Add notes for facial recogniton models source (#8522)

Co-authored-by: LakesLab <lackeslab@gmail.com>

machine-learning/README.md

@@ -22,3 +22,19 @@ You can change the models or adjust options like score thresholds through the Lo
 To get started, you can simply run `locust --web-host 127.0.0.1` and open `localhost:8089` in a browser to access the UI. See the [Locust documentation](https://docs.locust.io/en/stable/index.html) for more info on running Locust. 
 
 Note that in Locust's jargon, concurrency is measured in `users`, and each user runs one task at a time. To achieve a particular per-endpoint concurrency, multiply that number by the number of endpoints to be queried. For example, if there are 3 endpoints and you want each of them to receive 8 requests at a time, you should set the number of users to 24.
+
+# Facial Recognition
+
+## Acknowledgements
+This project utilizes facial recognition models from the [InsightFace](https://github.com/deepinsight/insightface/tree/master/model_zoo) project. We appreciate the work put into developing these models, which have been beneficial to the machine learning part of this project.
+
+### Used Models
+* antelopev2
+* buffalo_l
+* buffalo_m
+* buffalo_s
+
+## License and Use Restrictions
+We have received permission to use the InsightFace facial recognition models in our project, as granted via email by Jia Guo (guojia@insightface.ai) on 18th March 2023. However, it's important to note that this permission does not extend to the redistribution or commercial use of their models by third parties. Users and developers interested in using these models should review the licensing terms provided in the InsightFace GitHub repository.
+
+For more information on the capabilities of the InsightFace models and to ensure compliance with their license, please refer to their [official repository](https://github.com/deepinsight/insightface). Adhering to the specified licensing terms is crucial for the respectful and lawful use of their work.