Are there algorithms for recognizing emotions in a photograph of a human face?

Question

Image processing

Are there algorithms for recognizing emotions in a photograph of a human face?

Maybe someone came across a solution to this problem?

Answer 1

There is a solution based on genetic algorithms.

Answer 2

hmm... interesting problem. I think it can be represented as follows:
face detection -> emotion detection,
the first task has already been completely solved - in the same OpenCV there is already a trained example based on Viola-Jones.
I think that emotions can be detected in the same way, using a multiclass classifier.
For example, to begin with, to be puzzled by the task of detecting a smile, then a sad expression (here it will be difficult - everything should be easier with a smile :)
Good luck!