Aerial Images Rectification Using Non-parametric Approach

Lee, Hung Liew and Beng, Yong Lee and Yin, Chai Wang and Wai, Shiang Cheah (2013) Aerial Images Rectification Using Non-parametric Approach. Journal of Convergence, 4 (2).

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Abstract

Geometric distortions caused by different sources usually are accumulated and not present singly in a remotely sensed image. In addition, the effects of geometric distortions are found unequally in the entire image. Hence, aerial images should be rectified before proceed with subsequent images analysis. Control points and geometric transformation are the essential components in non-parametric approach. Barrel and perspective distortions are usually found in aerial images. This paper studies the deformation rate contributed by control points at different regions in an image before rectification according to different distribution patterns. Besides, this paper also discusses the appropriate geometric transformation through the concern of the expected distortions. Experiments are conducted using grid images and aerial images to investigate the effect of distributions of control points and the efficiency of global and local geometric transformations for aerial images rectification. It demonstrated that control points at different image regions have different deformation rates, control points distributed at image centre are less distorted and local transformation performs better in rectifying images with complex distortions.

Item Type: Article
Uncontrolled Keywords: aerial image rectification, geometric distortions, non-parametric approach, control points distribution, geometric transformations, Universiti Malaysia Sarawak, UNIMAS, 2013, IPTA, education, sarawak, malaysia, kuching, samarahan, universiti, university
Subjects: Q Science > QA Mathematics
T Technology > T Technology (General)
Divisions: Academic Faculties, Institutes and Centres > Faculty of Computer Science and Information Technology
Depositing User: Karen Kornalius
Date Deposited: 23 Oct 2014 07:54
Last Modified: 23 Mar 2015 06:28
URI: http://ir.unimas.my/id/eprint/5187

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