collaborators

6 papers

cs.CV2026

Dependency-Aware Discrete Diffusion for Scene Graph Generation

Rajalaxmi Rajagopalan, Romit Roy Choudhury

Scene graphs (SGs) represent objects and their relationships as structured graphs, enabling applications in image generation, robotics, and 3D understanding. Recent work suggests t…

cs.CV2026

Personalized Image Generation via Human-in-the-loop Bayesian Optimization

Rajalaxmi Rajagopalan, Debottam Dutta, Yu-Lin Wei +1

Imagine Alice has a specific image in her mind, say, the view of the street in which she grew up during her childhood. To generate that exact image, she guides a generativ…

cs.SD2026

Masked Autoencoders as Universal Speech Enhancer

Rajalaxmi Rajagopalan, Ritwik Giri, Zhiqiang Tang +1

Supervised speech enhancement methods have been very successful. However, in practical scenarios, there is a lack of clean speech, and self-supervised learning-based (SSL) speech e…

cs.CV2025

Steer Away From Mode Collisions: Improving Composition In Diffusion Models

Debottam Dutta, Jianchong Chen, Rajalaxmi Rajagopalan +2

We propose to improve multi-concept prompt fidelity in text-to-image diffusion models. We begin with common failure cases - prompts like "a cat and a dog" that sometimes yields ima…

cs.LG2025

Kernel Learning for Sample Constrained Black-Box Optimization

Rajalaxmi Rajagopalan, Yu-Lin Wei, Romit Roy Choudhury

Black box optimization (BBO) focuses on optimizing unknown functions in high-dimensional spaces. In many applications, sampling the unknown function is expensive, imposing a tight…

cs.SD2025

Sample-Constrained Black Box Optimization for Audio Personalization

Rajalaxmi Rajagopalan, Yu-Lin Wei, Romit Roy Choudhury

We consider the problem of personalizing audio to maximize user experience. Briefly, we aim to find a filter , which applied to any music or speech, will maximize the user's s…