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Reseach Article

A Priori Laplacian with Hamming Distance: Advanced Dimension Reduction Technique

by Gaurav Gupta
International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 77 - Number 9
Year of Publication: 2013
Authors: Gaurav Gupta
10.5120/13426-1112

Gaurav Gupta . A Priori Laplacian with Hamming Distance: Advanced Dimension Reduction Technique. International Journal of Computer Applications. 77, 9 ( September 2013), 42-48. DOI=10.5120/13426-1112

@article{ 10.5120/13426-1112,
author = { Gaurav Gupta },
title = { A Priori Laplacian with Hamming Distance: Advanced Dimension Reduction Technique },
journal = { International Journal of Computer Applications },
issue_date = { September 2013 },
volume = { 77 },
number = { 9 },
month = { September },
year = { 2013 },
issn = { 0975-8887 },
pages = { 42-48 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume77/number9/13426-1112/ },
doi = { 10.5120/13426-1112 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T21:49:51.717423+05:30
%A Gaurav Gupta
%T A Priori Laplacian with Hamming Distance: Advanced Dimension Reduction Technique
%J International Journal of Computer Applications
%@ 0975-8887
%V 77
%N 9
%P 42-48
%D 2013
%I Foundation of Computer Science (FCS), NY, USA
Abstract

Images containing faces are essential to intelligent vision-based human computer interaction, and research efforts in face processing include face recognition, face tracking, pose estimation, and expression recognition. The rapidly expanding research in face processing is based on the premise that information about a user's identity, state, and intent can be extracted from images and that computers can then react accordingly, e. g. , by knowing person's identity, person may be authenticated to utilize a particular service or not. A first step of any face processing system is registering the locations in images where faces are present. However, face registration for whole database is a challenging task because of variability in scale, location, orientation (up-right, rotated), and pose (frontal, profile). Facial expression, occlusion, and lighting conditions also change the overall appearance of face. The Image registration algorithm will register all these images present in the database. The face recognition algorithm which is insensitive to large variation in lighting direction and facial expression is to be implemented. Taking a pattern classification approach, each pixel in an image can be considered as a coordinate in a high-dimensional space. The advantage of this is that the images of a particular face, under varying illumination but fixed pose, lie in a 3D linear subspace of the high dimensional image space—if the face is a Lambertian surface. However, since faces are not truly Lambertian surfaces and do indeed produce self-shadowing images will deviate from this linear subspace. Rather than explicitly modeling this deviation, project the image into a subspace in such a manner which discounts those regions of the face with large deviation. This is achieved by using dimension reduction techniques like Principal component analysis (PCA), Linear Discriminant analysis (LDA), Laplacian faces and other modified approaches like A Priori Laplacian and A Priori Laplacian with Hamming Distance.

References
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Index Terms

Computer Science
Information Sciences

Keywords

Hamming Distance Principal component analysis Linear discriminant analysis Linear projective projection Eigen value Laplacian faces A Priori Laplacian