更新红外算法，增加阈值调整

Assets/WebCamera/Script/ZIM/ScreenLocate.cs

@@ -308,10 +308,14 @@ public class ScreenLocate : MonoBehaviour
         if (mUVCCameraInfo == null) return;
 
         if (screenIdentification == null)
+        {
             screenIdentification = new o0.Project.ScreenIdentification(mUVCTexture);
-
+        }
         if (infraredLocate == null)
+        {
             infraredLocate = new InfraredLocate(mUVCCameraInfo, screenIdentification, InfraredSpotSettings);
+            infraredLocate.SetBrightnessThreshold(0.8f);     // 参数是 红外灯的亮度阈值，阈值越小能够检测到的亮度就越低，默认值是0.93
+        }
 
         if (mode == Mode.ScreenLocateManual)
         {