乌班图下安装caffe

1.安装依赖

1 sudo apt-get install libprotobuf-dev libleveldb-dev libsnappy-dev libopencv-dev libhdf5-serial-dev protobuf-compiler
2 sudo apt-get install --no-install-recommends libboost-all-dev
3 sudo apt-get install libgflags-dev libgoogle-glog-dev liblmdb-dev
4 sudo apt-get install libatlas-base-dev

PYTHON需要2.7版本,这是操作系统本身已经安装好的. 输入python2.7 --version 会显示具体的版本号说明安装了.

但是还需要sudo apt-get install python-dev

2.下载Caffe 
使用Git直接下载Caffe非常简单，或者去https://github.com/BVLC/caffe下载。由于我习惯去github上找代码，所以就直接去下载的源码。

下载完成后，会在家目录下的下载里找到caffe-master.zip，用unzip命令解压到家目录下，然后重命名为caffe.

3.编译Caffe 
（1）切换到Caffe所在目录

cp Makefile.config.example Makefile.config

（2）修改配置文件Makefile.config

   打开配置文件 Makefile.config

gedit  Makefile.config

• CPU_ONLY := 1
• 配置一些引用文件（增加部分主要是解决新版本下，HDF5的路径问题）

INCLUDE_DIRS := $(PYTHON_INCLUDE)  /usr/local/include  /usr/include/hdf5/serial
LIBRARY_DIRS := $(PYTHON_LIB)  /usr/local/lib   /usr/lib /usr/lib/x86_64-linux-gnu/hdf5/serial
BLAS := atlas

计算能力 mkl > openlas >atlas

（3）编译 Caffe

make all 
make test 
make runtest

另外, 这个make默认是用CPU单核运算,如果想要快一点, 比如我想使用四核, 在make后面加上-j4标签。

如果上面4行某一行报错之后想要重试,建议先make clean再重新开始。

----------------------------------------------------------------------------------------------------------------

在服务器上装配caffe时，需要注意的地方：

1.cuda的具体位置要修改

2.编译不成功，修改，再编译之前需要make clean

3.

报如下错：

.build_debug/lib/libcaffe.so: undefined reference to `cv::imread(cv::String const&, int)'
.build_debug/lib/libcaffe.so: undefined reference to `cv::imencode(cv::String const&, cv::_InputArray const&, std::vector >&, std::vector > const&)'
.build_debug/lib/libcaffe.so: undefined reference to `cv::imdecode(cv::_InputArray const&, int)'
collect2: error: ld returned 1 exit status
.build_debug/lib/make: libcaffe.so: undefined *** [.build_debug/tools/upgrade_net_proto_text.bin] Error 1
referencemake: *** Waiting for unfinished jobs....
 to `cv.build_debug/lib/libcaffe.so: undefined reference to `cv::imread(cv::String const&, int)'
.build_debug/lib/libcaffe.so: undefined reference to `cv::imencode(cv::String const&, cv::_InputArray const&, std::vector >&, std::vector > const&)'
.build_debug/lib/libcaffe.so: undefined reference to `cv::imdecode(cv::/_InputArray const&, usrint)/bin/'ld: 
warning: libcudart.so.5.5, needed by /usr/local/lib/libopencv_core.so, may conflict withcollect2: error: ld returned 1 exit status
 libcudart.so.7.5
.build_debug/lib/libcaffe.so: undefined reference to `cv::imread(cv::String const&, int)'
.build_debug/lib/libcaffe.so: undefined reference to `cv::imencode(cv::String const&, cv::_InputArray const&, std::vector >&, std::vector. /> constlib&)'/libcaffe.so
.build_debug/: lib/undefined referencelibcaffe.so: to make:  `*** [.build_debug/tools/upgrade_net_proto_binary.bin] Error 1cvundefined: :referenceimread
( tocv:: `String cvconst&::imdecode, int(cv)'
.::_InputArraybuild_debug/ const&lib, int/)'
libcaffe.so: undefined reference to `cv::imencode(cv:collect2: error: ld returned 1 exit status
:String const&, cv::_InputArray const&, std::vector >&, std::vector > const&)'
.build_debug/lib/libcaffe.so: make: undefined reference*** [.build_debug/tools/caffe.bin] Error 1 to
 `cv::imdecode(cv::_InputArray const&, int)'
::imread(cv::String const&, int)'
collect2: error: ld returned 1 exit status
.build_debug/lib/libcaffe.so: undefined reference to `cv::imencode(cv::String const&, cv::_InputArray const&, std::vector >&, std::vector > const&)'
.build_debug/lib/libcaffe.so: undefined reference to `cv::imdecode(cv::_InputArray const&, int)'
make: *** [.build_debug/tools/extract_features.bin] Error 1collect2: error: ld returned 1 exit status

make: *** [.build_debug/tools/compute_image_mean.bin] Error 1
.build_debug/lib/libcaffe.so: undefined reference to `cv::imread(cv::String const&, int)'
.build_debug/lib/libcaffe.so: undefined reference to `cv::imencode(cv::String const&, cv::_InputArray const&, std::vector >&, std::vector > const&)'
.build_debug/lib/libcaffe.so: undefined reference to `cv::imdecode(cv::_InputArray const&, int)'
collect2: error: ld returned 1 exit status
make: *** [.build_debug/tools/convert_imageset.bin] Error 1
wangxiao@wangxiao-GTX980:/media/wangxiao/247317a3-e6b5-45d4-81d1-956930526746/---------------/caffe-master$ 

:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
Answer: https://github.com/BVLC/caffe/issues/2348 
But if you delete all the file in build(rm -rf ./build/*) before "make all",you will success.I just success
so, just input the code and make all -j8 again.

well, same problem... and change the following code in Makefile:
>>>>>>>>  LIBRARIES += opencv_core opencv_highgui opencv_imgproc 
into :    LIBRARIES += opencv_core opencv_highgui opencv_imgproc opencv_imgcodecs

yeah, just add the: opencv_imgcodecs  at last.  and it really worked.

解决的办法:

thus, the following steps may needed:

1. change the Makefile :(记得是Makefile文件)

　　add "opencv_imagecodecs" to the last of LIBRARIES += opencv_core opencv_highgui opencv_imgproc;

2. remove the files in build :

　　rm -rf ./build/*

3. make all -j8