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Chaochen Gu

7 accepted papers

2026

Hallucination Begins Where Saliency Drops

ICLR 2026oral

Recent studies have investigated attention dynamics in large vision language models (LVLMs), yet existing methods remain limited in reliably distinguishing hallucinated from correct outputs — primarily because they rely solely on forward-pass attention, ignoring gradient-based signals that reveal ho…

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2026

Illuminating Visual Identity in Universal Multimodal Embeddings

CVPR 2026

Universal Multimodal Embeddings (UMEs) aim to unify various modalities and tasks into a shared representation space. In recent years, this field has witnessed substantial progress driven by the development of Multimodal Large Language Models (MLLMs). However, a crucial capability, visual identity di

Cited by 0SourcecodeScholar
2025

EFDTR: Learnable Elliptical Fourier Descriptor Transformer for Instance Segmentation

ICML 2025poster

Polygon-based object representations efficiently model object boundaries but are limited by high optimization complexity, which hinders their adoption compared to more flexible pixel-based methods. In this paper, we introduce a novel vertex regression loss grounded in Fourier elliptic descriptors,…

2025

From Redundancy to Relevance: Information Flow in LVLMs Across Reasoning Tasks

NAACL 2025long

Large Vision Language Models (LVLMs) achieve great performance on visual-language reasoning tasks, however, the black-box nature of LVLMs hinders in-depth research on the reasoning mechanism. As all images need to be converted into image tokens to fit the input format of large language models (LLMs)…

2025

Shallow Focus, Deep Fixes: Enhancing Shallow Layers Vision Attention Sinks to Alleviate Hallucination in LVLMs

EMNLP 2025

Multimodal large language models (MLLMs) demonstrate excellent abilities for understanding visual information, while the hallucination remains. Albeit image tokens constitute the majority of the MLLMs input, the relation between image tokens and hallucinations is still unexplored. In this paper, we

Cited by 0SourcePDFScholar
2023

Self-Supervised Implicit Glyph Attention for Text Recognition

CVPR 2023poster

The attention mechanism has become the de facto module in scene text recognition (STR) methods, due to its capability of extracting character-level representations. These methods can be summarized into implicit attention based and supervised attention based, depended on how the attention is computed…

2021

Complementary Patch for Weakly Supervised Semantic Segmentation

ICCV 2021poster

Weakly Supervised Semantic Segmentation (WSSS) based on image-level labels has been greatly advanced by exploiting the outputs of Class Activation Map (CAM) to generate the pseudo labels for semantic segmentation. However, CAM merely discovers seeds from a small number of regions, which may be insuf…

Cited by 172PDFcodeScholar