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Keqiang Sun

15 accepted papers

2026

Self-NPO: Data-Free Diffusion Model Enhancement via Truncated Diffusion Fine-Tuning

AAAI 2026technical

Diffusion models have demonstrated remarkable success in various visual generation tasks, including image, video, and 3D content generation. Preference optimization (PO) is a prominent and growing area of research that aims to align these models with human preferences. While existing PO methods prim

Cited by 0SourcePDFScholar
2025

Diffusion-NPO: Negative Preference Optimization for Better Preference Aligned Generation of Diffusion Models

ICLR 2025poster

Diffusion models have made substantial advances in image generation, yet models trained on large, unfiltered datasets often yield outputs misaligned with human preferences. Numerous methods have already been proposed to fine-tune pre-trained diffusion models, achieving notable improvements in aligni…

2025

InstantPortrait: One-Step Portrait Editing via Diffusion Multi-Objective Distillation

ICLR 2025poster

Real-time instruction-based portrait image editing is crucial in various applications, including filters, augmented reality, and video communications, etc. However, real-time portrait editing presents three significant challenges: identity preservation, fidelity to editing instructions, and fast mod…

Cited by 0SourcePDFScholar
2025

Storynizor: Consistent Story Generation via Inter-Frame Synchronized and Shuffled ID Injection

AAAI 2025technical

Recent advances in text-to-image diffusion models have spurred significant interest in continuous story image generation. In this paper, we introduce Storynizor, a model capable of generating coherent stories with strong inter-frame character consistency, effective foreground-background separation,…

Cited by 1SourcePDFScholar
2024

"BlinkVision: A Benchmark for Optical Flow, Scene Flow and Point Tracking Estimation using RGB Frames and Events"

ECCV 2024poster

"Recent advances in event-based vision suggest that they complement traditional cameras by providing continuous observation without frame rate limitations and high dynamic range which are well-suited for correspondence tasks such as optical flow and point tracking. However, so far there is still a l…

Cited by 4SourcePDFScholar
2024

Deep Reward Supervisions for Tuning Text-to-Image Diffusion Models

ECCV 2024poster

"Optimizing a text-to-image diffusion model with a given reward function is an important but underexplored research area. In this study, we propose Deep Reward Tuning (DRTune), an algorithm that directly supervises the final output image of a text-to-image diffusion model and back-propagates through…

Cited by 14SourcePDFScholar
2024

Phased Consistency Models

NeurIPS 2024poster

Consistency Models (CMs) have made significant progress in accelerating the generation of diffusion models. However, their application to high-resolution, text-conditioned image generation in the latent space remains unsatisfactory. In this paper, we identify three key flaws in the current design of…

2024

Ponymation: Learning Articulated 3D Animal Motions from Unlabeled Online Videos

ECCV 2024poster

"We introduce a new method for learning a generative model of articulated 3D animal motions from raw, unlabeled online videos. Unlike existing approaches for 3D motion synthesis, our model requires no pose annotations or parametric shape models for training; it learns purely from a collection of unl…

Cited by 3SourcePDFScholar
2023

Human Preference Score: Better Aligning Text-to-Image Models with Human Preference

ICCV 2023poster

Recent years have witnessed a rapid growth of deep generative models, with text-to-image models gaining significant attention from the public. However, existing models often generate images that do not align well with human preferences, such as awkward combinations of limbs and facial expressions. T…

Cited by 122PDFcodeScholar
2023

NDC-Scene: Boost Monocular 3D Semantic Scene Completion in Normalized Device Coordinates Space

ICCV 2023poster

Monocular 3D Semantic Scene Completion (SSC) has garnered significant attention in recent years due to its potential to predict complex semantics and geometry shapes from a single image, requiring no 3D inputs. In this paper, we identify several critical issues in current state-of-the-art methods, i…

Cited by 174PDFcodeScholar
2022

Controllable 3D Face Synthesis with Conditional Generative Occupancy Fields

NeurIPS 2022accept

Capitalizing on the recent advances in image generation models, existing controllable face image synthesis methods are able to generate high-fidelity images with some levels of controllability, e.g., controlling the shapes, expressions, textures, and poses of the generated face images. However, thes…

Cited by 44SourcePDFScholar
2021

Inverting Generative Adversarial Renderer for Face Reconstruction

CVPR 2021poster

Given a monocular face image as input, 3D face geometry reconstruction aims to recover a corresponding 3Dface mesh. Recently, both optimization-based and learning-based face reconstruction methods have taken advantage of the emerging differentiable renderer and shown promising results. However, the…

Cited by 35PDFScholar
2019

Aggregation via Separation: Boosting Facial Landmark Detector With Semi-Supervised Style Translation

ICCV 2019poster

Facial landmark detection, or face alignment, is a fundamental task that has been extensively studied. In this paper, we investigate a new perspective of facial landmark detection and demonstrate it leads to further notable improvement. Given that any face images can be factored into space of style…

Cited by 102PDFcodeScholar
2019

FAB: A Robust Facial Landmark Detection Framework for Motion-Blurred Videos

ICCV 2019poster

Recently, facial landmark detection algorithms have achieved remarkable performance on static images. However, these algorithms are neither accurate nor stable in motion-blurred videos. The missing of structure information makes it difficult for state-of-the-art facial landmark detection algorithms…

Cited by 44PDFcodeScholar