Interconverting Models of Gray Matrix and Geographic Coordinates Based on Space Analytic Geometry

Ni Zhan, Liang Lin, Ling Lou

College of Science, Guilin University of Technology, Guilin, China.

DOI: 10.4236/am.2013.41009                

Abstract

With the progress and development of science, the synchronous satellite as the high-tech product is taken something more and more seriously by all countries. Converting gray value matrix into geographic coordinates becomes more and more important. This paper establishes the models for interconverting row and column of gray value matrix which detected by the infrared detectors on synchronous satellites and geographic coordinates based on the related theorems and properties of space analytic geometry. We draw satellite cloud image with the data of gray matrix in MATLAB, convert coastline’s latitude and longitude coordinates into row and column coordinates of a gray matrix according via these models when the sub-satellite point’s row and column coordinates and geographic coordinates are given, then add coast-lines to the original satellite cloud image with the transformation data. We find that coast-lines completely match with the bump characteristics of satellite cloud image, and that verify the correctness of the models.

Keywords

Space Analytic Geometry; Satellite Cloud Image; Geographic Coordinates; Gray Value Matrix; Coastline

Conflicts of Interest

The authors declare no conflicts of interest.

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