Patrick Liu

Patrick Liu works on AI agents at Hark after AI research at Perplexity. His coauthored DiffusionSat research explores satellite-image generation, super-resolution and temporal reconstruction, building on research and engineering work at Stanford, Hippocratic AI, Meta and Intel.

Career

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Based in: San Francisco

Hark

2026 — Present

Member of Technical Staff

Perplexity

2024 — 2026

AI Research Engineer

Stanford Artificial Intelligence Laboratory

Mar 2021 — Mar 2024

Student Researcher

Hippocratic AI

Jun 2023 — Sep 2023

Software Engineer Intern

Intel

Oct 2020 — May 2021

Software Engineer Intern

Stanford University

Master's studies in software

Mission San Jose High School

Products & media

samarkhanna.com

DiffusionSat: generative models for satellite imagery

A coauthored research project on conditioning diffusion models with geospatial metadata, with examples of super-resolution, temporal generation and disaster-image reconstruction. The project also explains its hallucination and reliability limits.

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Patrick Liu

Hark

Perplexity

Stanford Artificial Intelligence Laboratory

Hippocratic AI

Meta

Intel

Stanford University

Mission San Jose High School

Products & media

DiffusionSat: generative models for satellite imagery

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