brownhci/WebGazer

Webgazer Prediction reverts back to center on extremes.

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#263 建立於 2022年6月28日

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help wanted

描述

The issue is when I move my eyes to the extremes of my vision after a certain point the webgazer prediction reverts back to center. I have depicted the problem via this graph as well.

  • In this graph I start looking from the center and gradually move my eyes to the left and as you can see after a certain point the predictions starts to center again.
  • I checked this is not only the problem in my build but same can be observed in the official demo on the webgazer website.
  • I also checked that it is not a problem with mediapipe facemesh since it is successfully able to get the eye crops and also detect the landmarks of correctly.

I am wondering if there is a certain threshold in prediction which leads to this. Anyways Any ideas to why this might be the case ?

貢獻者指南

技術棧
javascripthtml
領域
frontend
議題類型
bug
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
1-2 days
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
mostly clear
前置要求
JavaScriptWebgazer library internals
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
30
研究方向
The issue appears to be related to the prediction function in Webgazer. Investigate the ridge regression implementation in `src/regression.js` or similar. Look for any clamping or normalization that might force predictions back to the center when eye positions are extreme. Compare the prediction logic with the calibration data to identify the threshold causing this behavior.