/usr/include/x86_64-linux-gnu/visp3/ is in libvisp-visual-features-dev 3.0.0-4.
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/usr/include/x86_64-linux-gnu/visp3/visual_features/
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpBasicFeature.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureBuilder.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureDepth.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureEllipse.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureException.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureLine.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureLuminance.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureMoment.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureMomentAlpha.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureMomentArea.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureMomentAreaNormalized.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureMomentBasic.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureMomentCInvariant.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureMomentCentered.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureMomentCommon.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureMomentDatabase.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureMomentGravityCenter.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureMomentGravityCenterNormalized.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeaturePoint.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeaturePoint3D.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeaturePointPolar.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureSegment.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureThetaU.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureTranslation.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpFeatureVanishingPoint.h
/usr/include/x86_64-linux-gnu/visp3/visual_features/vpGenericFeature.h