diff --git a/Windows/CS/Framework4.0/Toprie/Toprie/Camera.Designer.cs b/Windows/CS/Framework4.0/Toprie/Toprie/Camera.Designer.cs
index d4de63f..69bd657 100644
--- a/Windows/CS/Framework4.0/Toprie/Toprie/Camera.Designer.cs
+++ b/Windows/CS/Framework4.0/Toprie/Toprie/Camera.Designer.cs
@@ -64,6 +64,7 @@ namespace JoyD.Windows.CS.Toprie
             this.maskImageBox.TabIndex = 1;
             this.maskImageBox.TabStop = false;
             this.maskImageBox.BackColor = System.Drawing.Color.Transparent;
+            this.maskImageBox.Visible = true;
             // 
             // contextMenuStrip1
             // 
@@ -187,7 +188,9 @@ namespace JoyD.Windows.CS.Toprie
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(8F, 15F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            // 先添加imageBox基础层
             this.Controls.Add(this.imageBox);
+            // 再添加maskImageBox遮罩层，确保它显示在上面
             this.Controls.Add(this.maskImageBox);
             this.Name = "Camera";
             this.Size = new System.Drawing.Size(512, 384);
diff --git a/Windows/CS/Framework4.0/Toprie/Toprie/Camera.cs b/Windows/CS/Framework4.0/Toprie/Toprie/Camera.cs
index e397d42..c7abc8f 100644
--- a/Windows/CS/Framework4.0/Toprie/Toprie/Camera.cs
+++ b/Windows/CS/Framework4.0/Toprie/Toprie/Camera.cs
@@ -110,106 +110,70 @@ namespace JoyD.Windows.CS.Toprie
             {   
                 Console.WriteLine($"UpdateMaskDisplay called, _isImageUpdatePaused: {_isImageUpdatePaused}");
                 
+                // 在UI线程上操作
+                if (InvokeRequired)
+                {   
+                    Invoke(new Action(UpdateMaskDisplay));
+                    return;
+                }
+                
                 if (_isImageUpdatePaused)
                 {   
                     // 使用固定大小512*384，与图像层的src图像大小一致
                     const int bitmapWidth = 512;
                     const int bitmapHeight = 384;
                     
-                    Console.WriteLine($"Creating bitmap with fixed size: {bitmapWidth}x{bitmapHeight} using double buffering");
+                    Console.WriteLine($"Creating bitmap with fixed size: {bitmapWidth}x{bitmapHeight}");
                     
-                    // 创建一个支持双缓冲的位图
+                    // 创建位图
                     Bitmap bitmap = new Bitmap(bitmapWidth, bitmapHeight);
                     
-                    // 使用双缓冲技术绘制
+                    // 直接在bitmap上绘制
                     using (Graphics g = Graphics.FromImage(bitmap))
                     {   
-                        // 创建缓冲区Graphics对象以实现双缓冲
-                        BufferedGraphicsContext bufferedGraphicsContext = BufferedGraphicsManager.Current;
-                        using (BufferedGraphics bufferedGraphics = bufferedGraphicsContext.Allocate(g, new Rectangle(0, 0, bitmapWidth, bitmapHeight)))
+                        // 设置高质量绘制
+                        g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
+                        g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
+                        
+                        // 设置半透明背景
+                        using (Brush brush = new SolidBrush(Color.FromArgb(150, Color.Black)))
                         {   
-                            Graphics bufferGraphics = bufferedGraphics.Graphics;
-                            
-                            // 设置高质量绘制
-                            bufferGraphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
-                            bufferGraphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.ClearTypeGridFit;
-                            
-                            // 设置半透明背景
-                            using (Brush brush = new SolidBrush(Color.FromArgb(150, Color.Black)))
-                            {   
-                                bufferGraphics.FillRectangle(brush, 0, 0, bitmapWidth, bitmapHeight);
-                            }
-                            
-                            // 设置文本样式
-                            Font font = new Font("微软雅黑", 48, FontStyle.Bold);
-                            Brush textBrush = new SolidBrush(Color.White);
-                            StringFormat format = new StringFormat();
-                            format.Alignment = StringAlignment.Center;
-                            format.LineAlignment = StringAlignment.Center;
-                            
-                            // 绘制"暂停"文字
-                            Console.WriteLine("Drawing '暂停' text");
-                            bufferGraphics.DrawString("暂停", font, textBrush, 
-                                new Rectangle(0, 0, bitmapWidth, bitmapHeight), format);
-                            
-                            // 将缓冲区内容绘制到目标位图
-                            bufferedGraphics.Render(g);
+                            g.FillRectangle(brush, 0, 0, bitmapWidth, bitmapHeight);
                         }
+                        
+                        // 设置文本样式
+                        Font font = new Font("微软雅黑", 48, FontStyle.Bold);
+                        Brush textBrush = new SolidBrush(Color.White);
+                        StringFormat format = new StringFormat();
+                        format.Alignment = StringAlignment.Center;
+                        format.LineAlignment = StringAlignment.Center;
+                        
+                        // 绘制"暂停"文字
+                        Console.WriteLine("Drawing '暂停' text");
+                        g.DrawString("暂停", font, textBrush, 
+                            new Rectangle(0, 0, bitmapWidth, bitmapHeight), format);
                     }
                     
-                    // 在UI线程上更新maskImageBox
-                    Console.WriteLine("Updating maskImageBox image");
-                    if (maskImageBox.InvokeRequired)
+                    // 释放旧资源并设置新图像
+                    if (maskImageBox.Image != null)
                     {   
-                        maskImageBox.Invoke(new Action(() => 
-                        {   
-                            // 先释放之前的图像资源
-                            if (maskImageBox.Image != null)
-                            {   
-                                maskImageBox.Image.Dispose();
-                            }
-                            maskImageBox.Image = bitmap;
-                            maskImageBox.Visible = true;
-                            Console.WriteLine("maskImageBox updated via Invoke");
-                        }));
-                    }
-                    else
-                    {   
-                        // 先释放之前的图像资源
-                        if (maskImageBox.Image != null)
-                        {   
-                            maskImageBox.Image.Dispose();
-                        }
-                        maskImageBox.Image = bitmap;
-                        maskImageBox.Visible = true;
-                        Console.WriteLine("maskImageBox updated directly");
+                        maskImageBox.Image.Dispose();
                     }
+                    maskImageBox.Image = bitmap;
+                    maskImageBox.Visible = true;
+                    Console.WriteLine("maskImageBox updated");
                 }
                 else
                 {   
                     // 清除遮罩
                     Console.WriteLine("Clearing maskImageBox image");
-                    if (maskImageBox.InvokeRequired)
+                    if (maskImageBox.Image != null)
                     {   
-                        maskImageBox.Invoke(new Action(() => 
-                        {   
-                            if (maskImageBox.Image != null)
-                            {   
-                                maskImageBox.Image.Dispose();
-                                maskImageBox.Image = null;
-                            }
-                            Console.WriteLine("maskImageBox cleared via Invoke");
-                        }));
-                    }
-                    else
-                    {   
-                        if (maskImageBox.Image != null)
-                        {   
-                            maskImageBox.Image.Dispose();
-                            maskImageBox.Image = null;
-                        }
-                        Console.WriteLine("maskImageBox cleared directly");
+                        maskImageBox.Image.Dispose();
+                        maskImageBox.Image = null;
                     }
+                    maskImageBox.Visible = false; // 非暂停时隐藏遮罩
+                    Console.WriteLine("maskImageBox cleared");
                 }
             }
             catch (Exception ex)