Search Results for author: Amit Raj

Found 21 papers, 6 papers with code

DiffusionLight: Light Probes for Free by Painting a Chrome Ball

1 code implementation14 Dec 2023 Pakkapon Phongthawee, Worameth Chinchuthakun, Nontaphat Sinsunthithet, Amit Raj, Varun Jampani, Pramook Khungurn, Supasorn Suwajanakorn

To address this problem, we leverage diffusion models trained on billions of standard images to render a chrome ball into the input image.

Lighting Estimation

SwapNet: Garment Transfer in Single View Images

1 code implementation ECCV 2018 Amit Raj, Patsorn Sangkloy, Huiwen Chang, Jingwan Lu, Duygu Ceylan, James Hays

Garment transfer is a challenging task that requires (i) disentangling the features of the clothing from the body pose and shape and (ii) realistic synthesis of the garment texture on the new body.

 Ranked #1 on Virtual Try-on on FashionIQ (using extra training data)

Virtual Try-on

Probing the 3D Awareness of Visual Foundation Models

1 code implementation12 Apr 2024 Mohamed El Banani, Amit Raj, Kevis-Kokitsi Maninis, Abhishek Kar, Yuanzhen Li, Michael Rubinstein, Deqing Sun, Leonidas Guibas, Justin Johnson, Varun Jampani

Given that such models can classify, delineate, and localize objects in 2D, we ask whether they also represent their 3D structure?

Kernel Mean Matching for Content Addressability of GANs

1 code implementation14 May 2019 Wittawat Jitkrittum, Patsorn Sangkloy, Muhammad Waleed Gondal, Amit Raj, James Hays, Bernhard Schölkopf

We propose a novel procedure which adds "content-addressability" to any given unconditional implicit model e. g., a generative adversarial network (GAN).

Generative Adversarial Network Image Generation

Diffusion Sampling with Momentum for Mitigating Divergence Artifacts

1 code implementation20 Jul 2023 Suttisak Wizadwongsa, Worameth Chinchuthakun, Pramook Khungurn, Amit Raj, Supasorn Suwajanakorn

The first technique involves the incorporation of Heavy Ball (HB) momentum, a well-known technique for improving optimization, into existing diffusion numerical methods to expand their stability regions.

Text-to-Image Generation

Deep Forward and Inverse Perceptual Models for Tracking and Prediction

no code implementations31 Oct 2017 Alexander Lambert, Amirreza Shaban, Amit Raj, Zhen Liu, Byron Boots

We consider the problems of learning forward models that map state to high-dimensional images and inverse models that map high-dimensional images to state in robotics.

Image Generation

ANR: Articulated Neural Rendering for Virtual Avatars

no code implementations CVPR 2021 Amit Raj, Julian Tanke, James Hays, Minh Vo, Carsten Stoll, Christoph Lassner

The combination of traditional rendering with neural networks in Deferred Neural Rendering (DNR) provides a compelling balance between computational complexity and realism of the resulting images.

Neural Rendering

PVA: Pixel-aligned Volumetric Avatars

no code implementations7 Jan 2021 Amit Raj, Michael Zollhoefer, Tomas Simon, Jason Saragih, Shunsuke Saito, James Hays, Stephen Lombardi

Volumetric models typically employ a global code to represent facial expressions, such that they can be driven by a small set of animation parameters.

Pixel-Aligned Volumetric Avatars

no code implementations CVPR 2021 Amit Raj, Michael Zollhofer, Tomas Simon, Jason Saragih, Shunsuke Saito, James Hays, Stephen Lombardi

Volumetric models typically employ a global code to represent facial expressions, such that they can be driven by a small set of animation parameters.

Generalizable Novel View Synthesis

DRaCoN -- Differentiable Rasterization Conditioned Neural Radiance Fields for Articulated Avatars

no code implementations29 Mar 2022 Amit Raj, Umar Iqbal, Koki Nagano, Sameh Khamis, Pavlo Molchanov, James Hays, Jan Kautz

In this work, we present, DRaCoN, a framework for learning full-body volumetric avatars which exploits the advantages of both the 2D and 3D neural rendering techniques.

Neural Rendering

LANe: Lighting-Aware Neural Fields for Compositional Scene Synthesis

no code implementations6 Apr 2023 Akshay Krishnan, Amit Raj, Xianling Zhang, Alexandra Carlson, Nathan Tseng, Sandhya Sridhar, Nikita Jaipuria, James Hays

Specifically, we learn a scene representation that disentangles the static background and transient elements into a world-NeRF and class-specific object-NeRFs to allow compositional synthesis of multiple objects in the scene.

Object

MAGMA: Music Aligned Generative Motion Autodecoder

no code implementations3 Sep 2023 Sohan Anisetty, Amit Raj, James Hays

Mapping music to dance is a challenging problem that requires spatial and temporal coherence along with a continual synchronization with the music's progression.

Audio Compression

Which way is `right'?: Uncovering limitations of Vision-and-Language Navigation model

no code implementations30 Nov 2023 Meera Hahn, Amit Raj, James M. Rehg

The challenging task of Vision-and-Language Navigation (VLN) requires embodied agents to follow natural language instructions to reach a goal location or object (e. g. `walk down the hallway and turn left at the piano').

Vision and Language Navigation

Dress-Me-Up: A Dataset & Method for Self-Supervised 3D Garment Retargeting

no code implementations6 Jan 2024 Shanthika Naik, Kunwar Singh, Astitva Srivastava, Dhawal Sirikonda, Amit Raj, Varun Jampani, Avinash Sharma

We propose a novel self-supervised framework for retargeting non-parameterized 3D garments onto 3D human avatars of arbitrary shapes and poses, enabling 3D virtual try-on (VTON).

Virtual Try-on

SHINOBI: Shape and Illumination using Neural Object Decomposition via BRDF Optimization In-the-wild

no code implementations18 Jan 2024 Andreas Engelhardt, Amit Raj, Mark Boss, Yunzhi Zhang, Abhishek Kar, Yuanzhen Li, Deqing Sun, Ricardo Martin Brualla, Jonathan T. Barron, Hendrik P. A. Lensch, Varun Jampani

We present SHINOBI, an end-to-end framework for the reconstruction of shape, material, and illumination from object images captured with varying lighting, pose, and background.

Inverse Rendering Object

WordRobe: Text-Guided Generation of Textured 3D Garments

no code implementations26 Mar 2024 Astitva Srivastava, Pranav Manu, Amit Raj, Varun Jampani, Avinash Sharma

We achieve this by first learning a latent representation of 3D garments using a novel coarse-to-fine training strategy and a loss for latent disentanglement, promoting better latent interpolation.

Disentanglement text-guided-generation +1

3D Congealing: 3D-Aware Image Alignment in the Wild

no code implementations2 Apr 2024 Yunzhi Zhang, Zizhang Li, Amit Raj, Andreas Engelhardt, Yuanzhen Li, Tingbo Hou, Jiajun Wu, Varun Jampani

The framework optimizes for the canonical representation together with the pose for each input image, and a per-image coordinate map that warps 2D pixel coordinates to the 3D canonical frame to account for the shape matching.

Pose Estimation

MagicMirror: Fast and High-Quality Avatar Generation with a Constrained Search Space

no code implementations1 Apr 2024 Armand Comas-Massagué, Di Qiu, Menglei Chai, Marcel Bühler, Amit Raj, Ruiqi Gao, Qiangeng Xu, Mark Matthews, Paulo Gotardo, Octavia Camps, Sergio Orts-Escolano, Thabo Beeler

We introduce a novel framework for 3D human avatar generation and personalization, leveraging text prompts to enhance user engagement and customization.

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