Face data-set is one the popular database, mostly used in validating non parametric as well as parametric models for computer vision applications. See more on Face recognition algorithms via the following Links:

1) https://www.gemalto.com/govt/biometrics/facial-recognition

2 ) https://towardsdatascience.com/an-intro-to-deep-learning-for-face-recognition-aa8dfbbc51fb

3 ) https://www.analyticsinsight.net/best-facial-recognition-software/

http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.360.4745&rep=rep1&type=pdf

Article 2D and 3D Face Recognition: A Survey

Article Face recognition using IPCA-ICA algorithm

https://www.cl.cam.ac.uk/teaching/2006/CompVision/SinhaFaceRecogProcIEEE.pdf

Article New LDA-based face recognition system which can solve the sm...

https://www.researchgate.net/post/What_is_the_popular_face_recognition_algorithm

A classic face detection method was proposed by Viola and Jones, it is basically a boosted cascade simple detectors. The use of integral images improves speed. The point is, such detector works best for the faces in frontal view, there were examples of the method being trained to side view. Your drone would have an aerial view, from above, wouldn't it?

Dear Muhammad Ali ,

Thanks for your answer. I'll follow those links to enhance my knowledge.

Dear Cristian Ramos-Vera ,

Thanks for your answer. I will follow your suggestions.