/usr/include/vxl/contrib/vpro/ is in libvxl1-dev 1.14.0-14.
This file is owned by root:root, with mode 0o755.
..
/usr/include/vxl/contrib/vpro/vpro_edge_line_process.h
/usr/include/vxl/contrib/vpro/vpro_edge_process.h
/usr/include/vxl/contrib/vpro/vpro_epipolar_space_process.h
/usr/include/vxl/contrib/vpro/vpro_fourier_params.h
/usr/include/vxl/contrib/vpro/vpro_fourier_process.h
/usr/include/vxl/contrib/vpro/vpro_frame_diff_params.h
/usr/include/vxl/contrib/vpro/vpro_frame_diff_process.h
/usr/include/vxl/contrib/vpro/vpro_grid_finder_process.h
/usr/include/vxl/contrib/vpro/vpro_harris_corner_process.h
/usr/include/vxl/contrib/vpro/vpro_ihs_process.h
/usr/include/vxl/contrib/vpro/vpro_line_fit_process.h
/usr/include/vxl/contrib/vpro/vpro_lucas_kanade_process.h
/usr/include/vxl/contrib/vpro/vpro_motion_params.h
/usr/include/vxl/contrib/vpro/vpro_motion_process.h
/usr/include/vxl/contrib/vpro/vpro_region_process.h
/usr/include/vxl/contrib/vpro/vpro_spatial_filter_params.h
/usr/include/vxl/contrib/vpro/vpro_spatial_filter_process.h
/usr/include/vxl/contrib/vpro/vpro_video_process.h
/usr/include/vxl/contrib/vpro/vpro_video_process_sptr.h
/usr/include/vxl/contrib/vpro/vpro_vil_video_process.h
/usr/include/vxl/contrib/vpro/vpro_vil_video_process_sptr.h