Immich Selfie Timelapse Tool

This tool helps create selfie timelapses from your Immich instance.
It uses the powerful machine learning features of Immich to gather all the photographs where a particular individual appears, retrieves the bounding box metadata, and automatically crops and aligns the photos.

Features

• Automatically fetch images featuring a specified individual from your Immich instance.
• Extract bounding box metadata and crop/align photos using machine learning.
• Discard photos with low resolution (set by threshold).
• Discard photos where the subject is viewed from the side.
• Adds timestamp in the filename for easy chronological ordering.

Setup

1. Generate an API Key in Immich:

   • Log in to your Immich web UI.
   • Navigate to the API settings (or your profile settings) and generate an API key.
   • Copy the API key for use with the script.

2. Find the Person ID:

   • In the Immich web UI, view photos sorted by person.
   • When you click on a specific person, check the URL in your browser.
   • The person ID (usually a UUID) is part of the URL. Copy this ID for use in the script.

3. Install Dlib python library

   • Download the wheel for your python version here: https://github.com/z-mahmud22/Dlib_Windows_Python3.x
   • Install it with python -m pip install dlib-19.24.99-cp312-cp312-win_amd64.whl

4. Download the face detection CNN model

   • Download mmod_human_face_detector.dat from: https://github.com/justadudewhohacks/face-recognition.js-models/blob/master/models/mmod_human_face_detector.dat
   • Place the file in the same folder as the script, or update the predictor path in the script accordingly.

5. Download the Face Landmark Data:

   • Download the 68-point face landmark model from: https://github.com/italojs/facial-landmarks-recognition/blob/master/shape_predictor_68_face_landmarks.dat
   • Place the file in the same folder as the script, or update the predictor path in the script accordingly.

6. Install the required python modules from requirements.txt

   • Note that an old version of Numpy is required for compatibility with dlib.

Usage

Run the script from the command line with the required arguments. For example:

python process_faces.py \
  --api-key YOUR_API_KEY \
  --base-url http://your.immich.server:2283/api \
  --person-id YOUR_PERSON_ID \
  --output-folder output

Command-line Arguments

• --api-key: API key generated from Immich.
• --base-url: Base URL of your Immich API (e.g., http://192.168.1.123:2283/api).
• --person-id: The ID of the person (obtained from the Immich web UI).
• --output-folder: Directory where the aligned face images will be saved (default: output).
• --padding-percent: Padding added around the face as a percentage (default: 0.3).
• --resize-width and --resize-height: Dimensions for the output image (default: 512 x 512).
• --min-face-width and --min-face-height: Minimum acceptable face dimensions (default: 128 x 128).
• --pose-threshold: Threshold for acceptable head pose.
• --desired-left-eye: Desired left eye position as a fraction (x y) in the output image (default: 0.35 0.45).
• --max-workers: Number of parallel processes to use (default: 4).
• --face-detect-model-paths: Path to the CNN face detector model file (default: mmod_human_face_detector.dat).
• --landmark-model-path: Path to the face landmark predictor model file (default: shape_predictor_68_face_landmarks.dat).

Additional Notes

• Ensure that the shape_predictor_68_face_landmarks.dat file is accessible by the script. Update the path if necessary.
• The tool may require some manual sorting of the output images to achieve the best video effect. In particular, the face landmark detection is not super robust.
• Execution speed: on my i5 11400, it can process about 2 image per second.
• I find that a video framerate of 15 fps gives good results.
• Contributions and improvements are welcome.

License

This project is open source and available under the MIT License.