Kaggle Challenge - https://www.kaggle.com/c/challenges-in-representation-learning-facial-expression-recognition-challenge/data

Facial Emotion Recognition on FER2013 Dataset Using a Convolutional Neural Network.

80-10-10 ratio for training-validation-test sets.

Winner - 71.161% accuracy

This Model - 66.369% accuracy

These instructions will get this model up and running. Follow them to make use of the fertestcusstom.py file to recognize facial emotions using custom images. This model can also be used as facial emotion recognition part of projects with broader applications

Install these prerequisites before proceeding-

 pip3 install tensorflow
 pip3 install keras
 pip3 install numpy
 pip3 install sklearn
 pip3 install pandas
 pip3 install opencv-python

If you don't want to train the classifier from scratch, you can make the use of fertestcustom.py directly as the the repository already has fer.json (trained model) and fer.h5 (parameters) which can be used to predict emotion on any test image present in the folder. You can modify fertestcustom.py according to your requirements and use it to predict fatial emotion in any use case.

Clone this repository using-

git clone https://github.com/gitshanks/fer2013.git

Download and extract the dataset from Kaggle link above.

Run the preprocessing.py file, which would generate fadataX.npy and flabels.npy files for you.

Run the fertrain.py file, this would take sometime depending on your processor and gpu. Took around 1 hour for with an Intel Core i7-7700K 4.20GHz processor and an Nvidia GeForce GTX 1060 6GB gpu, with tensorflow running on gpu support. This would create modXtest.npy, modytest,npy, fer.json and fer.h5 file for you.

You can test the accuracy of trained classifier using modXtest.npy and modytest.npy by running fertest.py file. This would give youy the accuracy in % of the recently trained classifier.

You can get the confusion matrix for this model by running confmatrix.py file. This would evaluate the most confused expressions and generate a confusionmatrix.png file for your trained model, which would look something like this.

The layers in the Convolution Neural Network used in implementing this classifier can be summarized as follows. You can git a similar summary by decommenting the model.summar() function before executing fertrain.py file.