This document summarizes a research paper on face recognition using image processing techniques. It begins with an introduction to biometrics and face detection methods. It then describes principal component analysis (PCA) and the "eigenface" approach, in which faces are represented as combinations of eigenvectors derived from training images. The document also discusses using the Radon transform to capture directional features, and applying the wavelet transform to the Radon space for multi-resolution features. It provides equations for these transforms. The paper was implemented and tested on databases of faces to evaluate recognition accuracy of different methods including PCA, Radon transform, wavelet transform, and their combination via Radon-wavelet transform.