Field notes — essays & research notes

Things I've written down.

Ruby, Rails, performance, security and applied machine learning. Updated when something feels finished.

All Ruby & Rails Security LLM & Agents MLOps Computer Vision Big Data Research
1 post in Computer Vision
COMPUTER VISION 03 / 14 / 26

Blocking 99.3% of spoofing attacks with nothing but a webcam

No infrared, no depth sensor, no GPU. What a multi-signal liveness pipeline actually catches, what it misses, and the cheapest check that beat all the expensive ones.

5 min