Face_Recognition/README.rst

Face recognition from camera with Dlib
######################################

Introduction
************

Detect and recognize single/multi-faces from camera;

调用摄像头进行人脸识别，支持多张人脸同时识别;


#. 摄像头人脸录入 / Face register

   .. image:: introduction/get_face_from_camera.png
      :align: center

   请不要离摄像头过近，人脸超出摄像头范围时会有 "OUT OF RANGE" 提醒 /
   Please do not too close to the camera, or you can't save faces with "OUT OF RANGE" warning;

   .. image:: introduction/get_face_from_camera_out_of_range.png
      :align: center

#. 提取特征建立人脸数据库 / Generate database from images captured
#. 利用摄像头进行人脸识别 / Face recognizer
   
   当单张人脸 / When single-face:
   
   .. image:: introduction/face_reco_single_person.png
      :align: center

   当多张人脸 / When multi-faces:

   一张已录入人脸 + 未录入 unknown 人脸 / 1x known face + 1x unknown face:

   .. image:: introduction/face_reco_two_people.png
      :align: center

   同时识别多张已录入人脸 / multi-faces recognition at the same time:

   .. image:: introduction/face_reco_two_people_in_database.png
      :align: center

** 关于精度 / About accuracy:

* When using a distance threshold of ``0.6``, the dlib model obtains an accuracy of ``99.38%`` on the standard LFW face recognition benchmark.

Overview
********

此项目中人脸识别的实现流程 / The design of this repo:

.. image:: introduction/overview.png
   :align: center

Steps
*****

#. 下载源码 / Download zip from website or via GitHub Desktop in windows, or git clone in Ubuntu

   .. code-block:: bash

      git clone https://github.com/coneypo/Dlib_face_recognition_from_camera

#. 进行 face register / 人脸信息采集录入

   .. code-block:: bash

      python3 get_face_from_camera.py

#. 提取所有录入人脸数据存入 features_all.csv / Features extraction and save into features_all.csv

   .. code-block:: bash

      python3 features_extraction_to_csv.py

#. 调用摄像头进行实时人脸识别 / Real-time face recognition

   .. code-block:: bash

      python3 face_reco_from_camera.py


About Source Code
*****************

Repo 的 tree / 树状图:

::

    .
    ├── get_faces_from_camera.py        # Step1. Faces register
    ├── features_extraction_to_csv.py   # Step2. Features extraction
    ├── face_reco_from_camera.py        # Step3. Faces recognition
    ├── how_to_use_camera.py            # Use the default camera by opencv
    ├── data
    │   ├── data_dlib                   # Dlib's model
    │   │   ├── dlib_face_recognition_resnet_model_v1.dat
    │   │   ├── shape_predictor_5_face_landmarks.dat
    │   │   └── shape_predictor_68_face_landmarks.dat
    │   ├── data_faces_from_camera      # Face images captured from camera (will generate after step 1)
    │   │   ├── person_1
    │   │   │   ├── img_face_1.jpg
    │   │   │   └── img_face_2.jpg
    │   │   └── person_2
    │   │       └── img_face_1.jpg
    │   │       └── img_face_2.jpg
    │   └── features_all.csv            # CSV to save all the features of known faces (will generate after step 2)
    ├── introduction                    # Some files for readme.rst
    │   ├── Dlib_Face_recognition_by_coneypo.pptx
    │   ├── face_reco_single_person_customize_name.png
    │   ├── face_reco_single_person.png
    │   ├── face_reco_two_people_in_database.png
    │   ├── face_reco_two_people.png
    │   ├── get_face_from_camera_out_of_range.png
    │   ├── get_face_from_camera.png
    │   └── overview.png
    ├── README.rst
    └── requirements.txt            # Some python packages needed

用到的 Dlib 相关模型函数:

#. Dlib 正向人脸检测器 (based on HOG), output: <class 'dlib.dlib.rectangles'>


   .. code-block:: python

      detector = dlib.get_frontal_face_detector()
      faces = detector(img_gray, 0)

	  
#. Dlib 人脸预测器, output: <class 'dlib.dlib.full_object_detection'>

   .. code-block:: python

      predictor = dlib.shape_predictor("data/data_dlib/shape_predictor_5_face_landmarks.dat")
      shape = predictor(img_rd, faces[i])

	  
#. 特征描述子 Face recognition model, the object maps human faces into 128D vectors


   .. code-block:: python

      face_rec = dlib.face_recognition_model_v1("data/data_dlib/dlib_face_recognition_resnet_model_v1.dat")


Python 源码介绍如下:

#. get_face_from_camera.py: 

   进行 Face register / 人脸信息采集录入

   * 请注意存储人脸图片时，矩形框不要超出摄像头范围，要不然无法保存到本地;
   * 超出会有 "out of range" 的提醒;


#. features_extraction_to_csv.py:
     
   从上一步存下来的图像文件中，提取人脸数据存入CSV;
  
   * 会生成一个存储所有特征人脸数据的 "features_all.csv"；
   * size: n*128 , n means n people you registered and 128 means 128D features of the face


#. face_reco_from_camera.py: 

   这一步将调用摄像头进行实时人脸识别; / This part will implement real-time face recognition;
  
   * Compare the faces captured from camera with the faces you have registered which are saved in "features_all.csv"
   
   * 将捕获到的人脸数据和之前存的人脸数据进行对比计算欧式距离, 由此判断是否是同一个人;
   

More
****

Tips:

#. 如果希望详细了解 dlib 的用法，请参考 Dlib 官方 Python api 的网站 / You can refer to this link for more information of how to use dlib: http://dlib.net/python/index.html

#. Windows下建议不要把代码放到 ``C:\``, 可能会出现权限读取问题 / In windows, we will not recommend that running this repo in dir ``C:\``

#. 代码最好不要有中文路径 / No chinese characters in your code directory

#. 人脸录入的时候先建文件夹再保存图片, 先 ``N`` 再 ``S`` / Press ``N`` before ``S``

可以访问我的博客获取本项目的更详细介绍，如有问题可以邮件联系我 /
For more details, please refer to my blog (in chinese) or mail to me :

* Blog: https://www.cnblogs.com/AdaminXie/p/9010298.html
  
* Mail: coneypo@foxmail.com ( Dlib 相关 repo 问题请联系 @foxmail 而不是 @intel )


仅限于交流学习, 商业合作勿扰;

Thanks for your support.