fixed several test failures; currently 9 out of 73 tests fail

modules/features2d/src/akaze.cpp

@@ -187,6 +187,28 @@ namespace cv
             }
         }
 
+        void write(FileStorage& fs) const
+        {
+            fs << "descriptor" << descriptor;
+            fs << "descriptor_channels" << descriptor_channels;
+            fs << "descriptor_size" << descriptor_size;
+            fs << "threshold" << threshold;
+            fs << "octaves" << octaves;
+            fs << "sublevels" << sublevels;
+            fs << "diffusivity" << diffusivity;
+        }
+
+        void read(const FileNode& fn)
+        {
+            descriptor = (int)fn["descriptor"];
+            descriptor_channels = (int)fn["descriptor_channels"];
+            descriptor_size = (int)fn["descriptor_size"];
+            threshold = (float)fn["threshold"];
+            octaves = (int)fn["octaves"];
+            sublevels = (int)fn["sublevels"];
+            diffusivity = (int)fn["diffusivity"];
+        }
+
         int descriptor;
         int descriptor_channels;
         int descriptor_size;

modules/features2d/src/brisk.cpp

@@ -2099,7 +2099,7 @@ BriskLayer::BriskLayer(const BriskLayer& layer, int mode)
 void
 BriskLayer::getAgastPoints(int threshold, std::vector<KeyPoint>& keypoints)
 {
-  fast_9_16_->set("threshold", threshold);
+  fast_9_16_ = FastFeatureDetector::create(threshold);
   fast_9_16_->detect(img_, keypoints);
 
   // also write scores

modules/features2d/src/feature2d.cpp

@@ -60,6 +60,11 @@ void Feature2D::detect( InputArray image,
                         std::vector<KeyPoint>& keypoints,
                         InputArray mask )
 {
+    if( image.empty() )
+    {
+        keypoints.clear();
+        return;
+    }
     detectAndCompute(image, mask, keypoints, noArray(), false);
 }
 
@@ -97,6 +102,11 @@ void Feature2D::compute( InputArray image,
                          std::vector<KeyPoint>& keypoints,
                          OutputArray descriptors )
 {
+    if( image.empty() )
+    {
+        descriptors.release();
+        return;
+    }
     detectAndCompute(image, noArray(), keypoints, descriptors, true);
 }
 

modules/features2d/src/kaze.cpp

@@ -132,6 +132,26 @@ namespace cv
             }
         }
 
+        void write(FileStorage& fs) const
+        {
+            fs << "extended" << (int)extended;
+            fs << "upright" << (int)upright;
+            fs << "threshold" << threshold;
+            fs << "octaves" << octaves;
+            fs << "sublevels" << sublevels;
+            fs << "diffusivity" << diffusivity;
+        }
+
+        void read(const FileNode& fn)
+        {
+            extended = (int)fn["extended"] != 0;
+            upright = (int)fn["upright"] != 0;
+            threshold = (float)fn["threshold"];
+            octaves = (int)fn["octaves"];
+            sublevels = (int)fn["sublevels"];
+            diffusivity = (int)fn["diffusivity"];
+        }
+
         bool extended;
         bool upright;
         float threshold;

modules/features2d/src/kaze/KAZEFeatures.cpp

@@ -145,7 +145,7 @@ int KAZEFeatures::Create_Nonlinear_Scale_Space(const Mat &img)
  */
 void KAZEFeatures::Compute_KContrast(const Mat &img, const float &kpercentile)
 {
-        options_.kcontrast = compute_k_percentile(img, kpercentile, options_.sderivatives, options_.kcontrast_bins, 0, 0);
+    options_.kcontrast = compute_k_percentile(img, kpercentile, options_.sderivatives, options_.kcontrast_bins, 0, 0);
 }
 
 /* ************************************************************************* */

modules/features2d/test/test_brisk.cpp

@@ -72,7 +72,7 @@ void CV_BRISKTest::run( int )
   cvtColor(image1, gray1, COLOR_BGR2GRAY);
   cvtColor(image2, gray2, COLOR_BGR2GRAY);
 
-  Ptr<FeatureDetector> detector = Algorithm::create<FeatureDetector>("Feature2D.BRISK");
+  Ptr<FeatureDetector> detector = BRISK::create();
 
   vector<KeyPoint> keypoints1;
   vector<KeyPoint> keypoints2;

modules/features2d/test/test_matchers_algorithmic.cpp

@@ -532,12 +532,14 @@ void CV_DescriptorMatcherTest::run( int )
 
 TEST( Features2d_DescriptorMatcher_BruteForce, regression )
 {
-    CV_DescriptorMatcherTest test( "descriptor-matcher-brute-force", Algorithm::create<DescriptorMatcher>("DescriptorMatcher.BFMatcher"), 0.01f );
+    CV_DescriptorMatcherTest test( "descriptor-matcher-brute-force",
+                                  DescriptorMatcher::create("BFMatcher"), 0.01f );
     test.safe_run();
 }
 
 TEST( Features2d_DescriptorMatcher_FlannBased, regression )
 {
-    CV_DescriptorMatcherTest test( "descriptor-matcher-flann-based", Algorithm::create<DescriptorMatcher>("DescriptorMatcher.FlannBasedMatcher"), 0.04f );
+    CV_DescriptorMatcherTest test( "descriptor-matcher-flann-based",
+                                  DescriptorMatcher::create("FlannBasedMatcher"), 0.04f );
     test.safe_run();
 }

modules/features2d/test/test_orb.cpp

@@ -47,9 +47,7 @@ using namespace cv;
 
 TEST(Features2D_ORB, _1996)
 {
-    Ptr<FeatureDetector> fd = ORB::create();
-    fd->set("nFeatures", 10000);//setting a higher maximum to make effect of threshold visible
-    fd->set("fastThreshold", 20);//more features than the default
+    Ptr<FeatureDetector> fd = ORB::create(10000, 1.2f, 8, 31, 0, 2, ORB::HARRIS_SCORE, 31, 20);
     Ptr<DescriptorExtractor> de = fd;
 
     Mat image = imread(string(cvtest::TS::ptr()->get_data_path()) + "shared/lena.png");

modules/features2d/test/test_rotation_and_scale_invariance.cpp

@@ -615,19 +615,15 @@ TEST(Features2d_RotationInvariance_Detector_ORB, regression)
 
 TEST(Features2d_RotationInvariance_Descriptor_BRISK, regression)
 {
-    DescriptorRotationInvarianceTest test(Algorithm::create<FeatureDetector>("Feature2D.BRISK"),
-                                          Algorithm::create<DescriptorExtractor>("Feature2D.BRISK"),
-                                          Algorithm::create<DescriptorExtractor>("Feature2D.BRISK")->defaultNorm(),
-                                          0.99f);
+    Ptr<Feature2D> f2d = BRISK::create();
+    DescriptorRotationInvarianceTest test(f2d, f2d, f2d->defaultNorm(), 0.99f);
     test.safe_run();
 }
 
 TEST(Features2d_RotationInvariance_Descriptor_ORB, regression)
 {
-    DescriptorRotationInvarianceTest test(Algorithm::create<FeatureDetector>("Feature2D.ORB"),
-                                          Algorithm::create<DescriptorExtractor>("Feature2D.ORB"),
-                                          Algorithm::create<DescriptorExtractor>("Feature2D.ORB")->defaultNorm(),
-                                          0.99f);
+    Ptr<Feature2D> f2d = ORB::create();
+    DescriptorRotationInvarianceTest test(f2d, f2d, f2d->defaultNorm(), 0.99f);
     test.safe_run();
 }
 
@@ -646,25 +642,19 @@ TEST(Features2d_RotationInvariance_Descriptor_ORB, regression)
 
 TEST(Features2d_ScaleInvariance_Detector_BRISK, regression)
 {
-    DetectorScaleInvarianceTest test(Algorithm::create<FeatureDetector>("Feature2D.BRISK"),
-                                     0.08f,
-                                     0.49f);
+    DetectorScaleInvarianceTest test(BRISK::create(), 0.08f, 0.49f);
     test.safe_run();
 }
 
 TEST(Features2d_ScaleInvariance_Detector_KAZE, regression)
 {
-    DetectorScaleInvarianceTest test(Algorithm::create<FeatureDetector>("Feature2D.KAZE"),
-        0.08f,
-        0.49f);
+    DetectorScaleInvarianceTest test(KAZE::create(), 0.08f, 0.49f);
     test.safe_run();
 }
 
 TEST(Features2d_ScaleInvariance_Detector_AKAZE, regression)
 {
-    DetectorScaleInvarianceTest test(Algorithm::create<FeatureDetector>("Feature2D.AKAZE"),
-        0.08f,
-        0.49f);
+    DetectorScaleInvarianceTest test(AKAZE::create(), 0.08f, 0.49f);
     test.safe_run();
 }