/usr/include/x86_64-linux-gnu/visp3/ is in libvisp-tt-dev 3.1.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/x86_64-linux-gnu/visp3/tt/
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTracker.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerBSpline.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerHeader.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerSSD.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerSSDESM.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerSSDForwardAdditional.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerSSDForwardCompositional.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerSSDInverseCompositional.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerTriangle.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerWarp.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerWarpAffine.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerWarpHomography.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerWarpHomographySL3.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerWarpRT.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerWarpSRT.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerWarpTranslation.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerZNCC.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerZNCCForwardAdditional.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerZNCCInverseCompositional.h
/usr/include/x86_64-linux-gnu/visp3/tt/vpTemplateTrackerZone.h
/usr/include/x86_64-linux-gnu/visp3/visp_tt.h