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Xiujun Li

11 accepted papers

2025

Benchmarking Vision Language Model Unlearning via Fictitious Facial Identity Dataset

ICLR 2025poster

Machine unlearning has emerged as an effective strategy for forgetting specific information in the training data. However, with the increasing integration of visual data, privacy concerns in Vision Language Models (VLMs) remain underexplored. To address this, we introduce Facial Identity Unlearning…

2025

Ferret-UI 2: Mastering Universal User Interface Understanding Across Platforms

ICLR 2025poster

Building a generalist model for user interface (UI) understanding is challenging due to various foundational issues, such as platform diversity, resolution variation, and data limitation. In this paper, we introduce Ferret-UI 2, a multimodal large language model (MLLM) designed for universal UI unde…

Cited by 0SourcePDFScholar
2025

Multimodal Autoregressive Pre-training of Large Vision Encoders

CVPR 2025highlight

We introduce a novel method for pre-training of large-scale vision encoders. Building on recent advancements in autoregressive pre-training of vision models, we extend this framework to a multimodal setting, i.e., images and text. In this paper, we present AIMV2, a family of generalist vision encode…

2023

LLMScore: Unveiling the Power of Large Language Models in Text-to-Image Synthesis Evaluation

NeurIPS 2023poster

Existing automatic evaluation on text-to-image synthesis can only provide an image-text matching score, without considering the object-level compositionality, which results in poor correlation with human judgments. In this work, we propose LLMScore, a new framework that offers evaluation scores with…

2021

VinVL: Revisiting Visual Representations in Vision-Language Models

CVPR 2021poster

This paper presents a detailed study of improving vision features and develops an improved object detection model for vision language (VL) tasks. Compared to the most widely used bottom-up and top-down model [2], the new model is bigger, pre-trained on much larger training corpora that combine multi…

Cited by 1156PDFcodeScholar
2020

Oscar: Object-Semantics Aligned Pre-training for Vision-Language Tasks

ECCV 2020poster

Large-scale pre-training methods of learning cross-modal representations on image-text pairs are becoming popular for vision-language tasks. While existing methods simply concatenate image region features and text features as input to the model to be pre-trained and use self-attention to learn image…

2020

Towards Learning a Generic Agent for Vision-and-Language Navigation via Pre-Training

CVPR 2020poster

Learning to navigate in a visual environment following natural-language instructions is a challenging task, because the multimodal inputs to the agent are highly variable, and the training data on a new task is often limited. In this paper, we present the first pre-training and fine-tuning paradigm…

Cited by 320PDFcodeScholar
2019

Tactical Rewind: Self-Correction via Backtracking in Vision-And-Language Navigation

CVPR 2019oral

We present the Frontier Aware Search with backTracking (FAST) Navigator, a general framework for action decoding, that achieves state-of-the-art results on the 2018 Room-to-Room (R2R) Vision-and-Language navigation challenge. Given a natural language instruction and photo-realistic image views of a…

Cited by 194PDFcodeScholar
2018

Adversarial Advantage Actor-Critic Model for Task-Completion Dialogue Policy Learning

ICASSP 2018accepted

This paper presents a new method - adversarial advantage actor-critic (Adversarial A2C), which significantly improves the efficiency of dialogue policy learning in task-completion dialogue systems. Inspired by generative adversarial networks (GAN), we train a discriminator to differentiate responses…

Cited by 0SourceScholar
2018

Generating Informative and Diverse Conversational Responses via Adversarial Information Maximization

NeurIPS 2018poster

Responses generated by neural conversational models tend to lack informativeness and diversity. We present Adversarial Information Maximization (AIM), an adversarial learning framework that addresses these two related but distinct problems. To foster response diversity, we leverage adversarial train…

Cited by 326SourcePDFScholar
2017

End-to-end joint learning of natural language understanding and dialogue manager

ICASSP 2017accepted

Natural language understanding and dialogue policy learning are both essential in conversational systems that predict the next system actions in response to a current user utterance. Conventional approaches aggregate separate models of natural language understanding (NLU) and system action predictio…

Cited by 0SourceScholar