A block-based orthogonal locality preserving projection method for face super-resolution

Authors:
Shwu-Huey Yen;Che-Ming Wu;Hung-Zhi Wang
Affiliations:
Department of Computer Science and Information Engineering, Tamkang University, New Taipei City, Taiwan, Republic of China (ROC);Department of Computer Science and Information Engineering, Tamkang University, New Taipei City, Taiwan, Republic of China (ROC);Department of Computer Science and Information Engineering, Tamkang University, New Taipei City, Taiwan, Republic of China (ROC)
Venue:
ACIIDS'12 Proceedings of the 4th Asian conference on Intelligent Information and Database Systems - Volume Part II
Year:
2012

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Abstract

Due to cost consideration, the quality of images captured from surveillance systems usually is poor. To restore the super-resolution of face images, this paper proposes to use Orthogonal Locality Preserving Projections (OLPP) to preserve the local structure of the face manifold and General Regression Neural Network (GRNN) to bridge the low-resolution and high-resolution faces. In the system, a face is divided into four blocks (forehead, eyes, nose, and mouth). The super-resolution process is applied on each block then combines them into a complete face. Comparing to existing methods, the proposed method has shown an improved and promising result.