Proceedings of the Symposium on Global and Environmental Monitoring: Proceedings of the Symposium on Global and Environmental Monitoring

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Persistent identifier:: 856665355

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts ; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856665355

Language:: English

Document type:: Multivolume work

Volume

Persistent identifier:: 856669164

Title:: Proceedings of the Symposium on Global and Environmental Monitoring

Sub title:: techniques and impacts; September 17 - 21, 1990, Victoria Conference Centre, Victoria, British Columbia, Canada

Scope:: XIV, 912 Seiten

Year of publication:: 1990

Place of publication:: Victoria, BC

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 856669164

Illustration:: Illustrationen, Diagramme, Karten

Signature of the source:: ZS 312(28,7,1)

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: International Society for Photogrammetry and Remote Sensing, Commission of Photographic and Remote Sensing Data

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [WA-1 KNOWLEDGE-BASED TECHNIQUES/ SYSTEMS FOR DATA FUSION]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: A HIERARCHICAL TERRAIN INTERPRETATION SYSTEM USING 'PIXEL SWAPPING' METHOD. Joji Iisaka, Wendy Russell

Document type:: Multivolume work

Structure type:: Chapter

168 A HIERARCHICAL TERRAIN INTERPRETATION SYSTEM USING ’PIXEL SWAPPING’ METHOD Joji Iisaka Canada Centre for Remote Sensing 1547 Merivale Rd. Nepean, Ontario, Canada Wendy Russell Intera Technologies Ltd. Ottawa, Ontario, Canada ABSTRACT Digital image processing is very popular for extracting terrain information from remotely sensed data. At present, most image analysis methods are still limited to the processing of images on a pixel-by-pixel basis while the human interpretation of images is mostly based on structural spatial information with a high level of context and semantics. This paper briefly describes the concept of the microcomputer-based terrain understanding system which employs hierarchical image interpretation steps using the ’pixel swapping’ method. The ’pixel swapping’ method provides a unified image analysis method for spectral and spatial features in images. Image interpretation steps are divided hierarchically into a bottom-up and top-down approach. Each involves a few steps. With the bottom-up approach, an image is analyzed first by traditional low-level processing methods using numerical pixel values. The results of the numeric interpretation are interpreted in a more symbolic way by applying the ’pixel swapping’ method of spatial interpretation. The symbolized images are interpreted based on the type of the attributes, constraints of the attribute values, and the spatial relations between various objects in images. On the other hand, the targeted object in an image is divided into its constituent components and their attributes under the top-down approach. The system gives the control to the lower levels to evaluate required attribute values, if they have not been evaluated before, and compares the estimated attribute values with existing knowledge of the attributes in a data base. The system employs an LSI-based image processor (IP9506) to accelerate low-level image processing and to facilitate the implementation of pixel swapping.

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fullscreen: Proceedings of the Symposium on Global and Environmental Monitoring (Part 1)

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