/usr/include/vxl/contrib/conversions/ is in libvxl1-dev 1.17.0.dfsg-1+b2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/vxl/contrib/conversions/container/
/usr/include/vxl/contrib/conversions/container/CoolArray_to_CoolList.h
/usr/include/vxl/contrib/conversions/container/CoolArray_to_vcl_list.h
/usr/include/vxl/contrib/conversions/container/CoolArray_to_vcl_vector.h
/usr/include/vxl/contrib/conversions/container/CoolList_to_CoolArray.h
/usr/include/vxl/contrib/conversions/container/CoolList_to_vcl_list.h
/usr/include/vxl/contrib/conversions/container/CoolList_to_vcl_vector.h
/usr/include/vxl/contrib/conversions/container/vcl_list_to_CoolArray.h
/usr/include/vxl/contrib/conversions/container/vcl_list_to_CoolList.h
/usr/include/vxl/contrib/conversions/container/vcl_list_to_vcl_vector.h
/usr/include/vxl/contrib/conversions/container/vcl_vector_to_CoolArray.h
/usr/include/vxl/contrib/conversions/container/vcl_vector_to_CoolList.h
/usr/include/vxl/contrib/conversions/container/vcl_vector_to_vcl_list.h
/usr/include/vxl/contrib/conversions/container/vcl_vector_to_vnl_vector.h
/usr/include/vxl/contrib/conversions/container/vnl_vector_to_vcl_vector.h
/usr/include/vxl/contrib/conversions/geometry/
/usr/include/vxl/contrib/conversions/geometry/DigitalCurve_to_vdgl.h
/usr/include/vxl/contrib/conversions/geometry/osl_to_vdgl.h
/usr/include/vxl/contrib/conversions/image/
/usr/include/vxl/contrib/conversions/image/Image_to_vil1.h
/usr/include/vxl/contrib/conversions/image/vbl_array_to_vil1.h
/usr/include/vxl/contrib/conversions/image/vil1_to_Image.h
/usr/include/vxl/contrib/conversions/image/vil1_to_vbl_array.h
/usr/include/vxl/contrib/conversions/math/
/usr/include/vxl/contrib/conversions/math/CoolMatrix_to_vnl_matrix.h
/usr/include/vxl/contrib/conversions/math/CoolVector_to_vnl_vector.h
/usr/include/vxl/contrib/conversions/math/IUE_matrix_to_vnl_matrix.h
/usr/include/vxl/contrib/conversions/math/IUE_vector_to_vnl_vector.h
/usr/include/vxl/contrib/conversions/math/vbl_array_to_vnl_matrix.h
/usr/include/vxl/contrib/conversions/math/vbl_array_to_vnl_vector.h
/usr/include/vxl/contrib/conversions/math/vnl_matrix_to_CoolMatrix.h
/usr/include/vxl/contrib/conversions/math/vnl_matrix_to_IUE_matrix.h
/usr/include/vxl/contrib/conversions/math/vnl_matrix_to_vbl_array.h
/usr/include/vxl/contrib/conversions/math/vnl_vector_to_CoolVector.h
/usr/include/vxl/contrib/conversions/math/vnl_vector_to_IUE_vector.h
/usr/include/vxl/contrib/conversions/math/vnl_vector_to_vbl_array.h