Biometrics is the use of technology to recognize individuals from specific physical traits. For this reason, most uses of biometrics are used in security. The goal of this project is to create an emotion recognition app that would be used solely for entertainment purposes rather than security by altering the background of an Android phone to an image of the user's choosing for the recognized emotion.
The project procedure involved getting clear images of the app user's face from the Android webcam and adjusted the image to make it easier for comparison with other images. Databases for specific emotions were used to compare the captured face image with other images in order to "train" the system. The use of principal component analysis and the nearest neighbor algorithm was used when directly comparing the captured image with the images of all the databases.