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Shan Zhang

26 accepted papers

2026

Artemis: Structured Visual Reasoning for Perception Policy Learning

ICML 2026poster

Recent reinforcement-learning frameworks for visual perception policy usually incorporate intermediate reasoning chains expressed in natural language. Empirical observations indicate that such purely linguistic intermediate reasoning often reduces performance on perception tasks. We argue that the c…

Cited by 0SourceScholar
2026

FiSeR: Fine-Grained Source Representations for Cross-Domain AI Image Detection

ICML 2026poster

Real-world synthetic image detectors often generalize poorly under domain shift despite strong in-domain performance. Using unsupervised UMAP projections, we find that natural and synthetic features remain partially separable on unseen datasets, yet performance still drops, suggesting that the class…

Cited by 0SourceScholar
2026

Hierarchical Process Reward Models are Symbolic Vision Learners

CVPR 2026

Symbolic computer vision represents diagrams through explicit logical rules and structured representations, enabling interpretable understanding in machine vision. This requires fundamentally different learning paradigms from pixel-based visual models. Symbolic visual learners parse diagrams into ge

Cited by 0SourceScholar
2026

MLLM Enriched Explainable Multiple Clustering

AAAI 2026technical

Multiple clustering aims to uncover diverse latent structures within the data, enabling a more comprehensive understanding of complex datasets. However, existing approaches either heavily rely on user-supplied keywords or disregard user-interested clustering types, limiting the ability to discover t

Cited by 0SourcePDFScholar
2026

Math Blind: Failures in Diagram Understanding Undermine Reasoning in MLLMs

ICLR 2026poster

Diagrams represent a form of visual language that encodes abstract concepts and relationships through structured symbols and their spatial arrangements. Unlike natural images, they are inherently symbolic, and entirely artificial. They thus pose unique challenges for Multimodal Large Language Model…

Cited by 0SourceScholar
2026

ViLoMem: Agentic Learner with Grow-and-Refine Multimodal Semantic Memory

CVPR 2026

MLLMs exhibit strong reasoning on isolated queries, yet they operate de novo--solving each problem independently and often repeating the same mistakes. Existing memory-augmented agents mainly store past trajectories for reuse. However, trajectory-based memory suffers from brevity bias, gradually los

Cited by 0SourcecodeScholar
2025

Aligning Contrastive Multiple Clusterings with User Interests

IJCAI 2025

Multiple clustering approaches aim to partition complex data in different ways. These methods often exhibit a one-to-many relationship in their results, and relying solely on the data context may be insufficient to capture the patterns relevant to the user. User’s expectation is key for the multiple

Cited by 0SourcePDFScholar
2025

DETree: DEtecting Human-AI Collaborative Texts via Tree-Structured Hierarchical Representation Learning

NeurIPS 2025poster

Detecting AI-involved text is essential for combating misinformation, plagiarism, and academic misconduct. However, AI text generation includes diverse collaborative processes (AI-written text edited by humans, human-written text edited by AI, and AI-generated text refined by other AI), where vario…

Cited by 0SourcecodeScholar
2025

Empowering Educators in AI: Insights from Co-Designing an AI Microcredential with and for K-12 Educators

AAAI 2025technical

This paper examines the co-design process for a foundational AI microcredential course targeting K-12 teachers' knowledge, agency, and effectiveness in integrating AI into their classrooms. We collaborated with six K-12 teachers and instructional coaches to ensure the course's relevance and practica…

Cited by 0SourcePDFScholar
2025

Open-World Objectness Modeling Unifies Novel Object Detection

CVPR 2025poster

The challenge in open-world object detection, similarly to few- and zero-shot learning, is to generalize beyond the class distribution of the training data. In this paper, we propose a general class-agnostic objectness measure to limit bias toward labeled samples. One issue in open-world detection…

Cited by 1SourcePDFScholar
2025

Primitive Vision: Improving Diagram Understanding in MLLMs

ICML 2025poster

Mathematical diagrams have a distinctive structure. Standard feature transforms designed for natural images (e.g., CLIP) fail to process them effectively, limiting their utility in multimodal large language models (MLLMs). Current efforts to improve MLLMs have primarily focused on scaling mathematic…

2024

DeTeCtive: Detecting AI-generated Text via Multi-Level Contrastive Learning

NeurIPS 2024poster

Current techniques for detecting AI-generated text are largely confined to manual feature crafting and supervised binary classification paradigms. These methodologies typically lead to performance bottlenecks and unsatisfactory generalizability. Consequently, these methods are often inapplicable for…

2024

KCL: Few-shot Named Entity Recognition with Knowledge Graph and Contrastive Learning

COLING 2024main

Named Entity Recognition(NER), as a crucial subtask in natural language processing(NLP), is limited to a few labeled samples(a.k.a. few-shot). Metric-based meta-learning methods aim to learn the semantic space and assign the entity to its nearest label based on the similarity of their representation…

Cited by 3SourcePDFScholar
2024

PACE: Marrying generalization in PArameter-efficient fine-tuning with Consistency rEgularization

NeurIPS 2024spotlight

Parameter-Efficient Fine-Tuning (PEFT) effectively adapts pre-trained transformers to downstream tasks. However, the optimization of tasks performance often comes at the cost of generalizability in fine-tuned models. To address this issue, we theoretically connect smaller weight gradient norms durin…

2024

Semantic-Aware Autoregressive Image Modeling for Visual Representation Learning

AAAI 2024technical

The development of autoregressive modeling (AM) in computer vision lags behind natural language processing (NLP) in self-supervised pre-training. This is mainly caused by the challenge that images are not sequential signals and lack a natural order when applying autoregressive modeling. In this stud…

2024

VRP-SAM: SAM with Visual Reference Prompt

CVPR 2024poster

In this paper we propose a novel Visual Reference Prompt (VRP) encoder that empowers the Segment Anything Model (SAM) to utilize annotated reference images as prompts for segmentation creating the VRP-SAM model. In essence VRP-SAM can utilize annotated reference images to comprehend specific objects…

2023

Group DETR: Fast DETR Training with Group-Wise One-to-Many Assignment

ICCV 2023poster

Detection transformer (DETR) relies on one-to-one assignment, assigning one ground-truth object to one prediction, for end-to-end detection without NMS post-processing. It is known that one-to-many assignment, assigning one ground-truth object to multiple predictions, succeeds in detection methods s…

Cited by 160PDFcodeScholar
2023

Machine Learning Based Early Debris Detection Using Automotive Low Level Radar Data

ICASSP 2023accepted

Road safety for automated vehicles requires accurate and early detection of stationary objects in the vehicle’s path. Radar can use doppler to effectively identify stationary objects and make these identifications at long range and in severe weather and poor light conditions. In this paper, we propo…

Cited by 0SourceScholar
2023

Multi-Mode Online Knowledge Distillation for Self-Supervised Visual Representation Learning

CVPR 2023poster

Self-supervised learning (SSL) has made remarkable progress in visual representation learning. Some studies combine SSL with knowledge distillation (SSL-KD) to boost the representation learning performance of small models. In this study, we propose a Multi-mode Online Knowledge Distillation method (…

Cited by 38SourcePDFScholar
2023

Semantics-Consistent Feature Search for Self-Supervised Visual Representation Learning

ICCV 2023poster

In contrastive self-supervised learning, the common way to learn discriminative representation is to pull different augmented "views" of the same image closer while pushing all other images further apart, which has been proven to be effective. However, it is unavoidable to construct undesirable view…

Cited by 7PDFcodeScholar
2023

Task-adaptive Label Dependency Transfer for Few-shot Named Entity Recognition

ACL 2023findings

Named Entity Recognition (NER), as a crucial subtask in natural language processing (NLP), suffers from limited labeled samples (a.k.a. few-shot). Meta-learning methods are widely used for few-shot NER, but these existing methods overlook the importance of label dependency for NER, resulting in subo…

Cited by 2SourcePDFScholar
2023

s-Adaptive Decoupled Prototype for Few-Shot Object Detection

ICCV 2023poster

Meta-learning-based few-shot detectors use one K-average-pooled prototype (averaging along K-shot dimension) in both Region Proposal Network (RPN) and Detection head (DH) for query detection. Such plain operation would harm the FSOD performance in two aspects: 1) the poor quality of the prototype, a…

Cited by 14PDFScholar
2022

CATrans: Context and Affinity Transformer for Few-Shot Segmentation

IJCAI 2022poster

Few-shot segmentation (FSS) aims to segment novel categories given scarce annotated support images. The crux of FSS is how to aggregate dense correlations between support and query images for query segmentation while being robust to the large variations in appearance and context. To this end, previo…

Cited by 23SourcePDFScholar
2022

Kernelized Few-Shot Object Detection With Efficient Integral Aggregation

CVPR 2022poster

We design a Kernelized Few-shot Object Detector by leveraging kernelized matrices computed over multiple proposal regions, which yield expressive non-linear representations whose model complexity is learned on the fly. Our pipeline contains several modules. An Encoding Network encodes support and qu…

Cited by 79PDFcodeScholar
2022

Time-rEversed diffusioN tEnsor Transformer: A New TENET of Few-Shot Object Detection

ECCV 2022poster

"In this paper, we tackle the challenging problem of Few-shot Object Detection. Existing FSOD pipelines (i) use average-pooled representations that result in information loss; and/or (ii) discard position information that can help detect object instances. Consequently, such pipelines are sensitive t…

2017

On classification of environmental acoustic data using crowds

ICASSP 2017accepted

In this work, we use crowds for acoustic classification of animal species in supervised and unsupervised manners. We demonstrate the effectiveness of the proposed triplet based crowdsourcing systems via actual experiments. Moreover, we propose a generalized 1-bit RPCA algorithm to further improve cl…

Cited by 0SourceScholar