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Importance Sampling

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Architecture Development Notes
Architecture Development Notes
Dec 1, 2024 · Fundamentals

How to Add Importance‑Sampling PDFs to a Rust Ray Tracer

This article walks through implementing probability‑density‑function (PDF) based importance sampling in a Rust ray‑tracing renderer, covering trait definitions, concrete PDF types for spheres, cosine distributions, hittable objects, quad geometry, material adjustments, and integration into the rendering loop to achieve faster convergence and higher image quality.

Importance SamplingPDFRay Tracing
0 likes · 15 min read
How to Add Importance‑Sampling PDFs to a Rust Ray Tracer
Alimama Tech
Alimama Tech
Apr 27, 2022 · Artificial Intelligence

DEFUSE and Bi-DEFUSE: Unbiased Delayed‑Feedback Modeling for CVR Prediction

The paper introduces DEFUSE and its multi‑task extension Bi‑DEFUSE, unbiased delayed‑feedback CVR models that correct label bias via rigorous importance‑sampling and a latent fake‑negative variable, achieving superior offline performance and a 2 % CVR lift in online deployment compared with existing industry baselines.

Bi-DEFUSECVRDEFUSE
0 likes · 25 min read
DEFUSE and Bi-DEFUSE: Unbiased Delayed‑Feedback Modeling for CVR Prediction