Merge pull request #2152 from saskatchewancatch:issue-2060

* issue-2060: implement ability to return scores for edgeboxes implementation

* issue-2060: address feedback to add some foolproofing

Author: saskatchewancatch

modules/ximgproc/include/opencv2/ximgproc/edgeboxes.hpp

@@ -74,8 +74,9 @@ class CV_EXPORTS_W EdgeBoxes : public Algorithm
     @param edge_map edge image.
     @param orientation_map orientation map.
     @param boxes proposal boxes.
+    @param scores of the proposal boxes, provided a vector of float types.
     */
-    CV_WRAP virtual void getBoundingBoxes(InputArray edge_map, InputArray orientation_map, CV_OUT std::vector<Rect> &boxes) = 0;
+    CV_WRAP virtual void getBoundingBoxes(InputArray edge_map, InputArray orientation_map, CV_OUT std::vector<Rect> &boxes, OutputArray scores = noArray()) = 0;
 
     /** @brief Returns the step size of sliding window search.
     */

modules/ximgproc/src/edgeboxes.cpp

@@ -48,7 +48,6 @@ OpenCV port by: Leonardo Lontra <lhe dot lontra at gmail dot com>
 */
 
 #include "precomp.hpp"
-
 using namespace cv;
 using namespace std;
 
@@ -79,7 +78,7 @@ class EdgeBoxesImpl : public EdgeBoxes
                   float gamma,
                   float kappa);
 
-    virtual void getBoundingBoxes(InputArray edge_map, InputArray orientation_map, std::vector<Rect> &boxes) CV_OVERRIDE;
+    virtual void getBoundingBoxes(InputArray edge_map, InputArray orientation_map, std::vector<Rect> &boxes, OutputArray scores = noArray()) CV_OVERRIDE;
 
     float getAlpha() const CV_OVERRIDE { return _alpha; }
     void setAlpha(float value) CV_OVERRIDE
@@ -910,13 +909,14 @@ void EdgeBoxesImpl::boxesNms(Boxes &boxes, float thr, float eta, int maxBoxes)
 }
 
 
-void EdgeBoxesImpl::getBoundingBoxes(InputArray edge_map, InputArray orientation_map, std::vector<Rect> &boxes)
+void EdgeBoxesImpl::getBoundingBoxes(InputArray edge_map, InputArray orientation_map, std::vector<Rect> &boxes, OutputArray scores)
 {
     CV_Assert(edge_map.depth() == CV_32F);
     CV_Assert(orientation_map.depth() == CV_32F);
 
     Mat E = edge_map.getMat().t();
     Mat O = orientation_map.getMat().t();
+    std::vector<float> _scores;
 
     h = E.cols;
     w = E.rows;
@@ -931,9 +931,25 @@ void EdgeBoxesImpl::getBoundingBoxes(InputArray edge_map, InputArray orientation
     // create output boxes
     int n = (int) b.size();
     boxes.resize(n);
+
+    if (scores.needed())
+    {
+        _scores.resize(n);
+    }
+
     for(int i=0; i < n; i++)
     {
         boxes[i] = Rect((int)b[i].x + 1, (int)b[i].y + 1, (int)b[i].w, (int)b[i].h);
+        if (scores.needed())
+        {
+            _scores[i] = b[i].score;
+        }
+    }
+
+    // return scores if asked for
+    if (scores.needed())
+    {
+        Mat(_scores).copyTo(scores);
     }
 }