diff --git a/src/OpenCvSharp/modules/features2d/AKAZE.cs b/src/OpenCvSharp/modules/features2d/AKAZE.cs
index 5a6bfa3a7..f5e9730d9 100644
--- a/src/OpenCvSharp/modules/features2d/AKAZE.cs
+++ b/src/OpenCvSharp/modules/features2d/AKAZE.cs
@@ -26,6 +26,8 @@ public class AKAZE : Feature2D
         private bool disposed;
         private Ptr<AKAZE> ptrObj;
 
+        internal override IntPtr PtrObj => ptrObj.CvPtr;
+
         #region Init & Disposal
 
         /// <summary>
diff --git a/src/OpenCvSharp/modules/features2d/AgastFeatureDetector.cs b/src/OpenCvSharp/modules/features2d/AgastFeatureDetector.cs
index 483e6e812..4970ba20c 100644
--- a/src/OpenCvSharp/modules/features2d/AgastFeatureDetector.cs
+++ b/src/OpenCvSharp/modules/features2d/AgastFeatureDetector.cs
@@ -16,7 +16,9 @@ namespace OpenCvSharp
     public class AgastFeatureDetector : Feature2D
     {
         private bool disposed;
-        private Ptr<AgastFeatureDetector> ptrObj;
+        internal Ptr<AgastFeatureDetector> ptrObj;
+
+        internal override IntPtr PtrObj => ptrObj.CvPtr;
 
 #pragma warning disable 1591
         public const int
diff --git a/src/OpenCvSharp/modules/features2d/BFMatcher.cs b/src/OpenCvSharp/modules/features2d/BFMatcher.cs
index 6d8acbedd..4d2ff95f0 100644
--- a/src/OpenCvSharp/modules/features2d/BFMatcher.cs
+++ b/src/OpenCvSharp/modules/features2d/BFMatcher.cs
@@ -13,6 +13,8 @@ public class BFMatcher : DescriptorMatcher
         private bool disposed;
         private Ptr<BFMatcher> detectorPtr;
 
+        internal override IntPtr PtrObj => detectorPtr.CvPtr;
+
         #region Init & Disposal
 
         /// <summary>
diff --git a/src/OpenCvSharp/modules/features2d/BOWImgDescriptorExtractor.cs b/src/OpenCvSharp/modules/features2d/BOWImgDescriptorExtractor.cs
index 5787d6d43..01263cdd8 100644
--- a/src/OpenCvSharp/modules/features2d/BOWImgDescriptorExtractor.cs
+++ b/src/OpenCvSharp/modules/features2d/BOWImgDescriptorExtractor.cs
@@ -21,8 +21,7 @@ public BOWImgDescriptorExtractor(Feature2D dextractor, DescriptorMatcher dmatche
                 throw new ArgumentNullException(nameof(dextractor));
             if (dmatcher == null)
                 throw new ArgumentNullException(nameof(dmatcher));
-            ptr = NativeMethods.features2d_BOWImgDescriptorExtractor_new1(dextractor.ptrObj.CvPtr,
-                dmatcher.detectorPtr.CvPtr);
+            ptr = NativeMethods.features2d_BOWImgDescriptorExtractor_new1(dextractor.PtrObj, dmatcher.PtrObj);
         }
 
         /// <summary>
@@ -33,7 +32,7 @@ public BOWImgDescriptorExtractor(DescriptorMatcher dmatcher)
         {
             if (dmatcher == null)
                 throw new ArgumentNullException(nameof(dmatcher));
-            ptr = NativeMethods.features2d_BOWImgDescriptorExtractor_new2(dmatcher.detectorPtr.CvPtr);
+            ptr = NativeMethods.features2d_BOWImgDescriptorExtractor_new2(dmatcher.PtrObj);
         }
 
 #if LANG_JP
diff --git a/src/OpenCvSharp/modules/features2d/BRISK.cs b/src/OpenCvSharp/modules/features2d/BRISK.cs
index f192ec9e4..2bea93109 100644
--- a/src/OpenCvSharp/modules/features2d/BRISK.cs
+++ b/src/OpenCvSharp/modules/features2d/BRISK.cs
@@ -20,6 +20,8 @@ public class BRISK : Feature2D
         private bool disposed;
         private Ptr<BRISK> ptrObj;
 
+        internal override IntPtr PtrObj => ptrObj.CvPtr;
+
         #region Init & Disposal
 
         /// <summary>
diff --git a/src/OpenCvSharp/modules/features2d/DescriptorMatcher.cs b/src/OpenCvSharp/modules/features2d/DescriptorMatcher.cs
index 489f6637b..757a46d4c 100644
--- a/src/OpenCvSharp/modules/features2d/DescriptorMatcher.cs
+++ b/src/OpenCvSharp/modules/features2d/DescriptorMatcher.cs
@@ -15,7 +15,9 @@ public class DescriptorMatcher : Algorithm
         /// <summary>
         /// 
         /// </summary>
-        internal Ptr<DescriptorMatcher> detectorPtr;
+        private Ptr<DescriptorMatcher> detectorPtr;
+
+        internal virtual IntPtr PtrObj => detectorPtr.CvPtr;
 
         #region Init & Disposal
 
diff --git a/src/OpenCvSharp/modules/features2d/FastFeatureDetector.cs b/src/OpenCvSharp/modules/features2d/FastFeatureDetector.cs
index 35bbc0fc5..c20b54238 100644
--- a/src/OpenCvSharp/modules/features2d/FastFeatureDetector.cs
+++ b/src/OpenCvSharp/modules/features2d/FastFeatureDetector.cs
@@ -17,6 +17,8 @@ public class FastFeatureDetector : Feature2D
         private bool disposed;
         private Ptr<FastFeatureDetector> ptrObj;
 
+        internal override IntPtr PtrObj => ptrObj.CvPtr;
+
         #region Init & Disposal
 
         /// <summary>
diff --git a/src/OpenCvSharp/modules/features2d/Feature2D.cs b/src/OpenCvSharp/modules/features2d/Feature2D.cs
index 24dce1bde..39c9b36c8 100644
--- a/src/OpenCvSharp/modules/features2d/Feature2D.cs
+++ b/src/OpenCvSharp/modules/features2d/Feature2D.cs
@@ -14,7 +14,9 @@ public class Feature2D : Algorithm
         /// <summary>
         /// cv::Ptr&lt;Feature2D&gt;
         /// </summary>
-        internal Ptr<Feature2D> ptrObj;
+        private Ptr<Feature2D> ptrObj;
+
+        internal virtual IntPtr PtrObj => ptrObj.CvPtr;
 
         /// <summary>
         /// 
diff --git a/src/OpenCvSharp/modules/features2d/FlannBasedMatcher.cs b/src/OpenCvSharp/modules/features2d/FlannBasedMatcher.cs
index 97345c0e4..16c680a9a 100644
--- a/src/OpenCvSharp/modules/features2d/FlannBasedMatcher.cs
+++ b/src/OpenCvSharp/modules/features2d/FlannBasedMatcher.cs
@@ -16,6 +16,8 @@ public class FlannBasedMatcher : DescriptorMatcher
         private bool disposed;
         private Ptr<FlannBasedMatcher> detectorPtr;
 
+        internal override IntPtr PtrObj => detectorPtr.CvPtr;
+
         #region Init & Disposal
 
         /// <summary>
diff --git a/src/OpenCvSharp/modules/features2d/GFTTDetector.cs b/src/OpenCvSharp/modules/features2d/GFTTDetector.cs
index 6c167ba5f..b895aadb0 100644
--- a/src/OpenCvSharp/modules/features2d/GFTTDetector.cs
+++ b/src/OpenCvSharp/modules/features2d/GFTTDetector.cs
@@ -14,6 +14,8 @@ public class GFTTDetector : Feature2D
         private bool disposed;
         private Ptr<GFTTDetector> ptrObj;
 
+        internal override IntPtr PtrObj => ptrObj.CvPtr;
+
         #region Init & Disposal
 
         /// <summary>
diff --git a/src/OpenCvSharp/modules/features2d/KAZE.cs b/src/OpenCvSharp/modules/features2d/KAZE.cs
index 4115a17db..2f5a24e77 100644
--- a/src/OpenCvSharp/modules/features2d/KAZE.cs
+++ b/src/OpenCvSharp/modules/features2d/KAZE.cs
@@ -18,6 +18,8 @@ public class KAZE : Feature2D
         private bool disposed;
         private Ptr<KAZE> ptrObj;
 
+        internal override IntPtr PtrObj => ptrObj.CvPtr;
+
         #region Init & Disposal
 
         /// <summary>
diff --git a/src/OpenCvSharp/modules/features2d/MSER.cs b/src/OpenCvSharp/modules/features2d/MSER.cs
index 7bb8dba41..e9dd97e56 100644
--- a/src/OpenCvSharp/modules/features2d/MSER.cs
+++ b/src/OpenCvSharp/modules/features2d/MSER.cs
@@ -21,6 +21,8 @@ public class MSER : Feature2D
         private bool disposed;
         private Ptr<MSER> ptrObj;
 
+        internal override IntPtr PtrObj => ptrObj.CvPtr;
+
         #region Init & Disposal
 
         /// <summary>
diff --git a/src/OpenCvSharp/modules/features2d/ORB.cs b/src/OpenCvSharp/modules/features2d/ORB.cs
index cd7af8696..bc3a66831 100644
--- a/src/OpenCvSharp/modules/features2d/ORB.cs
+++ b/src/OpenCvSharp/modules/features2d/ORB.cs
@@ -24,6 +24,8 @@ public class ORB : Feature2D
         private bool disposed;
         private Ptr<ORB> ptrObj;
 
+        internal override IntPtr PtrObj => ptrObj.CvPtr;
+
         #region Init & Disposal
 
         /// <summary>
diff --git a/src/OpenCvSharp/modules/features2d/SimpleBlobDetector.cs b/src/OpenCvSharp/modules/features2d/SimpleBlobDetector.cs
index 4825ce02e..68a567d9f 100644
--- a/src/OpenCvSharp/modules/features2d/SimpleBlobDetector.cs
+++ b/src/OpenCvSharp/modules/features2d/SimpleBlobDetector.cs
@@ -11,6 +11,8 @@ public class SimpleBlobDetector : Feature2D
         private bool disposed;
         private Ptr<SimpleBlobDetector> ptrObj;
 
+        internal override IntPtr PtrObj => ptrObj.CvPtr;
+
         /// <summary>
         /// SimpleBlobDetector parameters
         /// </summary>
diff --git a/src/OpenCvSharp/modules/xfeatures2d/BriefDescriptorExtractor.cs b/src/OpenCvSharp/modules/xfeatures2d/BriefDescriptorExtractor.cs
index e501c1063..fb198514e 100644
--- a/src/OpenCvSharp/modules/xfeatures2d/BriefDescriptorExtractor.cs
+++ b/src/OpenCvSharp/modules/xfeatures2d/BriefDescriptorExtractor.cs
@@ -23,6 +23,8 @@ public class BriefDescriptorExtractor : DescriptorExtractor
         /// </summary>
         private Ptr<BriefDescriptorExtractor> ptrObj;
 
+        internal override IntPtr PtrObj => ptrObj.CvPtr;
+
         /// <summary>
         /// 
         /// </summary>
diff --git a/src/OpenCvSharp/modules/xfeatures2d/FREAK.cs b/src/OpenCvSharp/modules/xfeatures2d/FREAK.cs
index 9718f4da0..7a7595557 100644
--- a/src/OpenCvSharp/modules/xfeatures2d/FREAK.cs
+++ b/src/OpenCvSharp/modules/xfeatures2d/FREAK.cs
@@ -20,6 +20,8 @@ public class FREAK : Feature2D
         private bool disposed;
         private Ptr<FREAK> ptrObj;
 
+        internal override IntPtr PtrObj => ptrObj.CvPtr;
+
         #region Init & Disposal
 
         /// <summary>
diff --git a/src/OpenCvSharp/modules/xfeatures2d/StarDetector.cs b/src/OpenCvSharp/modules/xfeatures2d/StarDetector.cs
index 68d9350b5..d2ece9cb5 100644
--- a/src/OpenCvSharp/modules/xfeatures2d/StarDetector.cs
+++ b/src/OpenCvSharp/modules/xfeatures2d/StarDetector.cs
@@ -17,6 +17,8 @@ public class StarDetector : Feature2D
         private bool disposed;
         private Ptr<StarDetector> ptrObj;
 
+        internal override IntPtr PtrObj => ptrObj.CvPtr;
+
         #region Init & Disposal
 
         /// <summary>