CompreFace

CompreFace

• Overview
• Features
• Getting started
• Simple tutorial of usage
• How it works
  • ML technologies
  • Used ML Papers and Algorithms
• Technologies
  • Architecture diagram
  • Database
  • Platform server
  • API server
  • Embedding server
• Rest API description
  • Add an example of the face
  • Recognize faces from given image
  • List of all saved faces
  • Delete all examples of the face by name
  • Delete an example of the face by ID
  • Verify faces from given image
• Contributing
  • Formatting standards
  • Report Bugs
  • Submit Feedback
• License info

Overview

CompreFace is the application for face recognition that can be integrated as a standalone server or deployed on cloud, and can be set up and used without machine learning knowledge.

We use one of the most popular face recognition methods based on deep neural networks, and provide a convenient API for Face Collection training and face recognition. We also provide a convenient roles system with which you can easily control who has access to the Face Collection.

Every user can create several Face Collections trained on different subsets of people.

Features

The system shows sufficient accuracy even if only one example for each face is used.

CompreFace is:

• opensource code and fully on-premise (security of your data)
• can be set up and used without machine learning knowledge
• used one of the most popular face recognition methods with high accuracy face recognizing
• UI panel with roles for access control
• fast start with one docker command

Getting started

To get started, perform the following steps:

1. Install Docker
2. Download archive from our latest release: https://github.com/exadel-inc/CompreFace/releases
3. Unzip archive
4. Run command: docker-compose up --build
5. Open http://localhost:8000/

** Tips for Windows** (use Git Bash terminal)

1. Turn of the git autocrlf with command: git config --global core.autocrlf false
2. Make sure all your containers are down: $ docker ps
3. In case some containers are working, they should be stopped: $ docker-compose down
4. Clean all local datebases and images: docker system prune --volumes
5. Last line in /dev/start.sh file change to docker-compose -f docker-compose.yml up --remove-orphans --build
6. Go to Dev folder cd dev
7. Run sh start.sh and make sure http://localhost:8000/ starts
8. Stopped all containers: $ docker-compose down
9. Run sh start--dev.sh and make sure http://localhost:4200/ starts

Simple tutorial of usage

Simple tutorial of usage

Step 1. You need to sign up to the system (First user in CompareFace admin has Owner role, but it is possible to change the role) and then LogIn with created account or just use the existing one. After that system redirects you to the main page.

Step 2. Create an application (left section) with "Create" link at the bottom of the page. An application is where you can create and manage your face collections.

Step 3. Enter you application with double click on the name of the application. Here you will have two possibilities. The first one is to add new users to your application and manage permissions ( Global Owner and Administrator roles already have access to any application without invite, user role doesn't.) The second one is to create face collections.

Step 4. After creating new collection, it appears at the Face Collections List created within the application with an appropriate name and API key. The user has the possibility to add new Face or to test the existing one (three dots on right side and click "test" link). This option will lead the user to Test Face Collection page, where is the drag&drop to upload image with face to recognize. We recommend an image size no higher than 5MB, as it could slow down the request process. Supported image formats are JPEG/PNG/JPG/ICO/BMP/GIF/TIF/TIFF format.

Step 5. Upload your photo and let Face Recognition system compare faces. When you have face contour detection enabled (green borders around the face). These points represent the shape of the feature. API requests within the solution use RESTful API, and backend data collection. Read more about API With Face Recognition system APIs you can add Face Recognition capabilities using simple API Calls.

The following result Json illustrates how these points map to a face, where

1. subject -person identificator
2. similarity - gives the confidence that this is the found subject
3. probability - gives the confidence that this is a face
4. x_min, x_max, y_min, y_max are coordinates of the face in the image

"result": [
{
  "box": {
    "probability": 0.99583,
    "x_max": 551,
    "y_max": 364,
    "x_min": 319,
    "y_min": 55
  },
  "faces": [
  {
    "similarity": 0.99593,
    "face_name": "lisan"
  }
  ]
}
]

The following JavaScript code example allows to add new face to Face Collection.

 async function saveNewImageToFaceCollection() {
  let name = encodeURIComponent('John');
  let formData = new FormData();
  let photo = document.getElementById("fileDropRef").files[0];

    formData.append("photo", photo);

    try {
       let r = await fetch('http://localhost:8000/api/v1/faces/?subject=`${name}`', {method: "POST", body: formData});
     } catch(e) {
       console.log('Houston, we have a problem...:', e);
    }

 }

This function sends image to our server and shows result in text area:

function recognizeFace(input) {

  async function getData() {
    let response = await fetch('http://localhost:8000/api/v1/recognize')
    let data = await response.json()
    return data
  };

  let result = Promise.resolve(response)
    result.then(data => {
    document.getElementById("result-textarea-request").innerHTML = JSON.stringify(data);
  });
}

How it works

Finding a face

Detecting one or more faces in an image. Multi-task Cascaded Convolutional Neural Networks (MTCNN) was used for face recognition.

Posing and projecting faces

Normalization of all found faces with rotate, scale and shear.

Calculate embedding from faces

Calculating embedding and classifying the face based on extracted features. We took CNN for face recognition and the last 3 fully connected layers were removed. As a result, - NN calculates embedding.

Use embedding for recognize/verify faces using embedding

Recognizing the person in the photo. We calculate Euclidean distance using Nd4j to determine the level of matching faces.

ML technologies

• MTCNN (Multi-task Cascaded Convolutional Networks)
• FaceNet
• Euclidean distance

Used ML Papers and Algorithms

• FaceNet: A Unified Embedding for Face Recognition and Clustering Florian Schroff, Dmitry Kalenichenko, James Philbin (Submitted on 17 Jun 2015)

• Joint Face Detection and Alignment using Multi-task Cascaded Convolutional Neural Networks Kaipeng Zhang, Zhanpeng Zhang, Zhifeng Li, Yu Qiao (Submitted on 11 Apr 2016)

• Inception-v4, Inception-ResNet and the Impact of Residual Connections on Learning Christian Szegedy, Sergey Ioffe, Vincent Vanhoucke, Alex Alemi (Submitted on 23 Aug 2016)

Technologies

Architecture diagram

Database

• PostgreSQL

Platform server

• Java 11
• Spring Boot

API server

• Java 11
• Spring Boot
• Nd4j

Embedding server

• Python
• FaceNet
• InsightFace
• TensorFlow
• SciPy
• NumPy
• OpenCV (for images resizing)

Rest API description

By using the created API key, the user can add an image as an example of the face, retrieve a list of saved images, recognize a face from the uploaded image the Face Collection, and delete all examples of the face by the name.

Add an example of the face

Creates an example of the face by saving images. To train the system, you can add as many images as you want.

curl  -X POST "http://localhost:8000/api/v1/faces?subject=<subject>&det_prob_threshold=<det_prob_threshold>" \
-H "Content-Type: multipart/form-data" \
-H "x-api-key: <faces_collection_api_key>" \
-F file=@<local_file> 

Element	Description	Type	Required	Notes
Content-Type	header	string	required	multipart/form-data
x-api-key	header	string	required	api key of the Face Collection, created by the user
subject	param	string	required	is the name you assign to the image you save
det_prob_ threshold	param	string	optional	minimum required confidence that a recognized face is actually a face. Value is between 0.0 and 1.0. Default value: 0.65
file	body	image	required	allowed image formats: jpeg, jpg, ico, png, bmp, gif, tif, tiff, webp. Max size is 5Mb

Response body on success:

{
  "image_id": "<UUID>",
  "subject": "<subject>"
}

Element	Type	Description
image_id	UUID	UUID of uploaded image
subject	string	of saved image

Recognize faces from given image

Recognizes faces from the uploaded image.

curl  -X POST "http://localhost:8000/api/v1/faces/recognize?limit=<limit>&prediction_count=<prediction_count>&det_prob_threshold=<det_prob_threshold>" \
-H "Content-Type: multipart/form-data" \
-H "x-api-key: <faces_collection_api_key>" \
-F file=<local_file>

Element	Description	Type	Required	Notes
Content-Type	header	string	required	multipart/form-data
x-api-key	header	string	required	api key of the Face Collection, created by the user
file	body	image	required	allowed image formats: jpeg, jpg, ico, png, bmp, gif, tif, tiff, webp. Max size is 5Mb
limit	param	integer	optional	maximum number of faces with best similarity in result. Value of 0 represents no limit. Default value: 0
det_prob_ threshold	param	string	optional	minimum required confidence that a recognized face is actually a face. Value is between 0.0 and 1.0. Default value: 0.65
prediction_count	param	integer	optional	maximum number of predictions per faces. Default value: 1

Response body on success:

{
  "result": [
    {
      "box": {
        "probability": <probability>,
        "x_max": <integer>,
        "y_max": <integer>,
        "x_min": <integer>,
        "y_min": <integer>
      },
      "faces": [
        {
          "similarity": <similarity1>,
          "subject": <subject1>	
        },
        ...
      ]
    }
  ]
}

Element	Type	Description
box	object	list of parameters of the bounding box for this face
probability	float	probability that a found face is actually a face
x_max, y_max, x_min, y_min	integer	coordinates of the frame containing the face
faces	list	list of similar faces with size of <prediction_count> order by similarity
similarity	float	similarity that on that image predicted person
subject	string	name of the subject in Face Collection

List of all saved faces

Retrieves a list of images saved in a Face Collection

curl  -X GET "http://localhost:8000/api/v1/faces" \
-H "x-api-key: <faces_collection_api_key>" \

Element	Description	Type	Required	Notes
x-api-key	header	string	required	api key of the Face Collection, created by the user

Response body on success:

{
  "faces": [
    {
      "image_id": <image_id>,
      "subject": <subject>
    },
    ...
  ]
}

Element	Type	Description
image_id	UUID	UUID of the face
subject	string	of the person, whose picture was saved for this api key

Delete all examples of the face by name

Deletes all image examples of the .

curl  -X DELETE "http://localhost:8000/api/v1/faces?subject=<subject>" \
-H "x-api-key: <faces_collection_api_key>"

Element	Description	Type	Required	Notes
x-api-key	header	string	required	api key of the Face Collection, created by the user
subject	param	string	optional	is the name you assign to the image you save. Caution! If this parameter is absent, all faces in Face Collection will be removed

Response body on success:

[
  {
    "image_id": <image_id>,
    "subject": <subject>
  },
  ...
]

Element	Type	Description
image_id	UUID	UUID of the removed face
subject	string	of the person, whose picture was saved for this api key

Delete an example of the face by ID

Deletes an image by ID.

curl  -X DELETE "http://localhost:8000/api/v1/faces/<image_id>" \
-H "x-api-key: <faces_collection_api_key>"

Element	Description	Type	Required	Notes
x-api-key	header	string	required	api key of the Face Collection, created by the user
image_id	variable	UUID	required	UUID of the removing face

Response body on success:

{
  "image_id": <image_id>,
  "subject": <subject>
}

Element	Type	Description
image_id	UUID	UUID of the removed face
subject	string	of the person, whose picture was saved for this api key

Verify faces from given image

Compares faces from the uploaded image with face in saved image id.

curl  -X POST "http://localhost:8000/api/v1/faces/<image_id>/verify?limit=<limit>&det_prob_threshold=<det_prob_threshold>" \
-H "Content-Type: multipart/form-data" \
-H "x-api-key: <faces_collection_api_key>" \
-F file=<local_file>

Element	Description	Type	Required	Notes
Content-Type	header	string	required	multipart/form-data
x-api-key	header	string	required	api key of the Face Collection, created by the user
image_id	variable	UUID	required	UUID of the verifying face
file	body	image	required	allowed image formats: jpeg, jpg, ico, png, bmp, gif, tif, tiff, webp. Max size is 5Mb
limit	param	integer	optional	maximum number of faces with best similarity in result. Value of 0 represents no limit. Default value: 0
det_prob_ threshold	param	string	optional	minimum required confidence that a recognized face is actually a face. Value is between 0.0 and 1.0. Default value: 0.65

Response body on success:

{
  "result": [
    {
      "box": {
        "probability": <probability>,
        "x_max": <integer>,
        "y_max": <integer>,
        "x_min": <integer>,
        "y_min": <integer>
      },
      "similarity": <similarity1>
    },
    ...
  ]
}

Element	Type	Description
box	object	list of parameters of the bounding box for this face
probability	float	probability that a found face is actually a face
x_max, y_max, x_min, y_min	integer	coordinates of the frame containing the face
similarity	float	similarity that on that image predicted person
subject	string	name of the subject in Face Collection

Contributing

Contributions are welcomed and greatly appreciated.

After creating your first contributing PR you will be requested to sign our Contributor License Agreement by commenting your PR with a special message.

Formatting standards

For java just import dev/team_codestyle.xml file in your IntelliJ IDEA

Report Bugs

Report bugs at https://github.com/exadel-inc/CompreFace/issues.

If you are reporting a bug, please include:

• Your operating system name and version.
• Any details about your local setup that might be helpful in troubleshooting.
• Detailed steps to reproduce the bug.

Submit Feedback

The best way to send feedback is to file an issue at https://github.com/exadel-inc/CompreFace/issues.

If you are proposing a feature, please:

• Explain in detail how it should work.
• Keep the scope as narrow as possible, to make it easier to implement.

License info

CompreFace is Open Source software released under the Apache 2.0 license.