Merge pull request #3181 from sturkmen72:bug-fix-edge_drawing

Author: alalek

modules/ximgproc/src/edge_drawing.cpp

@@ -1294,6 +1294,7 @@ void EdgeDrawingImpl::detectLines(OutputArray _lines)
     double* x = new double[(width + height) * 8];
     double* y = new double[(width + height) * 8];
 
+    lines.clear();
     linesNo = 0;
 
     // Use the whole segment
@@ -2427,6 +2428,7 @@ void EdgeDrawingImpl::detectEllipses(OutputArray ellipses)
     }
 
     min_line_len = 6;
+    line_error = params.LineFitErrorThreshold;
     Circles.clear();
     Ellipses.clear();
     lines.clear();

modules/ximgproc/test/test_fld.cpp

@@ -285,8 +285,8 @@ TEST_F(ximgproc_ED, ManySmallCircles)
 
     vector<Vec6d> ellipses;
     detector->detectEdges(test_image);
-    detector->detectLines(lines);
     detector->detectEllipses(ellipses);
+    detector->detectLines(lines);
 
     size_t segments_size = 6458;
     size_t lines_size = 6264;