diff --git a/Windows/CS/Framework4.0/Toprie/Toprie/Camera.cs b/Windows/CS/Framework4.0/Toprie/Toprie/Camera.cs
index c008239..651bc52 100644
--- a/Windows/CS/Framework4.0/Toprie/Toprie/Camera.cs
+++ b/Windows/CS/Framework4.0/Toprie/Toprie/Camera.cs
@@ -697,8 +697,8 @@ namespace JoyD.Windows.CS.Toprie
                 {   
                     using (Graphics g = Graphics.FromImage(_imageBuffer))
                     {   
-                        // 清除缓冲区背景为黑色
-                        g.Clear(Color.Black);
+                        // 清除缓冲区背景为透明色，确保热图能够正常显示
+                        g.Clear(Color.Transparent);
                         
                         // 步骤1：先将LastImage绘制到全局缓冲
                         if (lastImage != null)