/usr/include/mia-2.2/mia/3d/ is in libmia-2.2-dev 2.2.2-1+b1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/mia-2.2/mia/3d/2dimagefifofilter.hh
/usr/include/mia-2.2/mia/3d/affine_matrix.hh
/usr/include/mia-2.2/mia/3d/camera.hh
/usr/include/mia-2.2/mia/3d/cost.hh
/usr/include/mia-2.2/mia/3d/creator.hh
/usr/include/mia-2.2/mia/3d/critical_point.hh
/usr/include/mia-2.2/mia/3d/datafield.cxx
/usr/include/mia-2.2/mia/3d/datafield.hh
/usr/include/mia-2.2/mia/3d/defines3d.hh
/usr/include/mia-2.2/mia/3d/deformer.hh
/usr/include/mia-2.2/mia/3d/distance.hh
/usr/include/mia-2.2/mia/3d/fifotestfixture.hh
/usr/include/mia-2.2/mia/3d/filter.hh
/usr/include/mia-2.2/mia/3d/fullcost.hh
/usr/include/mia-2.2/mia/3d/fuzzyclustersolver_cg.hh
/usr/include/mia-2.2/mia/3d/fuzzyseg.hh
/usr/include/mia-2.2/mia/3d/ica.hh
/usr/include/mia-2.2/mia/3d/image.hh
/usr/include/mia-2.2/mia/3d/imagecollect.hh
/usr/include/mia-2.2/mia/3d/imageio.hh
/usr/include/mia-2.2/mia/3d/imageiotest.hh
/usr/include/mia-2.2/mia/3d/imagetest.hh
/usr/include/mia-2.2/mia/3d/interpolator.cxx
/usr/include/mia-2.2/mia/3d/interpolator.hh
/usr/include/mia-2.2/mia/3d/iterator.cxx
/usr/include/mia-2.2/mia/3d/iterator.hh
/usr/include/mia-2.2/mia/3d/landmark.hh
/usr/include/mia-2.2/mia/3d/landmarklist.hh
/usr/include/mia-2.2/mia/3d/landmarklistio.hh
/usr/include/mia-2.2/mia/3d/maskedcost.hh
/usr/include/mia-2.2/mia/3d/matrix.hh
/usr/include/mia-2.2/mia/3d/model.hh
/usr/include/mia-2.2/mia/3d/multicost.hh
/usr/include/mia-2.2/mia/3d/multireg.hh
/usr/include/mia-2.2/mia/3d/nfg.hh
/usr/include/mia-2.2/mia/3d/nonrigidregister.hh
/usr/include/mia-2.2/mia/3d/orientation.hh
/usr/include/mia-2.2/mia/3d/ppmatrix.hh
/usr/include/mia-2.2/mia/3d/quaternion.hh
/usr/include/mia-2.2/mia/3d/register.hh
/usr/include/mia-2.2/mia/3d/rigidregister.hh
/usr/include/mia-2.2/mia/3d/rot.hh
/usr/include/mia-2.2/mia/3d/shape.hh
/usr/include/mia-2.2/mia/3d/similarity_profile.hh
/usr/include/mia-2.2/mia/3d/splinetransformpenalty.hh
/usr/include/mia-2.2/mia/3d/stackdisttrans.hh
/usr/include/mia-2.2/mia/3d/timestep.hh
/usr/include/mia-2.2/mia/3d/trackpoint.hh
/usr/include/mia-2.2/mia/3d/trait.hh
/usr/include/mia-2.2/mia/3d/transform.hh
/usr/include/mia-2.2/mia/3d/transformfactory.hh
/usr/include/mia-2.2/mia/3d/transformio.hh
/usr/include/mia-2.2/mia/3d/transformmock.hh
/usr/include/mia-2.2/mia/3d/valueattributetranslator.hh
/usr/include/mia-2.2/mia/3d/vector.hh
/usr/include/mia-2.2/mia/3d/vectorfield.hh
/usr/include/mia-2.2/mia/3d/vfio.hh
/usr/include/mia-2.2/mia/3d/vfiotest.hh