Include in the opencv header file

Opencv2.1 is the first practice:

# Include "cv. H"

This paper ..... You only need to configure the environment variables...

After the new version, everyone is used to this:

# Include <opencv2/highgui. HPP>

..

It's hard to figure out .... Analysis:

The new include path is;
D: \ Program Files \ opencv \ build \ include \ opencv;D: \ Program Files \ opencv \ build \ include \ opencv2;D: \ Program
Files \ opencv \ build \ include;

Take a look at this directory:

Opencv directory:

Opencv2

Therefore, if you use the traditional method to include files,/opencv is configured in the environment directory ..

What about the new method? /Which of the following folders should be included in opencv2?

Amount... Take a look at opencv. HPP

# Ifndef _ opencv_all_hpp __
# DEFINE _ opencv_all_hpp __

# Include "opencv2/CORE/core_c.h"
# Include "opencv2/CORE. HPP"
# Include "opencv2/FLANN/miniflann. HPP"
# Include "opencv2/imgproc/imgproc_c.h"
# Include "opencv2/imgproc. HPP"
# Include "opencv2/Photo/photo. HPP"
# Include "opencv2/Video/video. HPP"
# Include "opencv2/features2d/features2d. HPP"
# Include "opencv2/objdetect. HPP"
# Include "opencv2/calib3d/calib3d. HPP"
# Include "opencv2/ml. HPP"
# Include "opencv2/highgui/highgui_c.h"
# Include "opencv2/highgui. HPP"
# Include "opencv2/contrib. HPP"

# Endif

Haha contains all the header files under/opencv2... If you do not know the specific include, you can directly

# Include <opencv2/opencv. HPP> .....