先贴上链接：https://github.com/facebookresearch/Detectron
。。。Install Caffe2 就问题一大堆了。。。。
首先是下载完caffe2工程后，第一步的make ,就出现“Protocol "https" not supported or disabled in libcurl” 试了很多方法，都不管用，哎。
应该是curl的问题，不管了，反正系统已经重装了，现在一切正常，比以前还顺溜～
装个这玩意让我火大。直接重装系统！！！！！
全新的系统：Ubuntu14.04！！！
显卡：GTX 1080
本以为重装系统的话，cuda这玩意又要倒腾很久，已经做好了长期奋战的准备，结果 - - 时代在进步啊，要是当年有这么好装的话，我也不用装大半个月了。
废话不多说，总结下今天安装 caffe2 的过程。
一、 首先下载依赖项：
sudo apt-get updatesudo apt-get install -y --no-install-recommends \ build-essential \ cmake \ git \ libgoogle-glog-dev \ libgtest-dev \ libiomp-dev \ libleveldb-dev \ liblmdb-dev \ libopencv-dev \ libopenmpi-dev \ libsnappy-dev \ libprotobuf-dev \ openmpi-bin \ openmpi-doc \ protobuf-compiler \ python-dev \ python-pip sudo pip install \ future \ numpy \ protobuf
这里有个很重要的一步，可能会导致下面的pip安装失败以及opencv-python>=3.0无法安装：
sudo pip install --upgrade pip
那就是升级pip !!!!!!!!
对于ubuntu14.04 和 ubuntu16.04 两个系统要分别下不同的文件：
# for Ubuntu 14.04sudo apt-get install -y --no-install-recommends libgflags2# for Ubuntu 16.04sudo apt-get install -y --no-install-recommends libgflags-dev
========================以下是需要GPU的安装步骤，如果直接用CPU那么就跳过=================================
精彩的地方来了，这步安装cuda，简直是从 王者排位赛 一下子到 简单人机啊 !!.
我的是ubuntu14.04，所以按照这个步骤来：
sudo apt-get update && sudo apt-get install wget -y --no-install-recommendswget "http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1404/x86_64/cuda-repo-ubuntu1404_8.0.61-1_amd64.deb"sudo dpkg -i cuda-repo-ubuntu1404_8.0.61-1_amd64.debsudo apt-get updatesudo apt-get install cuda
对于16.04的系统，执行下面的步骤：
sudo apt-get update && sudo apt-get install wget -y --no-install-recommendswget "http://developer.download.nvidia.com/compute/cuda/repos/ubuntu1604/x86_64/cuda-repo-ubuntu1604_8.0.61-1_amd64.deb"sudo dpkg -i cuda-repo-ubuntu1604_8.0.61-1_amd64.debsudo apt-get updatesudo apt-get install cuda
CUDA就这么安装好了！！！！我都不敢相信
接下来装cudnn5.1或者6.0都行
CUDNN_URL="http://developer.download.nvidia.com/compute/redist/cudnn/v5.1/cudnn-8.0-linux-x64-v5.1.tgz"wget ${CUDNN_URL}sudo tar -xzf cudnn-8.0-linux-x64-v5.1.tgz -C /usr/localrm cudnn-8.0-linux-x64-v5.1.tgz && sudo ldconfig 完全不用了解中间涉及了什么，反正就这么装好了？！！！
=======================================================================================================
二、下载和编译caffe2
git clone --recursive https://github.com/caffe2/caffe2.git && cd caffe2make && cd build && sudo make install
注意看我用耀眼的红色标注出来的部分， --recursive 递归的意思，加上这个指令可以把third_party里面的文件一次性统统下载好。否则的话 third_party这个文件夹里就是空的！ （直接从caffe2/caffe2.git 网页上下载的话，也会缺失third_party内的文件）
第一条语句执行完成后，会在你执行这条语句的路径位置得到一个 caffe2 文件夹 ，&& cd caffe2 这个操作就是进入该文件夹内（如果直接浏览器下载 caffe2-master.zip,解压出来的文件夹名为caffe2-master)
然后就是make (最好是 make -j32 多线程编译会更快些），会生成一个build文件夹，cd build && sudo make install 这样caffe2就安装完成了！！！
三、测试caffe2是否安装成功：
这里需要注意，在Install文档后面也有补充，那就是这里的 caffe2.python 是指的在caffe2/build/ 下面的 caffe2 文件夹下的 python 文件夹。
可以在两种方法下执行下面的指令
1.进入 caffe2/python 这个文件夹下，然后再在终端中执行下面的指令
2.命令行中执行： export PYTHONPATH=/home/ username /caffe2/python:PYTHONPATH 这样系统在执行python文件时，会自动包含这个路径，那就可以在任意路径下执行下面的语句了。
python -c 'from caffe2.python import core' 2>/dev/null && echo "Success" || echo "Failure"
如果安装成功，会返回 Success ,否则就是Failure .
如果是GPU用户的话，还需要多执行一条测试指令：
python -m caffe2.python.operator_test.relu_op_test
可能会出现 ImportError: No module named hypothesis 不要紧张，sudo pip install hypothesis 。安装完后再试试上面的，应该就可以了。
最后建议将上面的路径都添加进 ～/.bashrc 文件的最后，这样就不用每次使用caffe2的时候都执行一次 export PYTHONPATH = 。。。。 了
sudo gedit ~/.bashrc #如果没装过 gedit ,先执行 sudo apt-get install gedit
在文件的末尾处添加如下语句：
export PYTHONPATH=/usr/local:$PYTHONPATHexport PYTHONPATH=/home/username/caffe2/build/caffe2/python:$PYTHONPATHexport PYTHONPATH=/home/username/caffe2/build:$PYTHONPATHexport LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
保存后，执行 source ~/.bashrc 使之生效。
到这里，caffe2 算是大功告成了。
插入段，我想既然caffe2已经把cuda装好了，那么是不是意味着我也可以直接装caffe呢。 是的！！
第一步也是安装依赖项，可能和caffe2有重复的，不管，这一步都输进去
sudo apt-get install freeglut3-dev build-essential libx11-dev libxmu-dev libxi-dev libgl1-mesa-glx libglu1-mesa libglu1-mesa-dev
接着在 ~/.bashrc文件末尾添加下面指令：
export PATH=/usr/local/cuda-8.0/bin:$PATH
然后是添加共享库变量，这一步在caffe2中没有用到，但是想通过caffe必须添加：
#在/etc/ld.so.conf.d/ 文件夹下新建 cuda.conf 文件，并添加内容：/usr/local/cuda-8.0/lib64
保存后，使指令生效：
sudo ldconfig
好了，终于到caffe编译这一步了。我把我的Makefile.config文件贴下，红色标注是我修改的地方：
## Refer to http://caffe.berkeleyvision.org/installation.html# Contributions simplifying and improving our build system are welcome!# cuDNN acceleration switch (uncomment to build with cuDNN).USE_CUDNN := 1# CPU-only switch (uncomment to build without GPU support).# CPU_ONLY := 1# uncomment to disable IO dependencies and corresponding data layers# USE_OPENCV := 0# USE_LEVELDB := 0# USE_LMDB := 0# uncomment to allow MDB_NOLOCK when reading LMDB files (only if necessary)# You should not set this flag if you will be reading LMDBs with any# possibility of simultaneous read and write# ALLOW_LMDB_NOLOCK := 1# Uncomment if you're using OpenCV 3# OPENCV_VERSION := 3# To customize your choice of compiler, uncomment and set the following.# N.B. the default for Linux is g++ and the default for OSX is clang++# CUSTOM_CXX := g++# CUDA directory contains bin/ and lib/ directories that we need.CUDA_DIR := /usr/local/cuda# On Ubuntu 14.04, if cuda tools are installed via# "sudo apt-get install nvidia-cuda-toolkit" then use this instead:# CUDA_DIR := /usr# CUDA architecture setting: going with all of them.# For CUDA < 6.0, comment the *_50 through *_61 lines for compatibility.# For CUDA < 8.0, comment the *_60 and *_61 lines for compatibility.# For CUDA >= 9.0, comment the *_20 and *_21 lines for compatibility.CUDA_ARCH :=-gencode arch=compute_30,code=sm_30 \ -gencode arch=compute_35,code=sm_35 \ -gencode arch=compute_50,code=sm_50 \ -gencode arch=compute_52,code=sm_52 \ -gencode arch=compute_60,code=sm_60 \ -gencode arch=compute_61,code=sm_61 \ -gencode arch=compute_61,code=compute_61# BLAS choice:# atlas for ATLAS (default)# mkl for MKL# open for OpenBlasBLAS := atlas# Custom (MKL/ATLAS/OpenBLAS) include and lib directories.# Leave commented to accept the defaults for your choice of BLAS# (which should work)!# BLAS_INCLUDE := /path/to/your/blas# BLAS_LIB := /path/to/your/blas# Homebrew puts openblas in a directory that is not on the standard search path# BLAS_INCLUDE := $(shell brew --prefix openblas)/include# BLAS_LIB := $(shell brew --prefix openblas)/lib# This is required only if you will compile the matlab interface.# MATLAB directory should contain the mex binary in /bin.# MATLAB_DIR := /usr/local# MATLAB_DIR := /Applications/MATLAB_R2012b.app# NOTE: this is required only if you will compile the python interface.# We need to be able to find Python.h and numpy/arrayobject.h.PYTHON_INCLUDE := /usr/include/python2.7 \ /usr/lib/python2.7/dist-packages/numpy/core/include# Anaconda Python distribution is quite popular. Include path:# Verify anaconda location, sometimes it's in root.# ANACONDA_HOME := $(HOME)/anaconda# PYTHON_INCLUDE := $(ANACONDA_HOME)/include \ # $(ANACONDA_HOME)/include/python2.7 \ # $(ANACONDA_HOME)/lib/python2.7/site-packages/numpy/core/include# Uncomment to use Python 3 (default is Python 2)# PYTHON_LIBRARIES := boost_python3 python3.5m# PYTHON_INCLUDE := /usr/include/python3.5m \# /usr/lib/python3.5/dist-packages/numpy/core/include# We need to be able to find libpythonX.X.so or .dylib.PYTHON_LIB := /usr/lib# PYTHON_LIB := $(ANACONDA_HOME)/lib# Homebrew installs numpy in a non standard path (keg only)# PYTHON_INCLUDE += $(dir $(shell python -c 'import numpy.core; print(numpy.core.__file__)'))/include# PYTHON_LIB += $(shell brew --prefix numpy)/lib# Uncomment to support layers written in Python (will link against Python libs)WITH_PYTHON_LAYER := 1# Whatever else you find you need goes here.INCLUDE_DIRS := $(PYTHON_INCLUDE) /usr/local/includeLIBRARY_DIRS := $(PYTHON_LIB) /usr/local/lib /usr/lib# If Homebrew is installed at a non standard location (for example your home directory) and you use it for general dependencies# INCLUDE_DIRS += $(shell brew --prefix)/include# LIBRARY_DIRS += $(shell brew --prefix)/lib# NCCL acceleration switch (uncomment to build with NCCL)# https://github.com/NVIDIA/nccl (last tested version: v1.2.3-1+cuda8.0)# USE_NCCL := 1# Uncomment to use `pkg-config` to specify OpenCV library paths.# (Usually not necessary -- OpenCV libraries are normally installed in one of the above $LIBRARY_DIRS.)# USE_PKG_CONFIG := 1# N.B. both build and distribute dirs are cleared on `make clean`BUILD_DIR := buildDISTRIBUTE_DIR := distribute# Uncomment for debugging. Does not work on OSX due to https://github.com/BVLC/caffe/issues/171# DEBUG := 1# The ID of the GPU that 'make runtest' will use to run unit tests.TEST_GPUID := 0# enable pretty build (comment to see full commands)Q ?= @
只有两处，随后：
make all -j32make test -j32make runtest -j32
最后来测试下，跑个MNIST数据集：
#下载数据集./data/mnist/get_mnist.sh#生成LMDB文件./example/mnist/create_mnist.sh#训练./example/mnist/train_lenet.sh
四、其他依赖项安装
①Python的依赖项：(这里之前一定要先升级pip，否则会安装失败）
pip install numpy pyyaml matplotlib opencv-python>=3.0 setuptools Cython mock
②COCO API安装：
# COCOAPI=/path/to/clone/cocoapigit clone https://github.com/cocodataset/cocoapi.git $COCOAPIcd $COCOAPI/PythonAPI# Install into global site-packagesmake install
五、Detectron 安装
# DETECTRON=/path/to/clone/detectrongit clone https://github.com/facebookresearch/detectron $DETECTRONcd $DETECTRON/lib && makecd ~python2 $DETECTRON/tests/test_spatial_narrow_as_op.py
如果到这里都没有问题的话，那么就可以Inference with Pretrained Models了；
cd Detectrom-masterpython2 tools/infer_simple.py \ --cfg configs/12_2017_baselines/e2e_mask_rcnn_R-101-FPN_2x.yaml \ --output-dir /tmp/detectron-visualizations \ --image-ext jpg \ --wts https://s3-us-west-2.amazonaws.com/detectron/35861858/12_2017_baselines/e2e_mask_rcnn_R-101-FPN_2x.yaml.02_32_51.SgT4y1cO/output/train/coco_2014_train:coco_2014_valminusminival/generalized_rcnn/model_final.pkl \ demo
程序运行结束后，会在/tmp/detection-visualizations 文件夹下以PDF的格式输出预测结果，下面是一个例子
INPUT:
OUTPUT:
六、下面开始下载COCO数据集
mkdir data &&cd datawget http://images.cocodataset.org/zips/test2014.zipwget http://images.cocodataset.org/zips/train2014.zipwget http://images.cocodataset.org/zips/val2014.zip
解压后，按如下格式存放：
coco|_ coco_train2014| |_.jpg| |_ ...| |_ .jpg|_ coco_val2014|_ ...|_ annotations |_ instances_train2014.json |_ ...
(这里注意,我下载完后还缺 " annotations/instances_minival2014.json " ,需要额外下载,并放在 annotations 文件夹下: https://s3-us-west-2.amazonaws.com/detectron/coco/coco_annotations_minival.tgz)
然后和Detectron项目建立软连接，注意这里一定要是绝对路径！以我的为例：
ln -s /home/cc/data/coco /home/cc/Detectron-master/lib/dataset/data/coco
至此，整个Detectron项目都已经配置完毕！！！开始飞翔吧
Ps: 如果想用Detectron在自己的数据集上训练一个模型，最好是把annotation转换成 COCO json Format .然后将新的数据集路径添加到 lib/datasets/dataset_catalog.py 中。