Fix binary compatibility of opencv_features2d

modules/features2d/include/opencv2/features2d/features2d.hpp

@@ -566,19 +566,19 @@ protected:
 CV_EXPORTS void FAST( InputArray image, CV_OUT vector<KeyPoint>& keypoints,
                       int threshold, bool nonmaxSupression=true );
 
-CV_EXPORTS void FAST( InputArray image, CV_OUT vector<KeyPoint>& keypoints,
+CV_EXPORTS void FASTX( InputArray image, CV_OUT vector<KeyPoint>& keypoints,
                       int threshold, bool nonmaxSupression, int type );
 
 class CV_EXPORTS_W FastFeatureDetector : public FeatureDetector
 {
 public:
+
     enum
-    {
+    { // Define it in old class to simplify migration to 2.5
       TYPE_5_8 = 0, TYPE_7_12 = 1, TYPE_9_16 = 2
     };
 
     CV_WRAP FastFeatureDetector( int threshold=10, bool nonmaxSuppression=true );
-    CV_WRAP FastFeatureDetector( int threshold, bool nonmaxSuppression, int type);
     AlgorithmInfo* info() const;
 
 protected:
@@ -586,7 +586,6 @@ protected:
 
     int threshold;
     bool nonmaxSuppression;
-    short type;
 };
 
 

modules/features2d/perf/perf_fast.cpp

@@ -30,10 +30,13 @@ PERF_TEST_P(fast, detect, testing::Combine(
 
     declare.in(frame);
 
-    FastFeatureDetector fd(20, true, type);
+    Ptr<FeatureDetector> fd = Algorithm::create<FeatureDetector>("Feature2D.FASTX");
+    fd->set("threshold", 20);
+    fd->set("nonmaxSuppression", true);
+    fd->set("type", type);
     vector<KeyPoint> points;
 
-    TEST_CYCLE() fd.detect(frame, points);
+    TEST_CYCLE() fd->detect(frame, points);
 
     SANITY_CHECK_KEYPOINTS(points);
 }

modules/features2d/src/brisk.cpp

@@ -121,7 +121,7 @@ private:
   float scale_;
   float offset_;
   // agast
-  cv::Ptr<cv::FastFeatureDetector> fast_9_16_;
+  cv::Ptr<cv::FastFeatureDetector2> fast_9_16_;
   int pixel_5_8_[25];
   int pixel_9_16_[25];
 };
@@ -2000,7 +2000,7 @@ BriskLayer::BriskLayer(const cv::Mat& img_in, float scale_in, float offset_in)
   scale_ = scale_in;
   offset_ = offset_in;
   // create an agast detector
-  fast_9_16_ = new FastFeatureDetector(1, true, FastFeatureDetector::TYPE_9_16);
+  fast_9_16_ = new FastFeatureDetector2(1, true, FastFeatureDetector::TYPE_9_16);
   makeOffsets(pixel_5_8_, (int)img_.step, 8);
   makeOffsets(pixel_9_16_, (int)img_.step, 16);
 }
@@ -2022,7 +2022,7 @@ BriskLayer::BriskLayer(const BriskLayer& layer, int mode)
     offset_ = 0.5f * scale_ - 0.5f;
   }
   scores_ = cv::Mat::zeros(img_.rows, img_.cols, CV_8U);
-  fast_9_16_ = new FastFeatureDetector(1, false, FastFeatureDetector::TYPE_9_16);
+  fast_9_16_ = new FastFeatureDetector2(1, false, FastFeatureDetector::TYPE_9_16);
   makeOffsets(pixel_5_8_, (int)img_.step, 8);
   makeOffsets(pixel_9_16_, (int)img_.step, 16);
 }

modules/features2d/src/fast.cpp

@@ -245,7 +245,7 @@ void FAST_t(InputArray _img, std::vector<KeyPoint>& keypoints, int threshold, bo
     }
 }
 
-void FAST(InputArray _img, std::vector<KeyPoint>& keypoints, int threshold, bool nonmax_suppression, int type)
+void FASTX(InputArray _img, std::vector<KeyPoint>& keypoints, int threshold, bool nonmax_suppression, int type)
 {
   switch(type) {
     case FastFeatureDetector::TYPE_5_8:
@@ -262,24 +262,37 @@ void FAST(InputArray _img, std::vector<KeyPoint>& keypoints, int threshold, bool
 
 void FAST(InputArray _img, std::vector<KeyPoint>& keypoints, int threshold, bool nonmax_suppression)
 {
-    FAST(_img, keypoints, threshold, nonmax_suppression, FastFeatureDetector::TYPE_9_16);
+    FASTX(_img, keypoints, threshold, nonmax_suppression, FastFeatureDetector::TYPE_9_16);
 }
+
 /*
  *   FastFeatureDetector
  */
 FastFeatureDetector::FastFeatureDetector( int _threshold, bool _nonmaxSuppression )
-    : threshold(_threshold), nonmaxSuppression(_nonmaxSuppression), type(FastFeatureDetector::TYPE_9_16)
+    : threshold(_threshold), nonmaxSuppression(_nonmaxSuppression)
 {}
 
-FastFeatureDetector::FastFeatureDetector( int _threshold, bool _nonmaxSuppression, int _type )
+FastFeatureDetector2::FastFeatureDetector2( int _threshold, bool _nonmaxSuppression )
-: threshold(_threshold), nonmaxSuppression(_nonmaxSuppression), type((short)_type)
+    : FastFeatureDetector(_threshold, _nonmaxSuppression), type(FastFeatureDetector::TYPE_9_16)
+{}
+
+FastFeatureDetector2::FastFeatureDetector2( int _threshold, bool _nonmaxSuppression, int _type )
+    : FastFeatureDetector(_threshold, _nonmaxSuppression), type((short)_type)
 {}
 
 void FastFeatureDetector::detectImpl( const Mat& image, vector<KeyPoint>& keypoints, const Mat& mask ) const
 {
     Mat grayImage = image;
     if( image.type() != CV_8U ) cvtColor( image, grayImage, CV_BGR2GRAY );
-    FAST( grayImage, keypoints, threshold, nonmaxSuppression, type );
+    FAST( grayImage, keypoints, threshold, nonmaxSuppression );
+    KeyPointsFilter::runByPixelsMask( keypoints, mask );
+}
+
+void FastFeatureDetector2::detectImpl( const Mat& image, vector<KeyPoint>& keypoints, const Mat& mask ) const
+{
+    Mat grayImage = image;
+    if( image.type() != CV_8U ) cvtColor( image, grayImage, CV_BGR2GRAY );
+    FASTX( grayImage, keypoints, threshold, nonmaxSuppression, type );
     KeyPointsFilter::runByPixelsMask( keypoints, mask );
 }
 

modules/features2d/src/fast_score.hpp

@@ -56,6 +56,19 @@ void makeOffsets(int pixel[25], int row_stride, int patternSize);
 template<int patternSize>
 int cornerScore(const uchar* ptr, const int pixel[], int threshold);
 
+class FastFeatureDetector2 : public FastFeatureDetector
+{
+public:
+    CV_WRAP FastFeatureDetector2( int threshold=10, bool nonmaxSuppression=true);
+    CV_WRAP FastFeatureDetector2( int threshold, bool nonmaxSuppression, int type);
+    AlgorithmInfo* info() const;
+
+protected:
+    virtual void detectImpl( const Mat& image, vector<KeyPoint>& keypoints, const Mat& mask=Mat() ) const;
+
+    short type;
+};
+
 }
 
 #endif

modules/features2d/src/features2d_init.cpp

@@ -41,6 +41,7 @@
 //M*/
 
 #include "precomp.hpp"
+#include "fast_score.hpp"
 
 using namespace cv;
 
@@ -68,6 +69,10 @@ CV_INIT_ALGORITHM(BriefDescriptorExtractor, "Feature2D.BRIEF",
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////
 
 CV_INIT_ALGORITHM(FastFeatureDetector, "Feature2D.FAST",
+                  obj.info()->addParam(obj, "threshold", obj.threshold);
+                  obj.info()->addParam(obj, "nonmaxSuppression", obj.nonmaxSuppression));
+
+CV_INIT_ALGORITHM(FastFeatureDetector2, "Feature2D.FASTX",
                   obj.info()->addParam(obj, "threshold", obj.threshold);
                   obj.info()->addParam(obj, "nonmaxSuppression", obj.nonmaxSuppression);
                   obj.info()->addParam(obj, "type", obj.type));
@@ -167,6 +172,7 @@ bool cv::initModule_features2d(void)
     all &= !BriefDescriptorExtractor_info_auto.name().empty();
     all &= !BRISK_info_auto.name().empty();
     all &= !FastFeatureDetector_info_auto.name().empty();
+    all &= !FastFeatureDetector2_info_auto.name().empty();
     all &= !StarDetector_info_auto.name().empty();
     all &= !MSER_info_auto.name().empty();
     all &= !FREAK_info_auto.name().empty();

modules/features2d/test/test_fast.cpp

@@ -75,8 +75,8 @@ void CV_FastTest::run( int )
 
     vector<KeyPoint> keypoints1;
     vector<KeyPoint> keypoints2;
-    FAST(gray1, keypoints1, 30, true, type);
+    FASTX(gray1, keypoints1, 30, true, type);
-    FAST(gray2, keypoints2, (type > 0 ? 30 : 20), true, type);
+    FASTX(gray2, keypoints2, (type > 0 ? 30 : 20), true, type);
 
     for(size_t i = 0; i < keypoints1.size(); ++i)
     {