If opencv4tegra is installed, it is in /usr :
ls -d /usr/include/opencv*
/usr/include/opencv /usr/include/opencv2
ls /usr/lib/libopencv*
/usr/lib/libopencv_calib3d.so
/usr/lib/libopencv_calib3d.so.2.4
/usr/lib/libopencv_calib3d.so.2.4.13
/usr/lib/libopencv_contrib.so
/usr/lib/libopencv_contrib.so.2.4
/usr/lib/libopencv_contrib.so.2.4.13
/usr/lib/libopencv_core.so
/usr/lib/libopencv_core.so.2.4
/usr/lib/libopencv_core.so.2.4.13
/usr/lib/libopencv_detection_based_tracker.so
/usr/lib/libopencv_detection_based_tracker.so.2.4
/usr/lib/libopencv_detection_based_tracker.so.2.4.13
/usr/lib/libopencv_esm_panorama.so
/usr/lib/libopencv_esm_panorama.so.2.4
/usr/lib/libopencv_esm_panorama.so.2.4.13
/usr/lib/libopencv_facedetect.so
/usr/lib/libopencv_facedetect.so.2.4
/usr/lib/libopencv_facedetect.so.2.4.13
/usr/lib/libopencv_features2d.so
/usr/lib/libopencv_features2d.so.2.4
/usr/lib/libopencv_features2d.so.2.4.13
/usr/lib/libopencv_flann.so
/usr/lib/libopencv_flann.so.2.4
/usr/lib/libopencv_flann.so.2.4.13
/usr/lib/libopencv_gpu.so
/usr/lib/libopencv_gpu.so.2.4
/usr/lib/libopencv_gpu.so.2.4.13
/usr/lib/libopencv_highgui.so
/usr/lib/libopencv_highgui.so.2.4
/usr/lib/libopencv_highgui.so.2.4.13
/usr/lib/libopencv_imgproc.so
/usr/lib/libopencv_imgproc.so.2.4
/usr/lib/libopencv_imgproc.so.2.4.13
/usr/lib/libopencv_imuvstab.so
/usr/lib/libopencv_imuvstab.so.2.4
/usr/lib/libopencv_imuvstab.so.2.4.13
/usr/lib/libopencv_legacy.so
/usr/lib/libopencv_legacy.so.2.4
/usr/lib/libopencv_legacy.so.2.4.13
/usr/lib/libopencv_ml.so
/usr/lib/libopencv_ml.so.2.4
/usr/lib/libopencv_ml.so.2.4.13
/usr/lib/libopencv_objdetect.so
/usr/lib/libopencv_objdetect.so.2.4
/usr/lib/libopencv_objdetect.so.2.4.13
/usr/lib/libopencv_photo.so
/usr/lib/libopencv_photo.so.2.4
/usr/lib/libopencv_photo.so.2.4.13
/usr/lib/libopencv_stitching.so
/usr/lib/libopencv_stitching.so.2.4
/usr/lib/libopencv_stitching.so.2.4.13
/usr/lib/libopencv_superres.so
/usr/lib/libopencv_superres.so.2.4
/usr/lib/libopencv_superres.so.2.4.13
/usr/lib/libopencv_tegra.so
/usr/lib/libopencv_tegra.so.2.4
/usr/lib/libopencv_tegra.so.2.4.13
/usr/lib/libopencv_ts.a
/usr/lib/libopencv_video.so
/usr/lib/libopencv_video.so.2.4
/usr/lib/libopencv_video.so.2.4.13
/usr/lib/libopencv_videostab.so
/usr/lib/libopencv_videostab.so.2.4
/usr/lib/libopencv_videostab.so.2.4.13
/usr/lib/libopencv_vstab.so
/usr/lib/libopencv_vstab.so.2.4
/usr/lib/libopencv_vstab.so.2.4.13