Efficiency and Capability of using Artificial Intelligent Algorithms for Ortho-image and Digital Elevation Model Generation

Document Type : Persian Original Article

Authors

1 University of Tafresh, Tafresh, Iran

2 Associate professor of the Geomatics College of the National Cartographic Center

Abstract

Nowadays the artificial intelligent algorithms has considered in GIS and remote sensing. Genetic
algorithm and artificial neural network are two intelligent methods that are used for optimizing of image
processing programs such as edge extraction and etc. these algorithms are very useful for solving of complex
program. In this paper, the ability and application of genetic algorithm and artificial neural network in
geospatial production process like geometric modeling of satellite images for ortho photo generation and
height interpolation in raster Digital Terrain Model production process is discussed. In first, the geometric
potential of Ikonos-2 and Worldview-2 with rational functions, 2D & 3D polynomials were tested. Also
comprehensive experiments have been carried out to evaluate the viability of the genetic algorithm for
optimization of rational function, 2D & 3D polynomials. Considering the quality of Ground Control Points,
the accuracy (RMSE) with genetic algorithm and 3D polynomials method for Ikonos-2 Geo image was 0.508
pixel sizes and the accuracy (RMSE) with GA algorithm and rational function method for Worldview-2
image was 0.930 pixel sizes. For more another optimization artificial intelligent methods, neural networks
were used. With the use of perception network in Worldview-2 image, a result of 0.84 pixel sizes with 4
neurons in middle layer was gained. The final conclusion was that with artificial intelligent algorithms it is
possible to optimize the existing models and have better results than usual ones. Finally the artificial
intelligence methods, like genetic algorithms as well as neural networks, were examined on sample data for
optimizing interpolation and for generating Digital Terrain Models. The results then were compared with
existing conventional methods and it appeared that these methods have a high capacity in heights
interpolation and that using these networks for interpolating and optimizing the weighting methods based on
inverse distance leads to a high accurate estimation of heights.

Keywords