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Digital elevation model combination using triangular image warping interpolation and maximum likelihood

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The main purpose of this letter was to construct a large-region Digital Elevation Model (DEM) from small-area DEMs. Image mosaicking and data fusion techniques are necessary in constructing a large-region DEM from small-area DEMs. The topographic distortion of the image must be corrected because of viewing angle and time differences among the acquired images. The orthorectification and image mosaicking are executed using a grid matrix of the longitude and latitude obtained from DEM extraction at 10 m intervals. The height at each grid location in the overlapping region is determined using a triangular image warping interpolation and a maximum likelihood procedure. The images used in the experiments are two pairs of images from the SPOT High Resolution Visible (HRV) sensor. The results show that a large-region DEM can be obtained from small-area DEMs.

Document Type: Research Article


Affiliations: 1: Dept. of Information and Telecommunication Far East University, 5 San Wangjang Gamgok Eumscong Chungbuk 369-851 Korea, Email: 2: Motorola Korea Technology Center Ltd Chungdam-dong, Kandnam-gu, Seoul, 135-766 Korea, Email: 3: Department of Electronic Engineering Sogang University C.P.O. Box 1142 Seoul 100-611 Korea, Email:

Publication date: September 1, 2003

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