Make it clear in advance , The environment version I built is 2.4.9（ Very old version , They all have basic functions ） Source code installation .

1. Install dependent files

sudo apt-get update
sudo apt-get install build-essential
sudo apt-get install cmake
sudo apt-get install libgtk2.0-dev
sudo apt-get install pkg-config
sudo apt-get install python-dev python-numpy
sudo apt-get install libavcodec-dev libavformat-dev libswscale-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev

2. Download the source file

1. Create a new one in your home directory opencv（ It's just a name , What name do you like to call , No effect , Here we use opencv Instead of ） Folder

2. Then download opencv Source code

wget http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.4.9/opencv-2.4.9.zip/download opencv-2.4.9.zip （ This is the source code URL）

You can download raspberry tour directly , Download and move to opencv In the folder

3. decompression   upzip opencv-2.4.9.zip

3. compile

cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ..

sudo ldconfig

stay cmake There will be problems in the process , But there will be solutions ！

The first error message ：

/home/hiscene/Downloads/opencv-2.4.8.3/modules/contrib/src/chamfermatching.cpp:969:30: error: the compiler can assume that the address of ‘annotate_img’ will never be NULL [-Werror=address]
             if (&annotate_img!=NULL) {
                              ^
/home/hiscene/Downloads/opencv-2.4.8.3/modules/contrib/src/chamfermatching.cpp:1016:34: error: the compiler can assume that the address of ‘annotate_img’ will never be NULL [-Werror=address]
                 if (&annotate_img!=NULL) {
                                  ^
/home/hiscene/Downloads/opencv-2.4.8.3/modules/contrib/src/chamfermatching.cpp: In member function ‘cv::ChamferMatcher::Match* cv::ChamferMatcher::Matching::localChamferDistance(cv::Point, cv::Mat&, cv::Mat&, cv::ChamferMatcher::Template*, float)’:

/home/hiscene/Downloads/opencv-2.4.8.3/modules/contrib/src/chamfermatching.cpp:1111:25: error: the compiler can assume that the address of ‘orientation_img’ will never be NULL [-Werror=address]

AM_CFLAGS = -Wall -g $(MATCHBOX_PANEL_CFLAGS) \
        -I$(top_srcdir) -I$(top_builddir) -Werror

It means -Werror Get rid of

however opencv It's dependence cmake Compilation of , So according to the error information, you enter the corresponding directory , stay flags.make Found in the file -Werror=address, Remove it , Then save , Recompile is successful .

flags.make Files can be found directly in file management .

The second error message ：

usr/include/c++/6/cstdlib:75:25: fatal error: stdlib.h: There is no file or directory

cmake -D CMAKE_TYPE=RELEASE -DCMAKE_INSTALL_PREFIX=/usr/local.. -DENABLE_PRECOMPILED_HEADERS=OFF

This is the problem I encountered in compiling , If there is anything wrong , Welcome to point out ！

I'll post the code I use later , For your reference .

If you are downloading installation files or The download speed is very slow when installing dependency , It is suggested that you can replace apt Source （ That is, the software source ）, Here is my software source For your reference ：

 1 deb http://mirrors.aliyun.com/raspbian/raspbian/ jessie main non-free contrib
 2 deb-src http://mirrors.tuna.tsinghua.edu.cn/raspbian/raspbian/ jessie main non-free contrib

This path is in :/etc/apt modify sources.list file （ Need to add root Permission or direct sudo ）

Finished saving , Remember to update it ：

sudo apt-get update

sudo apt-get -y uograde

The first one above Alibaba cloud platform , The second is the mirror station of Tsinghua University , Download speed bar .

Use python Words , If you use pip If you want to manage your files , It is suggested that pip Source , Here is also my pip Source , For your reference ：

1 [global]
2 index-url = https://pypi.tuna.tsinghua.edu.cn/simple
3 [install]
4 trusted-host=mirrors.aliyun.com

This path is in ：/home/pi/.pip（.pip Folder ） modify pip.conf file （ If you don't have one, just create one ）

It's the same here , The first one is from Tsinghua University , The second is Ali's

May you , Don't innovate just because “ Speed ” And embarrassed ！！！