Cristina

Task

The goal of this work is to infer the personality traits of the PsychoFlickr dataset, fine-tuning the ImageNet CNN pre-trained model.

First Idea

The first idea was to adapt the prototxt containing the structure of the network so that it was able to take as input the images of the psycho Flickr datasets as data and the traits scores, both self and attributed as target, and fine-tune the Imagenet model of classifying 1000 classes of objects into our task of predicting the personality trait given an image.

The initial goal was indeed to surgery the prototxt changing the last layer so that the net has to learn it for the new task and changing the classification layer to a regression layer. We divide the dataset into 75% for the training set and the remaining 25% for the testing set. Some observation: we can’t build the files containing the list of images of training and testing together with all the labels for the train.

To work with the regression we build a txt file containing the path of the images and a hdf5 file for the 10 labels of the traits as they are oat number and not integer.

When we launched the first trait we noticed that all the network layers, both weights and data were set to zeros. To overcome this problem we decrease the learning rate and build the training files using random permutation of the images.

Then we test the fine-tuned model building a deploy.prototxt file that takes as input images and predict the traits of them. Testing the net we noticed that the net was not able to learn much. Maybe the task is to hard. We pretend to generalize a personality trait form 45000 images a predict a float number given a new image.