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Jiajun Tang

11 accepted papers

2025

Hybrid Mesh-Gaussian Representation for Efficient Indoor Scene Reconstruction

IJCAI 2025

3D Gaussian splatting (3DGS) has demonstrated exceptional performance in image-based 3D reconstruction and real-time rendering. However, regions with complex textures require numerous Gaussians to capture significant color variations accurately, leading to inefficiencies in rendering speed. To addre

Cited by 0SourcePDFScholar
2025

SpecTRe-GS: Modeling Highly Specular Surfaces with Reflected Nearby Objects by Tracing Rays in 3D Gaussian Splatting

CVPR 2025highlight

3D Gaussian Splatting (3DGS), a recently emerged multi-view 3D reconstruction technique, has shown significant advantages in real-time rendering and explicit editing. However, 3DGS encounters challenges in the accurate modeling of both high-frequency view-dependent appearances and global illuminatio…

Cited by 0SourcePDFScholar
2024

Improved algorithm and bounds for successive projection

ICLR 2024poster

Consider a $K$-vertex simplex in a $d$-dimensional space. We measure $n$ points on the simplex, but due to the measurement noise, some of the observed points fall outside the simplex. The interest is vertex hunting (i.e., estimating the vertices of the simplex). The successive projection algorit…

2024

VMINer: Versatile Multi-view Inverse Rendering with Near- and Far-field Light Sources

CVPR 2024highlight

This paper introduces a versatile multi-view inverse rendering framework with near- and far-field light sources. Tackling the fundamental challenge of inherent ambiguity in inverse rendering our framework adopts a lightweight yet inclusive lighting model for different near- and far-field lights thus…

Cited by 0SourcePDFScholar
2023

Complementary Intrinsics From Neural Radiance Fields and CNNs for Outdoor Scene Relighting

CVPR 2023poster

Relighting an outdoor scene is challenging due to the diverse illuminations and salient cast shadows. Intrinsic image decomposition on outdoor photo collections could partly solve this problem by weakly supervised labels with albedo and normal consistency from multi-view stereo. With neural radiance…

Cited by 9SourcePDFScholar
2023

LuminAIRe: Illumination-Aware Conditional Image Repainting for Lighting-Realistic Generation

NeurIPS 2023poster

We present the ilLumination-Aware conditional Image Repainting (LuminAIRe) task to address the unrealistic lighting effects in recent conditional image repainting (CIR) methods. The environment lighting and 3D geometry conditions are explicitly estimated from given background images and parsing mask…

Cited by 5SourcePDFScholar
2022

Estimating Spatially-Varying Lighting in Urban Scenes with Disentangled Representation

ECCV 2022poster

"We present an end-to-end network for spatially-varying outdoor lighting estimation in urban scenes given a single limited field-of-view LDR image and any assigned 2D pixel position. We use three disentangled latent spaces learned by our network to represent sky light, sun light, and lighting-indepe…

Cited by 15SourcePDFScholar
2022

L-CoDe:Language-Based Colorization Using Color-Object Decoupled Conditions

AAAI 2022technical

Colorizing a grayscale image is inherently an ill-posed problem with multi-modal uncertainty. Language-based colorization offers a natural way of interaction to reduce such uncertainty via a user-provided caption. However, the color-object coupling and mismatch issues make the mapping from word to c…

Cited by 41SourcePDFScholar
2022

Unsupervised Representation for Semantic Segmentation by Implicit Cycle-Attention Contrastive Learning

AAAI 2022technical

We study the unsupervised representation learning for the semantic segmentation task. Different from previous works that aim at providing unsupervised pre-trained backbones for segmentation models which need further supervised fine-tune, here, we focus on providing representation that is only traine…

Cited by 11SourcePDFScholar
2020

Asynchronous Interaction Aggregation for Action Detection

ECCV 2020poster

Understanding interaction is an essential part of video action detection. We propose the Asynchronous Interaction Aggregation network (AIA) that leverages different interactions to boost action detection. There are two key designs in it: one is the Interaction Aggregation structure (IA) adopting a u…

2019

Generating Diverse and Descriptive Image Captions Using Visual Paraphrases

ICCV 2019poster

Recently there has been significant progress in image captioning with the help of deep learning. However, captions generated by current state-of-the-art models are still far from satisfactory, despite high scores in terms of conventional metrics such as BLEU and CIDEr. Human-written captions are div…

Cited by 50PDFScholar