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Xiang An

15 accepted papers

2026

Think with 3D: Geometric Imagination Grounded Spatial Reasoning from Limited Views

CVPR 2026

Though recent advances in vision-language models (VLMs) have achieved remarkable progress across a wide range of multimodal tasks, understanding 3D spatial relationships from limited views remains a significant challenge. Previous reasoning methods typically rely on pure text (e.g., topological cogn

Cited by 0SourcecodeScholar
2026

Towards Streaming Referring Video Segmentation via Large Language Model

CVPR 2026

Current referring video segmentation methods typically operate in an offline manner, where sparse frames are first selected for image-level referring segmentation, and the resulting masks are then propagated across the video. Although video sampling captures global context, its isolated processing s

Cited by 0SourcecodeScholar
2026

UniME-V2: MLLM-as-a-Judge for Universal Multimodal Embedding Learning

AAAI 2026technical

Universal multimodal embedding models are essential in various tasks. Existing approaches typically use in-batch mining to identify hard negatives by measuring the similarity of query-candidate pairs. However, these methods often struggle to capture subtle semantic differences among candidates and l

Cited by 0SourcePDFScholar
2026

ViCToR: Improving Visual Comprehension via Token Reconstruction for Pretraining LMMs

AAAI 2026technical

Large Multimodal Models (LMMs) often face a modality representation gap during pretraining: while language embeddings remain stable, visual representations are highly sensitive to contextual noise (e.g., background clutter). To address this issue, we introduce a visual comprehension stage, which we

Cited by 0SourcePDFScholar
2025

CLIP-CID: Efficient CLIP Distillation via Cluster-Instance Discrimination

AAAI 2025technical

Contrastive Language-Image Pre-training (CLIP) has achieved excellent performance over a wide range of tasks. However, the effectiveness of CLIP heavily relies on a substantial corpus of pre-training data, resulting in notable consumption of computational resources. Although knowledge distillation h…

Cited by 5SourcePDFScholar
2025

ForCenNet: Foreground-Centric Network for Document Image Rectification

ICCV 2025poster

Document image rectification aims to eliminate geometric deformation in photographed documents to facilitate text recognition. However, existing methods often neglect the significance of foreground elements, which provide essential geometric references and layout information for document image corre…

2025

Gradient-Attention Guided Dual-Masking Synergetic Framework for Robust Text-based Person Retrieval

EMNLP 2025

Although Contrastive Language-Image Pre-training (CLIP) exhibits strong performance across diverse vision tasks, its application to person representation learning faces two critical challenges: (i) the scarcity of large-scale annotated vision-language data focused on person-centric images, and (ii)

2025

HUST: High-Fidelity Unbiased Skin Tone Estimation via Texture Quantization

ICCV 2025poster

Recent 3D facial reconstruction methods have made significant progress in shape estimation, but high-fidelity unbiased facial albedo estimation remains challenging. Existing methods rely on expensive light-stage captured data, and while they have made progress in either high-fidelity reconstruction…

2025

Region-based Cluster Discrimination for Visual Representation Learning

ICCV 2025poster

Learning visual representations is foundational for a broad spectrum of downstream tasks. Although recent vision-language contrastive models, such as CLIP and SigLIP, have achieved impressive zero-shot performance via large-scale vision-language alignment, their reliance on global representations co…

2025

UniViT: Unifying Image and Video Understanding in One Vision Encoder

NeurIPS 2025poster

Despite the impressive progress of recent pretraining methods on multimodal tasks, existing methods are inherently biased towards either spatial modeling (e.g., CLIP) or temporal modeling (e.g., V-JEPA), limiting their joint capture of spatial details and temporal dynamics. To this end, we propose U…

Cited by 0SourceScholar
2024

Multi-Label Cluster Discrimination for Visual Representation Learning

ECCV 2024poster

"Contrastive Language Image Pre-training (CLIP) has recently demonstrated success across various tasks due to superior feature representation empowered by image-text contrastive learning. However, the instance discrimination method used by CLIP can hardly encode the semantic structure of training da…

2024

RWKV-CLIP: A Robust Vision-Language Representation Learner

EMNLP 2024main

Contrastive Language-Image Pre-training (CLIP) has significantly improved performance in various vision-language tasks by expanding the dataset with image-text pairs obtained from the web. This paper further explores CLIP from the perspectives of data and model architecture. To mitigate the impact o…

2023

ALIP: Adaptive Language-Image Pre-Training with Synthetic Caption

ICCV 2023poster

Contrastive Language-Image Pre-training (CLIP) has significantly boosted the performance of various vision-language tasks by scaling up the dataset with image-text pairs collected from the web. However, the presence of intrinsic noise and unmatched image-text pairs in web data can potentially affect…

Cited by 54PDFcodeScholar
2023

Unicom: Universal and Compact Representation Learning for Image Retrieval

ICLR 2023poster

Modern image retrieval methods typically rely on fine-tuning pre-trained encoders to extract image-level descriptors. However, the most widely used models are pre-trained on ImageNet-1K with limited classes. The pre-trained feature representation is therefore not universal enough to generalize well…

2022

Killing Two Birds With One Stone: Efficient and Robust Training of Face Recognition CNNs by Partial FC

CVPR 2022poster

Learning discriminative deep feature embeddings by using million-scale in-the-wild datasets and margin-based softmax loss is the current state-of-the-art approach for face recognition. However, the memory and computing cost of the Fully Connected (FC) layer linearly scales up to the number of identi…

Cited by 104PDFcodeScholar