Scientific- Research Quarterly of Geographical Data (SEPEHR)

Scientific- Research Quarterly of Geographical Data (SEPEHR)

Examination and Evaluation of the Mathematical Models of "Rational Function" and "Modified DLT" for Geometric Correction of Satellite Image Couples

Document Type : Research Paper

Authors
Mohammad Javad Valadan Zowj
Asghar Milan Lak
Mahdi Gholam Ali Majd Abadi
Faculty of Surveying, K.N. Toosi University of Technology
Abstract
Dynamism of satellite images with linear arrangement has made it possible to use highly complex algorithms requiring information from the satellite's orbit to carry out geometric correction of these images with high precision. On the other hand, in new satellite imagery, sellers of these images are not interested in sending this information. For this reason, in order to perform the geometric correction of these images, we need new mathematical models to perform the geometric correction and meet the required precision without any need for satellite information. One of these models is the Rational Function Model, which is used for this purpose. The other is the modified DLT. In this paper, these models have been investigated for geometric correction of satellite images, for which purpose programs have been written in Visual C environment.
To test these models, the results of these models’ implication on IRS, IKONOS and SPOT satellite images were surveyed. The results of this study showed that these models were able to perform the geometric correction of these images. Although they are less accurate than the models that use orbit parameters, the value of these models lies in their independence from satellite orbit parameters, their vast capacity of processing and also in the simplicity of these models.
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Scientific- Research Quarterly of Geographical Data (SEPEHR)
Volume 14, Issue 55
Autumn 2005
Pages 9-12