Search Results for author: Sreyas Mohan

Found 18 papers, 6 papers with code

Taming Mode Collapse in Score Distillation for Text-to-3D Generation

no code implementations31 Dec 2023 Peihao Wang, Dejia Xu, Zhiwen Fan, Dilin Wang, Sreyas Mohan, Forrest Iandola, Rakesh Ranjan, Yilei Li, Qiang Liu, Zhangyang Wang, Vikas Chandra

In this paper, we reveal that the existing score distillation-based text-to-3D generation frameworks degenerate to maximal likelihood seeking on each view independently and thus suffer from the mode collapse problem, manifesting as the Janus artifact in practice.

3D Generation Prompt Engineering +1

Evaluating Unsupervised Denoising Requires Unsupervised Metrics

1 code implementation11 Oct 2022 Adria Marcos-Morales, Matan Leibovich, Sreyas Mohan, Joshua Lawrence Vincent, Piyush Haluai, Mai Tan, Peter Crozier, Carlos Fernandez-Granda

In this work, we propose two novel metrics: the unsupervised mean squared error (MSE) and the unsupervised peak signal-to-noise ratio (PSNR), which are computed using only noisy data.

Denoising

Deep Probability Estimation

no code implementations21 Nov 2021 Sheng Liu, Aakash Kaku, Weicheng Zhu, Matan Leibovich, Sreyas Mohan, Boyang Yu, Haoxiang Huang, Laure Zanna, Narges Razavian, Jonathan Niles-Weed, Carlos Fernandez-Granda

Reliable probability estimation is of crucial importance in many real-world applications where there is inherent (aleatoric) uncertainty.

Autonomous Vehicles Binary Classification +2

Perturbation CheckLists for Evaluating NLG Evaluation Metrics

1 code implementation EMNLP 2021 Ananya B. Sai, Tanay Dixit, Dev Yashpal Sheth, Sreyas Mohan, Mitesh M. Khapra

Natural Language Generation (NLG) evaluation is a multifaceted task requiring assessment of multiple desirable criteria, e. g., fluency, coherency, coverage, relevance, adequacy, overall quality, etc.

Data-to-Text Generation nlg evaluation

Developing and Evaluating Deep Neural Network-based Denoising for Nanoparticle TEM Images with Ultra-low Signal-to-Noise

no code implementations19 Jan 2021 Joshua L. Vincent, Ramon Manzorro, Sreyas Mohan, Binh Tang, Dev Y. Sheth, Eero P. Simoncelli, David S. Matteson, Carlos Fernandez-Granda, Peter A. Crozier

This shows that the network exploits global and local information in the noisy measurements, for example, by adapting its filtering approach when it encounters atomic-level defects at the nanoparticle surface.

Denoising Materials Science Image and Video Processing

Be Like Water: Robustness to Extraneous Variables Via Adaptive Feature Normalization

no code implementations10 Feb 2020 Aakash Kaku, Sreyas Mohan, Avinash Parnandi, Heidi Schambra, Carlos Fernandez-Granda

Extraneous variables are variables that are irrelevant for a certain task, but heavily affect the distribution of the available data.

Knee Cartilage Segmentation Using Diffusion-Weighted MRI

1 code implementation4 Dec 2019 Alejandra Duarte, Chaitra V. Hegde, Aakash Kaku, Sreyas Mohan, José G. Raya

We benchmark our model against a human expert test-retest segmentation and conclude that our model is superior for Patellar and Tibial cartilage using dice score as the comparison metric.

Segmentation

Interpretable and robust blind image denoising with bias-free convolutional neural networks

no code implementations NeurIPS Workshop Deep_Invers 2019 Zahra Kadkhodaie, Sreyas Mohan, Eero P. Simoncelli, Carlos Fernandez-Granda

Here, however, we show that bias terms used in most CNNs (additive constants, including those used for batch normalization) interfere with the interpretability of these networks, do not help performance, and in fact prevent generalization of performance to noise levels not including in the training data.

Image Denoising

Robust and interpretable blind image denoising via bias-free convolutional neural networks

1 code implementation ICLR 2020 Sreyas Mohan, Zahra Kadkhodaie, Eero P. Simoncelli, Carlos Fernandez-Granda

In contrast, a bias-free architecture -- obtained by removing the constant terms in every layer of the network, including those used for batch normalization-- generalizes robustly across noise levels, while preserving state-of-the-art performance within the training range.

Image Denoising

Data-driven Estimation of Sinusoid Frequencies

2 code implementations NeurIPS 2019 Gautier Izacard, Sreyas Mohan, Carlos Fernandez-Granda

Frequency estimation is a fundamental problem in signal processing, with applications in radar imaging, underwater acoustics, seismic imaging, and spectroscopy.

Position Seismic Imaging

Blind nonnegative source separation using biological neural networks

no code implementations1 Jun 2017 Cengiz Pehlevan, Sreyas Mohan, Dmitri B. Chklovskii

Blind source separation, i. e. extraction of independent sources from a mixture, is an important problem for both artificial and natural signal processing.

blind source separation

Data Driven Coded Aperture Design for Depth Recovery

no code implementations29 May 2017 Prasan A Shedligeri, Sreyas Mohan, Kaushik Mitra

To address this drawback we propose a data driven approach for learning the optimal aperture pattern to recover depth map from a single coded image.

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