|Table of Contents|

Subpixel Algorithm Based on Level Interpolation and Least Squares Fitting

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2008年05期
Page:
615-618
Research Field:
Publishing date:

Info

Title:
Subpixel Algorithm Based on Level Interpolation and Least Squares Fitting
Author(s):
LI ZheDING Zhen-liangYUAN Feng
School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,China
Keywords:
centroid algorithms interpolations least squares fitting subpixel precision
PACS:
TP391.41
DOI:
-
Abstract:
The causes for the errors of traditional centroid subpixel algorithms are theoretically analyzed and an improved centroid algorithm based on cubic convolution interpolation by pyramid algorithm and least squares fitting is presented.Several interpolations are used to subdivide the spot images and least squares surface fitting is employed to compute iteratively in each level.The image resolution is increased and the influence of system errors and random noise in image on the algorithm is reduced,and the spot center is located accurately.The simulation results show that the accuracy of the level interpolation fitting algorithm is better than centroid algorithm and surface fitting algorithm and has good practicability in aircraft measurement experiments.

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Last Update: 2012-12-19