The source code should be made a little change in Ubuntu 16.04

[coolxxy]

On Ubuntu 16.04, if you installed opencv from repository by apt such as apt install libopencv, you should change some code in file src/akaze_* and src/lib/utils.cpp
such as
#include <opencv2/calib3d.hpp>
#include <opencv2/imgproc.hpp>
to
#include <opencv2/calib3d/calib3d.hpp>
#include <opencv2/imgproc/imgproc.hpp>.