EmotionDetection

This is a python implementation for extracting arousal and valence values from images, as presented in the work: Building Emotional Machines: Recognizing Image Emotions through Deep Neural Networks by Hye-Rin Kim, Yeong-Seok Kim, Seon Joo Kim, In-Kwon Lee.

Pre-requisites

1. Make sure openCV is installed on both python and C++. Here is a tutorial to installing OpenCV on C++.
2. Tensorflow
3. scikit-learn

Instructions

Training

1. To avoid loading of model weights again and again, we first pre-compute certain features for all images, that will be used in making the feature vector of the image.

   • GIST Feature Extraction:

     • Run the code segment:

      	cd GIST 
      	make IMAGEPATH=<path_to_directory_containing_all_images>
      	make clean
     

     • This will create a file in the main folder named gists.txt, that contains the GIST descriptor of each image, one per line, in the format: <FILENAME>:<GIST_Descriptor>

   • VGG Object Feature Extraction:

     • For the following command, imageFile = a file containing names of images and their A/V values separated by a comma, and imagesDir = the folder containing all training images. Run the code segment:

        	cd VGG
        	python vgg16.py <imageFile> <imagesDir> <VGG_weights>
       

     • This will create a pickle in the main folder named vgg.pickle, that holds a python dictionary with names of images being mapped to their VGG object features.

     • More information about this VGG Descriptor can be found here.

   • Semantic Features Extraction:

     • Run the file test.py in the semantic_features folder, providing 4 python arguments, namely: test_img_file, test_img_directory, weights_encoder and weights_decoder.

2. Now, using these extracted features, and more (LBP features), we will be constructing a feature vector for each training image.

3. Set the training parameters in the file params.json, as required.

4. Run the training file:

	python train.py <imageFile> <imagesDir>

5. This will store the model in a modelData named directory, in the parent directory of the current folder. The name of folder in which contains a timestamp that will be used to recognise the stored model during the prediction.

Prediction

1. Again, go through the entire process of feature exrraction for the images for which the prediction needs to be made.

2. Set the prediction parameters in the file test_params.json, as required.

3. Run the prediction code:

	python predict.py <testImageFile> <testImgDir> <timestamp>

where testImageFile=file containing names of all images to be predicted for, testImgDir=directory containing all images to predicted for, timestamp=the timestamp of the model to be used for prediction.