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Suche nach „[Hofmann] [Peter]“ hat 49 Publikationen gefunden
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    Zeitschriftenartikel

    U. Benz, Peter Hofmann, G. Willhauck, I. Lingenfelder, M. Heynen

    Multi-resolution, object-oriented fuzzy analysis of remote sensing data for GIS-ready information

    ISPRS Journal of Photogrammetry & Remote Sensing, vol. 58, no. 3-4, pp. 239-258

    2004

    DOI: 10.1016/j.isprsjprs.2003.10.002

    Abstract anzeigen

    Remote sensing from airborne and spaceborne platforms provides valuable data for mapping, environmental monitoring, disaster management and civil and military intelligence. However, to explore the full value of these data, the appropriate information has to be extracted and presented in standard format to import it into geo-information systems and thus allow efficient decision processes. The object-oriented approach can contribute to powerful automatic and semi-automatic analysis for most remote sensing applications. Synergetic use to pixel-based or statistical signal processing methods explores the rich information contents. Here, we explain principal strategies of object-oriented analysis, discuss how the combination with fuzzy methods allows implementing expert knowledge and describe a representative example for the proposed workflow from remote sensing imagery to GIS. The strategies are demonstrated using the first object-oriented image analysis software on the market, eCognition, which provides an appropriate link between remote sensing imagery and GIS.

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    Beitrag (Sammelband oder Tagungsband)

    Peter Hofmann

    Detecting urban features from IKONOS data using an object-oriented approach

    Proceedings of the 1st Annual Conference of the Remote Sensing and Photogrammetry Society (RSPSoc) [London, England]

    2001

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    Buch (Monographie)

    M. Baatz, M. Heynen, Peter Hofmann, I. Lingenfelder, M. Mimier, A. Schape, M. Weber, G. Willhauck

    eCognition User Guide 2.0: Object oriented image analysis

    2001

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    Beitrag (Sammelband oder Tagungsband)

    Peter Hofmann

    Detecting informal settlements from IKONOS image data using methods of object oriented image analysis-an example from Cape Town (South Africa)

    Remote Sensing of Urban Areas/Fernerkundung in urbanen Räumen, Regensburg, vol. 35

    2001

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    Zeitschriftenartikel

    Peter Hofmann

    Detecting buildings and roads from IKONOS data using additional elevation information

    GeoBIT/GIS, vol. 6, no. 01, pp. 28-33

    2001

    Abstract anzeigen

    Using high resolution imagery such as IKONOS data should make it possible to detect man-made-features such as buildings and roads more easily than with conventional satellite image data. However, due to the higher spatial resolution of IKONOS data, an automatic or semiautomatic detection of such features based only on their spectral characteristics can become difficult, especially in heterogeneous areas such as dense urban areas (see Bauer, T. & Steinnocher, K. in this issue). A typical problem in urban remote sensing is the handling of shadows. Using a DEM and additional semantic information can help to detect such cases and to manage them adequately. Furthermore, when using an additional DEM, significant elevation information of questionable objects can be used to identify their shape. As eCognition is able to use an arbitrary number of channels for the image segmentation and classification, the DEM was used for the initial segmentation and for the subsequent object classification. Thereby, the influence of the DEM on the object generation can be controlled by adjusting the channels' weights. Based upon the underlying concepts of eCognition to generate and classify image objects, different strategies have been developed.

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    Zeitschriftenartikel

    Peter Hofmann, W. Reinhardt

    The extraction of GIS features from high resolution imagery using advanced methods based on additional contextual information-first experiences

    International Archives of Photogrammetry and Remote Sensing, vol. 33, no. B4/1; PART 4, pp. 376-383

    2000

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    Hochschulschrift

    Peter Hofmann

    Die Anwendung fernerkundlicher Daten und Methoden im Geomarketing, untersucht am Beispiel einer KFA-1000-Aufnahme von München

    1997

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    Zeitschriftenartikel

    Peter Hofmann

    Multinationale Unternehmen in Schottland

    Wirtschaftsraum, Ressourcen, Umwelt (WRU), vol. 8, pp. 54-58

    1996