/usr/include/pcl-1.7/pcl/segmentation/ is in libpcl-dev 1.7.2-7.
This file is owned by root:root, with mode 0o755.
..
/usr/include/pcl-1.7/pcl/segmentation/approximate_progressive_morphological_filter.h
/usr/include/pcl-1.7/pcl/segmentation/boost.h
/usr/include/pcl-1.7/pcl/segmentation/comparator.h
/usr/include/pcl-1.7/pcl/segmentation/conditional_euclidean_clustering.h
/usr/include/pcl-1.7/pcl/segmentation/crf_normal_segmentation.h
/usr/include/pcl-1.7/pcl/segmentation/edge_aware_plane_comparator.h
/usr/include/pcl-1.7/pcl/segmentation/euclidean_cluster_comparator.h
/usr/include/pcl-1.7/pcl/segmentation/euclidean_plane_coefficient_comparator.h
/usr/include/pcl-1.7/pcl/segmentation/extract_clusters.h
/usr/include/pcl-1.7/pcl/segmentation/extract_labeled_clusters.h
/usr/include/pcl-1.7/pcl/segmentation/extract_polygonal_prism_data.h
/usr/include/pcl-1.7/pcl/segmentation/grabcut_segmentation.h
/usr/include/pcl-1.7/pcl/segmentation/ground_plane_comparator.h
/usr/include/pcl-1.7/pcl/segmentation/impl/
/usr/include/pcl-1.7/pcl/segmentation/impl/approximate_progressive_morphological_filter.hpp
/usr/include/pcl-1.7/pcl/segmentation/impl/conditional_euclidean_clustering.hpp
/usr/include/pcl-1.7/pcl/segmentation/impl/crf_normal_segmentation.hpp
/usr/include/pcl-1.7/pcl/segmentation/impl/extract_clusters.hpp
/usr/include/pcl-1.7/pcl/segmentation/impl/extract_labeled_clusters.hpp
/usr/include/pcl-1.7/pcl/segmentation/impl/extract_polygonal_prism_data.hpp
/usr/include/pcl-1.7/pcl/segmentation/impl/grabcut_segmentation.hpp
/usr/include/pcl-1.7/pcl/segmentation/impl/min_cut_segmentation.hpp
/usr/include/pcl-1.7/pcl/segmentation/impl/organized_connected_component_segmentation.hpp
/usr/include/pcl-1.7/pcl/segmentation/impl/organized_multi_plane_segmentation.hpp
/usr/include/pcl-1.7/pcl/segmentation/impl/planar_polygon_fusion.hpp
/usr/include/pcl-1.7/pcl/segmentation/impl/progressive_morphological_filter.hpp
/usr/include/pcl-1.7/pcl/segmentation/impl/region_growing.hpp
/usr/include/pcl-1.7/pcl/segmentation/impl/region_growing_rgb.hpp
/usr/include/pcl-1.7/pcl/segmentation/impl/sac_segmentation.hpp
/usr/include/pcl-1.7/pcl/segmentation/impl/seeded_hue_segmentation.hpp
/usr/include/pcl-1.7/pcl/segmentation/impl/segment_differences.hpp
/usr/include/pcl-1.7/pcl/segmentation/impl/supervoxel_clustering.hpp
/usr/include/pcl-1.7/pcl/segmentation/min_cut_segmentation.h
/usr/include/pcl-1.7/pcl/segmentation/organized_connected_component_segmentation.h
/usr/include/pcl-1.7/pcl/segmentation/organized_multi_plane_segmentation.h
/usr/include/pcl-1.7/pcl/segmentation/planar_polygon_fusion.h
/usr/include/pcl-1.7/pcl/segmentation/planar_region.h
/usr/include/pcl-1.7/pcl/segmentation/plane_coefficient_comparator.h
/usr/include/pcl-1.7/pcl/segmentation/plane_refinement_comparator.h
/usr/include/pcl-1.7/pcl/segmentation/progressive_morphological_filter.h
/usr/include/pcl-1.7/pcl/segmentation/region_3d.h
/usr/include/pcl-1.7/pcl/segmentation/region_growing.h
/usr/include/pcl-1.7/pcl/segmentation/region_growing_rgb.h
/usr/include/pcl-1.7/pcl/segmentation/rgb_plane_coefficient_comparator.h
/usr/include/pcl-1.7/pcl/segmentation/sac_segmentation.h
/usr/include/pcl-1.7/pcl/segmentation/seeded_hue_segmentation.h
/usr/include/pcl-1.7/pcl/segmentation/segment_differences.h
/usr/include/pcl-1.7/pcl/segmentation/supervoxel_clustering.h