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README.md

Face Recognition

Build Status Scrutinizer Code Quality Code Coverage Codacy Badge License

Nextcloud app that implement a basic facial recognition system.

FaceRecognition is a Nextcloud application with a goal of recognizing, analyzing and aggregating face data in users images, and providing additional functionalities on top of these information, all with built-in privacy of Nextcloud. Imagine Google Photos, but only for faces (not detecting objects…) and in such way that your images never leave your Nextcloud instance. 😃

The application listens to the creation of new image files, and queues them for later analysis. A scheduled task (Or admin on demand) take this queue, and analyze the images for looking faces and if possible identify them grouping by similarity.

App screenshots

How to use it?

The administrator must properly configure the application, and once it is working, the user must accept that he wants to allow the analysis of his images to discover his friends. Finally the user can use the application in three ways

  1. In the user settings there is a ‘Face Recognition’ panel where first of all each user must enable the analysis. Once enabled, you will progressively see the discovery of your friends, and you can assign them names.
  2. In the file application the user can search by typing your friend’s name, and it will show all the photos.
  3. In the side panel of the file application, a ‘Persons’ tab is added where you can see a list of your friends in the photo, and rename them.

Installation, configuration and usage

Requirements

Installation

Ideally once you meet the requirements, you can install and enable it from the nextcloud app store. For details and advanced information read the documentation about installation.

Configuration

Before proceeding to analyze the images, you must properly install and configure the pretrained models using the occ face:setup command. For details and advanced information read the documentation about models.

Then you must indicate the size of the images used in the temporary files from the Nextcloud settings panel. This configuration will depend on your installation and has a direct impact on memory consumption. For details and advanced information read the documentation about Temporary files.

Test the application

We recommend test the application intensively before proceeding to analyze the real data of the users. For this you can create a new user in your Nextcloud instance and upload some photos from the internet. Then you must run the occ face:background_job -u new_user -t 900 command for this user and evaluate the result. For details and advanced information read the documentation of this command below.

Schedule background job

The application is designed to run as a scheduled task. This allows analyze the photos and showing the results to the user progressively. You can read about some ways to configure it within our documentation about Schedule Background Task.

occ commands

The application add commands to the Nexcloud’s command-line interface.

Configure models

occ face:setup -m|--model [MODEL_ID]

This command is responsible for installing pretrained models. You must supply MODEL_ID indicating the model to install. If not supplied, it will list all available models.

Face analysis

occ face:background_job [-u|--user_id USER_ID] [-t|--timeout TIMEOUT] [-M|--max_image_area MAX_IMAGE_AREA]

This command will do all the work. It is responsible for searching the images, analyzing them and clustering faces found in them in groups of similar people.

Beware that this command can take a lot of CPU and memory! Before you put it to cron job, it is advised to try it out manually first, just to be sure you have all requirements and you have enough resources on your machine.

Command is designed to be run continuously, so you will want to schedule it with cron to be executed every once in a while, together with a specified timeout. It can be run every 15 minutes with timeout of -t 900 (so, it will stop itself automatically after 15 minutes and cron will start it again), or once a day with timeout of 2 hours, like -t 7200.

If USER_ID is supplied, it will just loop over files of a given user. Keep in mind that each user must enable the analysis individually, and otherwise this command will ignore the user.

If TIMEOUT is supplied it will stop after the indicated seconds, and continue in the next execution. Use this value in conjunction with the times of the scheduled task to distribute the system load during the day.

If MAX_IMAGE_AREA is supplied caps the maximum area (in pixels^2) of the image to be fed to neural network, effectively lowering needed memory. Use this if face detection crashes randomly.

Resetting information

occ face:reset [--all] [--model] [--image-errors] [--clustering] [-u|--user_id USER_ID]

This command can completely wipe out all images, faces and cluster of persons. It is ideal if you want to start from scratch for any reason.

You must specify if you wish to completely reset the database [--all] or just the current model [--model] and all images must be analyzed again, or or you can reset only the clustering of persons [--clustering] and only clustering needs to be done again, or reset only the images that had errors [--image-errors] to try to analyze them again.

If USER_ID is provided, it will just reset the information of a particular user.

Migrate models

occ face:migrate [-m|--model_id MODEL_ID] [-u|--user_id USER_ID]

This command allows to migrate the faces obtained in a model to a new one. Note that the persons name are not migrated, and the user must rename them again. Always is recommended to analyze from scratch any configured model, but you can save a lot of time migrating it.

You must specify which model you want to migrate using the MODEL_ID option.

If USER_ID is provided, just migrate the faces for the given user.

Statistics

occ face:stats [-u|--user_id USER_ID] [-j|--json]

This command return a summary of the number of images, faces and persons found.

If USER_ID is provided, just return the stats for the given user.

If use the --json argument, it prints the stats in a json format more suitable to parse with other tools.

Progress

occ face:progress

This command just return the progress of the analysis and an estimated time to complete.