diff --git a/src/diffCheck/geometry/DFMesh.cc b/src/diffCheck/geometry/DFMesh.cc
index 0669b56d..875fc254 100644
--- a/src/diffCheck/geometry/DFMesh.cc
+++ b/src/diffCheck/geometry/DFMesh.cc
@@ -129,16 +129,16 @@ namespace diffCheck::geometry
             double dot11 = v0v1.dot(v0v1);
             double dot12 = v0v1.dot(v0p);
 
-            // Compute barycentric coordinates
+            // create u,v isoparametric mapping to the triangle where (u,v) = (1,0) if projectedPoint = v2, (u,v) = (0,1) if projectedPoint = v1 and (u,v) = (0,0) if projectedPoint = v0
             double invDenom = 1.0 / (dot00 * dot11 - dot01 * dot01);
             double u = (dot11 * dot02 - dot01 * dot12) * invDenom;
             double v = (dot00 * dot12 - dot01 * dot02) * invDenom;
 
             // Check if point is in triangle
-            if ((u >= -associationThreshold) && (v >= -associationThreshold) && (u + v <= 1 + associationThreshold))
+            if ((u >= -associationThreshold / 100) && (v >= -associationThreshold / 100) && (u + v <= 1 + associationThreshold / 100))
             {
                 // Check if the point is close enough to the face
-                double maxProjectionDistance = std::min({(v1 - v0).norm(), (v2 - v1).norm(), (v0 - v2).norm()}) ;
+                double maxProjectionDistance = associationThreshold * std::min({(v1 - v0).norm(), (v2 - v1).norm(), (v0 - v2).norm()}) ;
                 if ((projectedPoint - point).norm() < maxProjectionDistance)
                 {
                     return true;
diff --git a/src/diffCheck/segmentation/DFSegmentation.cc b/src/diffCheck/segmentation/DFSegmentation.cc
index 84a71244..4bbec40d 100644
--- a/src/diffCheck/segmentation/DFSegmentation.cc
+++ b/src/diffCheck/segmentation/DFSegmentation.cc
@@ -269,8 +269,9 @@ namespace diffCheck::segmentation
                     for (auto normal : segment->Normals){segmentNormal += normal;}
                     segmentNormal.normalize();
                     double currentDistance = (faceCenter - segmentCenter).norm();
+                    double currentAngle = std::abs(sin(acos(faceNormal.dot(faceCenter - segmentCenter))));
                     // if the distance is smaller than the previous one, update the distance and the corresponding segment
-                    if (std::abs(sin(acos(faceNormal.dot(segmentNormal)))) < angleThreshold  && currentDistance < faceDistance)
+                    if (std::abs(sin(acos(faceNormal.dot(segmentNormal)))) < angleThreshold  && currentDistance < faceDistance && std::abs(1 - currentAngle) < angleThreshold)
                     {
                         correspondingSegment = segment;
                         faceDistance = currentDistance;
@@ -440,7 +441,7 @@ namespace diffCheck::segmentation
                             
                             double currentDistance = (clusterCenter - faceCenter).norm() * std::abs(std::cos(clusterNormalToJunctionLineAngle))
                             / std::min(std::abs(clusterNormal.dot(faceNormal)), 0.05) ;
-                            if (std::abs(sin(acos(faceNormal.dot(clusterNormal)))) < angleThreshold && currentDistance < distance)
+                            if (std::abs(sin(acos(faceNormal.dot(clusterNormal)))) < angleThreshold && currentDistance < distance && std::abs(1 - std::sin(clusterNormalToJunctionLineAngle)) < associationThreshold)
                             {
                                 goodMeshIndex = meshIndex;
                                 goodFaceIndex = faceIndex;