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http://hdl.handle.net/10553/74289
Title: | Automatic satellite image georeferencing using a contour-matching approach | Authors: | Eugenio, Francisco Marqués, Ferran |
UNESCO Clasification: | 332401 Satélites artificiales 3301 Ingeniería y tecnología aeronáuticas |
Keywords: | Image Georeferencing Multitemporal and Multisensor Images Remote Sensing Image Processing |
Issue Date: | 2003 | Journal: | IEEE Transactions on Geoscience and Remote Sensing | Abstract: | Multitemporal and multisatellite studies or comparisons between satellite data and local ground measurements require nowadays precise and automatic geometric correction of satellite images. This paper presents a fully automatic geometric correction system capable of georeferencing satellite images with high accuracy. An orbital prediction model, which provides initial earth locations, is combined with the proposed automatic contour-matching technique. This combination allows correcting the low-frequency error component, mainly due to timing and orbital model errors, as well as the high-frequency error component, due to variations in the spacecraft's attitude. The approach aims at exploiting the maximum reliable information in the image to guide the matching algorithm. The contour-matching process has three main steps: 1) estimation of the gradient energy map (edges) and detection of the cloudless (reliable) areas; 2) initialization of the contours positions; 3) estimation of the transformation parameters (affine model) using a contour optimization approach. Three different robust and automatic algorithms are proposed for optimization, and their main features are discussed. Finally, the performance of the three proposed algorithms is assessed using a new error estimation technique applied to Advanced Very High Resolution Radiometer (AVHRR), Sea-viewing Wide Field ofview Sensor (SeaWiFS), and multisensor AVHRR-SeaWiFS imagery. | URI: | http://hdl.handle.net/10553/74289 | ISSN: | 0196-2892 | DOI: | 10.1109/TGRS.2003.817226 | Source: | IEEE Transactions on Geoscience and Remote Sensing [ISSN 0196-2892], v. 41 (12), p. 2869-2880, (Diciembre 2003) |
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