add test for soft cascade detect method

modules/objdetect/include/opencv2/objdetect/objdetect.hpp

@@ -493,12 +493,18 @@ protected:
 class CV_EXPORTS SoftCascade
 {
 public:
+    //! empty cascade will be created.
     SoftCascade();
+
+    //! cascade will be loaded from file "filename"
     SoftCascade( const string& filename, const float minScale = 0.4f, const float maxScale = 5.f);
-    virtual ~SoftCascade();
     bool load( const string& filename, const float minScale = 0.4f, const float maxScale = 5.f);
 
-    virtual void detectMultiScale(const Mat& image, const std::vector<cv::Rect>& rois, std::vector<cv::Rect>& objects, double factor = 1.05, int step = 4, int rejectfactor = 1);
+    virtual ~SoftCascade();
+
+    //! return vector of bounding boxes. Each box contains detected object
+    virtual void detectMultiScale(const Mat& image, const std::vector<cv::Rect>& rois, std::vector<cv::Rect>& objects,
+    int step = 4, int rejectfactor = 1);
 
 protected:
     virtual void detectForOctave(int octave);

modules/objdetect/src/softcascade.cpp

@@ -319,14 +319,20 @@ bool cv::SoftCascade::load( const string& filename, const float minScale, const
     filds = new Filds;
     Filds& flds = *filds;
     if (!flds.fill(fs.getFirstTopLevelNode(), minScale, maxScale)) return false;
-    // flds.calcLevels(FRAME_WIDTH, FRAME_HEIGHT, TOTAL_SCALES);
+    flds.calcLevels(FRAME_WIDTH, FRAME_HEIGHT, TOTAL_SCALES);
 
     return true;
 }
 
 void cv::SoftCascade::detectMultiScale(const Mat& image, const std::vector<cv::Rect>& rois, std::vector<cv::Rect>& objects,
-                                           const double factor, const int step, const int rejectfactor)
-{}
+                                       const int step, const int rejectfactor)
+{
+    // only color images are supperted
+    CV_Assert(image.type() == CV_8UC3);
+
+    // only this window size allowed
+    CV_Assert(image.cols == 640 && image.rows == 480);
+}
 
 void cv::SoftCascade::detectForOctave(const int octave)
 {}

modules/objdetect/test/test_softcascade.cpp

@@ -47,4 +47,23 @@ TEST(SoftCascade, readCascade)
     cv::SoftCascade cascade;
     ASSERT_TRUE(cascade.load(xml));
 
+}
+
+TEST(SoftCascade, Detect)
+{
+    std::string xml =  cvtest::TS::ptr()->get_data_path() + "cascadeandhog/softcascade.xml";
+    std::cout << "PATH: "<< xml << std::endl;
+    cv::SoftCascade cascade;
+    ASSERT_TRUE(cascade.load(xml));
+
+    cv::Mat colored = cv::imread(cvtest::TS::ptr()->get_data_path() + "cascadeandhog/bahnhof/image_00000006_0.png");
+    ASSERT_FALSE(colored.empty());
+
+    std::vector<cv::Rect> objectBoxes;
+    std::vector<cv::Rect> rois;
+    rois.push_back(cv::Rect(0, 0, 640, 480));
+    ASSERT_NO_THROW(
+    {
+        cascade.detectMultiScale(colored, rois, objectBoxes);
+    });
 }