Dihedral Group D4—A New Feature Extraction Algorithm

Feature extraction of a single dihedral reflector from SAR data

As one of the key steps in the feature extraction of targets consisting of both trihedral and dihedral corner re ectors via synthetic aperture radar, this paper studies the problem of estimating the parameters of a single dihedral corner re ector. The data model of the problem and the Cram er-Rao bounds (CRBs) for the parameter estimates of the data model are presented. Two algorithms, the FFTB...

Facial Expression Recognition Using New Feature Extraction Algorithm

This paper proposes a method for facial expression recognition. Facial feature vectors are generated from keypoint descriptors using Speeded-Up Robust Features. Each facial feature vector is then normalized and next the probability density function descriptor is generated. The distance between two probability density function descriptors is calculated using Kullback Leibler divergence. Mathemat...

A new nonlinear feature extraction algorithm for speaker verification

In this paper we propose a new feature extraction algorithm based on nonlinear prediction: the Neural Predictive Coding model which is an extension of the classical LPC one. This model is applied to speaker verification by the Arithmetic-Harmonic Sphericity (AHS) method. Two different initialization methods are proposed for the coding method based on the Neural Predictive Coding (NPC): classica...

Chord Context Algorithm for Shape Feature Extraction

Facial Feature Extraction Using Genetic Algorithm

An automatic facial feature extraction method is presented in this paper. The method is based on the edge density distribution of the image. In the preprocessing stage a face is approximated to an ellipse, and genetic algorithm is applied to search for the best ellipse region match. In the feature extraction stage, genetic algorithm is applied to extract the facial features, such as the eyes, n...