diff --git a/XP.ImageProcessing.RoiControl/Controls/PolygonRoiCanvas.xaml.cs b/XP.ImageProcessing.RoiControl/Controls/PolygonRoiCanvas.xaml.cs
index 2222c99..917ae39 100644
--- a/XP.ImageProcessing.RoiControl/Controls/PolygonRoiCanvas.xaml.cs
+++ b/XP.ImageProcessing.RoiControl/Controls/PolygonRoiCanvas.xaml.cs
@@ -386,12 +386,14 @@ namespace XP.ImageProcessing.RoiControl.Controls
         private System.Windows.Media.Imaging.WriteableBitmap _bubbleMask;
         private int _bubbleThreshold = 128;
         private int _bubbleBrushSize = 5;
+        private double _bubbleVoidLimit = 25.0;
         private bool _bubbleBrushDragging;
         private readonly System.Collections.Generic.Stack<byte[]> _bubbleUndoStack = new();
 
         public void SetBubbleTool(BubbleSubTool tool) => _bubbleTool = tool;
         public void SetBubbleThreshold(int val) => _bubbleThreshold = val;
         public void SetBubbleBrushSize(int val) => _bubbleBrushSize = val;
+        public void SetBubbleVoidLimit(double val) { _bubbleVoidLimit = val; UpdateBubbleResult(); }
         public Rect? BubbleRoi => _bubbleRoi;
 
         /// <summary>设置 BGA 测量的气泡/焊球绘制模式</summary>
@@ -467,6 +469,14 @@ namespace XP.ImageProcessing.RoiControl.Controls
             _angleTempVDot = _angleTempADot = null; _angleTempLineA = null;
             _angleTempV = _angleTempA = null; _angleClickCount = 0;
             _mDraggingDot = null; _mDraggingOwner = null;
+            // 清理气泡测量状态
+            _bubbleRoiRect = null; _bubbleRoiHandle = null; _bubbleResultLabel = null;
+            _bubbleMaskImage = null; _bubbleMask = null;
+            _bubbleRoi = null; _bubbleRoiStart = null;
+            _bubbleRoiDragging = false; _bubbleRoiMoving = false;
+            _bubbleRoiResizing = false; _bubbleBrushDragging = false;
+            _bubbleTool = BubbleSubTool.Roi;
+            _bubbleUndoStack.Clear();
         }
 
         public void ClearMeasurements() => RemoveMeasureOverlay();
@@ -1287,8 +1297,8 @@ namespace XP.ImageProcessing.RoiControl.Controls
             // 更新 ROI 上方标签
             if (_bubbleResultLabel != null)
             {
-                string cls = voidRate <= 25.0 ? "PASS" : "FAIL";
-                _bubbleResultLabel.Text = $"Void: {voidRate:F1}% | {cls}";
+                string cls = voidRate <= _bubbleVoidLimit ? "PASS" : "FAIL";
+                _bubbleResultLabel.Text = $"Void: {voidRate:F1}% | Limit: {_bubbleVoidLimit:F1}% | {cls}";
                 _bubbleResultLabel.Foreground = cls == "PASS" ? Brushes.Lime : Brushes.Red;
                 Canvas.SetLeft(_bubbleResultLabel, roi.X);
                 Canvas.SetTop(_bubbleResultLabel, roi.Y - 20);