/usr/ is in libopencv-stitching-dev 2.4.8+dfsg1-2ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/opencv2/stitching/
/usr/share/
/usr/share/doc/
/usr/share/doc/libopencv-stitching-dev/
/usr/share/doc/libopencv-stitching-dev/copyright
/usr/include/
/usr/include/opencv2/
/usr/include/opencv2/stitching/detail/
/usr/include/opencv2/stitching/detail/matchers.hpp
/usr/include/opencv2/stitching/detail/util_inl.hpp
/usr/include/opencv2/stitching/detail/warpers.hpp
/usr/include/opencv2/stitching/detail/autocalib.hpp
/usr/include/opencv2/stitching/detail/exposure_compensate.hpp
/usr/include/opencv2/stitching/detail/blenders.hpp
/usr/include/opencv2/stitching/detail/util.hpp
/usr/include/opencv2/stitching/detail/camera.hpp
/usr/include/opencv2/stitching/detail/seam_finders.hpp
/usr/include/opencv2/stitching/detail/motion_estimators.hpp
/usr/include/opencv2/stitching/detail/warpers_inl.hpp
/usr/include/opencv2/stitching/warpers.hpp
/usr/include/opencv2/stitching/stitcher.hpp
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/libopencv_stitching.a
/usr/share/doc/libopencv-stitching-dev/changelog.Debian.gz
/usr/share/doc/libopencv-stitching-dev/README.Debian
/usr/lib/x86_64-linux-gnu/libopencv_stitching.so