brisk add detection threshold for custom sampling pattern

modules/features2d/include/opencv2/features2d.hpp

@@ -250,6 +250,23 @@ public:
     @param indexChange index remapping of the bits. */
     CV_WRAP static Ptr<BRISK> create(const std::vector<float> &radiusList, const std::vector<int> &numberList,
         float dMax=5.85f, float dMin=8.2f, const std::vector<int>& indexChange=std::vector<int>());
+
+    /** @brief The BRISK constructor for a custom pattern, detection threshold and octaves
+
+    @param thresh AGAST detection threshold score.
+    @param octaves detection octaves. Use 0 to do single scale.
+    @param radiusList defines the radii (in pixels) where the samples around a keypoint are taken (for
+    keypoint scale 1).
+    @param numberList defines the number of sampling points on the sampling circle. Must be the same
+    size as radiusList..
+    @param dMax threshold for the short pairings used for descriptor formation (in pixels for keypoint
+    scale 1).
+    @param dMin threshold for the long pairings used for orientation determination (in pixels for
+    keypoint scale 1).
+    @param indexChange index remapping of the bits. */
+    CV_WRAP static Ptr<BRISK> create(int thresh, int octaves, const std::vector<float> &radiusList,
+        const std::vector<int> &numberList, float dMax=5.85f, float dMin=8.2f,
+        const std::vector<int>& indexChange=std::vector<int>());
 };
 
 /** @brief Class implementing the ORB (*oriented BRIEF*) keypoint detector and descriptor extractor

modules/features2d/src/brisk.cpp

@@ -59,6 +59,10 @@ public:
     explicit BRISK_Impl(const std::vector<float> &radiusList, const std::vector<int> &numberList,
         float dMax=5.85f, float dMin=8.2f, const std::vector<int> indexChange=std::vector<int>());
 
+    explicit BRISK_Impl(int thresh, int octaves, const std::vector<float> &radiusList,
+        const std::vector<int> &numberList, float dMax=5.85f, float dMin=8.2f,
+        const std::vector<int> indexChange=std::vector<int>());
+
     virtual ~BRISK_Impl();
 
     int descriptorSize() const
@@ -319,6 +323,18 @@ BRISK_Impl::BRISK_Impl(const std::vector<float> &radiusList,
   octaves = 3;
 }
 
+BRISK_Impl::BRISK_Impl(int thresh,
+                       int octaves_in,
+                       const std::vector<float> &radiusList,
+                       const std::vector<int> &numberList,
+                       float dMax, float dMin,
+                       const std::vector<int> indexChange)
+{
+  generateKernel(radiusList, numberList, dMax, dMin, indexChange);
+  threshold = thresh;
+  octaves = octaves_in;
+}
+
 void
 BRISK_Impl::generateKernel(const std::vector<float> &radiusList,
                            const std::vector<int> &numberList,
@@ -2318,4 +2334,11 @@ Ptr<BRISK> BRISK::create(const std::vector<float> &radiusList, const std::vector
     return makePtr<BRISK_Impl>(radiusList, numberList, dMax, dMin, indexChange);
 }
 
+Ptr<BRISK> BRISK::create(int thresh, int octaves, const std::vector<float> &radiusList,
+                         const std::vector<int> &numberList, float dMax, float dMin,
+                         const std::vector<int>& indexChange)
+{
+    return makePtr<BRISK_Impl>(thresh, octaves, radiusList, numberList, dMax, dMin, indexChange);
+}
+
 }