fine-grained pseudo mask. Specifically, GSLM develops a General Learning Module (GLM) and a Specific Learning Module (SLM). The GLM is trained with image-level supervision to extract coarse and general localization representations from CAM. Based on the general knowledge in the GLM, the SLM progressively exploits the specific spatial knowledge from the localization representations, expanding the CAM in an explicit way. To this end, we propose the Seed Reactivation to help SLM reactivate non-discriminating regions by setting a boundary for activation values, which successively identifies more regions of CAM. Without extra refinement processes, our method is able to achieve breakthrough improvements for CAM of over 20.0% mIoU on PASCAL VOC 2012 and 10.0% mIoU on MS COCO 2014 datasets, representing a new state-of-the-art among existing WSSS methods.

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