技术咨询：能否使用Affdex SDK实现眼球追踪及每帧眼球位置追踪？

Hey there! Let's break down your questions about Affdex SDK's eye tracking features clearly:

• Does Affdex SDK support eye tracking?
  Yes, it does—but with a few important caveats. Affdex's core focus is facial expression analysis, so eye tracking is a secondary feature built into its facial landmark detection system. It can detect basic eye-related metrics like eye openness (open/closed states), general gaze direction (left/right/up/down), and track key eye landmarks. That said, it's not a dedicated high-precision eye tracking tool (unlike specialized SDKs designed for deep eye movement research), so it's best suited for use cases where you need eye tracking alongside facial expression analysis, rather than standalone high-fidelity eye tracking.

• Can I track eye position in every frame?
  Absolutely. When processing video streams or real-time camera feed, the Affdex SDK returns frame-by-frame facial analysis results. Within these results, you'll find coordinates for key eye landmarks (like pupil centers, inner/outer corners of the eyes). You just need to hook into the SDK's frame callback method to extract this data for each successfully analyzed frame. Keep in mind that this relies on the SDK being able to detect a clear, unobstructed face in the frame—if the face is partially hidden, turned at an extreme angle, or out of frame, the eye tracking data might not be available for that particular frame.

内容的提问来源于stack exchange，提问作者Halaby