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Chengan Che

3 accepted papers

2026

A Stitch in Time: Learning Procedural Workflow via Self-Supervised Plackett-Luce Ranking

CVPR 2026

Procedural activities, ranging from routine cooking to complex surgical operations, are highly structured sequences of actions performed in a specific temporal order. Despite the success of current self-supervised learning (SSL) methods on static images and short clips, these models often overlook t

Cited by 0SourcecodeScholar
2026

Back to the Feature: Explaining Video Classifiers with Video Counterfactual Explanations

CVPR 2026

Counterfactual explanations (CFEs) are minimal and semantically meaningful modifications of the input of a model that alter the model predictions. They highlight the decisive features the model relies on, providing contrastive interpretations for classifiers. State-of-the-art visual counterfactual e

Cited by 0SourcecodeScholar
2026

LEMON: A Large Endoscopic MONocular Dataset and Foundation Model for Perception in Surgical Settings

CVPR 2026

Traditional open-access datasets focusing on surgical procedures are often limited by their small size, typically consisting of fewer than 100 videos and less than 30 hours of footage, which leads to poor model generalization. To address this data limitation, a new dataset called LEMON has been comp

Cited by 0SourcecodeScholar