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Improve image segmentation by identifying and relabeling out-of-candidate pixels with OCR

Improve image segmentation by identifying and relabeling out-of-candidate pixels with OCR


Out-of-Candidate Rectification for Weakly Supervised Semantic Segmentation

arXiv paper abstract https://arxiv.org/abs/2211.12268



Weakly supervised semantic segmentation is typically inspired by class activation maps, which serve as pseudo masks with class-discriminative regions highlighted.


... existing methods still commonly suffer from the unsolicited Out-of-Candidate (OC) error predictions that not belongs to the label candidates, which could be avoidable since the contradiction with image-level class tags is easy to be detected.


... develop a group ranking-based Out-of-Candidate Rectification (OCR) mechanism in a plug-and-play fashion.


Firstly, ... adaptively split the semantic categories into In-Candidate (IC) and OC groups for each OC pixel according to their prior annotation correlation and posterior prediction correlation.


Then, ... derive a differentiable rectification loss to force OC pixels to shift to the IC group.


... OCR ... can achieve remarkable performance gains on both Pascal VOC ... and MS COCO ... datasets with negligible extra training overhead ...



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