Publications (15)
Malliavin Calculus for Score-based Diffusion Models
Ehsan Mirafzali, Utkarsh Gupta, Patrick Wyrod +3
We introduce a new framework based on Malliavin calculus to derive exact analytical expressions for the score function , i.e., the gradient of the log-density a…
BMapEst: Estimation of Brain Tissue Probability Maps using a Differentiable MRI Simulator
Utkarsh Gupta, Emmanouil Nikolakakis, Moritz Zaiss +1
Reconstructing digital brain phantoms in the form of voxel-based, multi-channeled tissue probability maps for individual subjects is essential for capturing brain anatomical variab…
GaSpCT: Gaussian Splatting for Novel CT Projection View Synthesis
Emmanouil Nikolakakis, Utkarsh Gupta, Jonathan Vengosh +2
We present GaSpCT, a novel view synthesis and 3D scene representation method used to generate novel projection views for Computer Tomography (CT) scans. We adapt the Gaussian Splat…
Modified LAB Algorithm with Clustering-based Search Space Reduction Method for solving Engineering Design Problems
Ruturaj Reddy, Utkarsh Gupta, Ishaan Kale +2
A modified LAB algorithm is introduced in this paper. It builds upon the original LAB algorithm (Reddy et al. 2023), which is a socio-inspired algorithm that models competitive and…
Spinverse: Differentiable Physics for Permeability-Aware Microstructure Reconstruction from Diffusion MRI
Prathamesh Pradeep Khole, Mario M. Brenes, Zahra Kais Petiwala +5
Diffusion MRI (dMRI) is sensitive to microstructural barriers, yet most existing methods either assume impermeable boundaries or estimate voxel-level parameters without recovering…
A Malliavin calculus approach to score functions in diffusion generative models
Ehsan Mirafzali, Frank Proske, Utkarsh Gupta +2
Score-based diffusion generative models have recently emerged as a powerful tool for modelling complex data distributions. These models aim at learning the score function, which de…
Continuous Reachability for Unordered Data Petri nets is in PTime
Utkarsh Gupta, Preey Shah, S. Akshay +1
Unordered data Petri nets (UDPN) are an extension of classical Petri nets with tokens that carry data from an infinite domain and where transitions may check equality and disequali…
ScripTONES: Sentiment-Conditioned Music Generation for Movie Scripts
Vishruth Veerendranath, Vibha Masti, Utkarsh Gupta +2
Film scores are considered an essential part of the film cinematic experience, but the process of film score generation is often expensive and infeasible for small-scale creators.…
A New Algebraic Approach for String Reconstruction from Substring Compositions
Utkarsh Gupta, Hessam Mahdavifar
We consider the problem of binary string reconstruction from the multiset of its substring compositions, i.e., referred to as the substring composition multiset, first introduced a…
Document Chunking and Learning Objective Generation for Instruction Design
Khoi-Nguyen Tran, Jey Han Lau, Danish Contractor +4
Instructional Systems Design is the practice of creating of instructional experiences that make the acquisition of knowledge and skill more efficient, effective, and appealing. Spe…
Improved Bounds on Diffsequences with Gaps in Powers of 2
Kanav Talwar, Utkarsh Gupta
Let be a set of positive integers. A -diffsequence of length is a sequence of positive integers such that for . F…
Worst-Case Optimal Covering of Rectangles by Disks
Sándor P. Fekete, Utkarsh Gupta, Phillip Keldenich +2
We provide the solution for a fundamental problem of geometric optimization by giving a complete characterization of worst-case optimal disk coverings of rectangles: For any $λ\ge…
ReMiDi: Reconstruction of Microstructure Using a Differentiable Diffusion MRI Simulator
Prathamesh Pradeep Khole, Zahra Kais Petiwala, Shri Prathaa Magesh +5
We propose ReMiDi, a novel method for inferring neuronal microstructure as arbitrary 3D meshes using a differentiable diffusion Magnetic Resonance Imaging (dMRI) simulator. We firs…
LEAF-QA: Locate, Encode & Attend for Figure Question Answering
Ritwick Chaudhry, Sumit Shekhar, Utkarsh Gupta +3
We introduce LEAF-QA, a comprehensive dataset of densely annotated figures/charts, constructed from real-world open data sources, along with ~2 million question-answer (Q…
Bounds on the Statistical Leakage-Resilience of Shamir's Secret Sharing
Utkarsh Gupta, Hessam Mahdavifar
Secret sharing is an instrumental tool for sharing secret keys in distributed systems. In a classical threshold setting, this involves a dealer who has a secret/key, a set of parti…