The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Geographic object-based image analysis (GEOBIA) is a useful method for image classification. This study aimed to find optimal parameters combination for extracting buildings using object-based image analysis. The images taken from two satellites Quickbird-2 and Gaofen (GF-1) were used to extract information of buildings in an urban area. The most important step in image segmentation is to determine...
The most commonly used water extraction methods, the Normalized Difference Vegetation Index (NDVI), the Normalized Difference Water Index (NDWI) and the Modified Normalized Difference Water Index (MNDWI), use spectral bands to differentiate between water and other features in images. Each method has its drawbacks: NDVI cannot effectively distinguish between vegetation and water; NDWI confuses building...
One of the fundamental problems in image search is to learn the ranking functions, i.e., similarity between the textual query and visual image. A number of research paradigms, ranging from feature-based vector model to image ranker learning, have been applied to measure query-image similarity. However, most of the existing similarity learning methods either depend on surrounding texts for ranking...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.