We can't put a Quaterniond operator randomly here

src/processor/processor_tracker_landmark_object.cpp

@@ -637,15 +637,6 @@ bool ProcessorTrackerLandmarkObject::matchingRANSAC(const std::vector<Eigen::Iso
     return true;
 }
 
-std::ostream &operator<<(std::ostream &flux, Quaterniond quat)
-{
-    flux << quat.x() << " ";
-    flux << quat.y() << " ";
-    flux << quat.z() << " ";
-    flux << quat.w() << " ";
-
-    return flux;
-}
 
 bool ProcessorTrackerLandmarkObject::isInliers(Eigen::Isometry3d cl_M_ol, Eigen::Isometry3d ci_M_oi, Eigen::Isometry3d cl_M_ci)
 {
@@ -667,7 +658,7 @@ bool ProcessorTrackerLandmarkObject::isInliers(Eigen::Isometry3d cl_M_ol, Eigen:
     quat_feat_identity.coeffs() = R2q(wRf_i).coeffs().transpose();
     Vector3d pos_feat_identity = identity.translation();
 
-    std::cout << "\n\n\n\n\n" << quat_feat << " " << quat_feat_identity << std::endl;
+    std::cout << "\n\n\n\n\n" << quat_feat.coeffs().transpose() << " " << quat_feat_identity.coeffs().transpose() << std::endl;
     std::cout << pos_feat << "\n" << pos_feat_identity << "\n\n\n\n\n" << std::endl;
 
     // Error between identity and ol_M_oi