文章基本信息

标题：Spatial Database Updating Using Active Contours for Multispectral Images: Application with Landsat7
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作者：Sylvie Jodouin ; Layachi Bentabet ; Djemel Ziou 等
期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：2001
卷号：XXXIV-4/W5
页码：48-53
出版社：Copernicus Publications
摘要：This paper presents a fully automated system for area detection based on satellite images and topographic features from a database. The surfaces issued from the database are refined using active contours (also called snakes) according to updated information provided by the multi-spectral images. The snake is reformulated using finite elements, allowing for the processing of smaller structures thus low time processing. We propose a new external energy measure through a formula by combining statistical and radiometry features. Usually the snake model is controlled by various parameters that are difficult to set by a trial-and-error process. We propose an automatic setting of these parameters and an update of the snake topology. The proposed updates allow the snake to be deformed in order to provide accurate localization. Our approach is validated in a series of tests on LANDSAT7 images
关键词：Active contours; snakes; multi-spectral imagery; spatial data integration