Information-preserving surface restoration and feature extraction for digital elevation models

Uwe Weidner

doi:10.1117/12.182917

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17 August 1994 Information-preserving surface restoration and feature extraction for digital elevation models

Uwe Weidner

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Proceedings Volume 2357, ISPRS Commission III Symposium: Spatial Information from Digital Photogrammetry and Computer Vision; (1994) https://doi.org/10.1117/12.182917
Event: Spatial Information from Digital Photogrammetry and Computer Vision: ISPRS Commission III Symposium, 1994, Munich, Germany

Abstract

Preprocessing such as filtering data in order to remove or at least reduce noise is a crucial step because information which is lost during this filtering cannot be recovered in subsequent steps. It is a well-known fact, that linear filtering does not only reduce noise, but may also lead to a loss of information due to the global smoothing, regardless of structures in the data. In order to overcome these drawbacks, we propose using an algorithm for parameter free information- preserving surface restoration. As we do not want to evaluate the results of the filtering only qualitatively by visual inspection, we examine the influence of pre-processing on feature extraction for digital elevation models and discuss quantities for the evaluation of these influences.

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Uwe Weidner "Information-preserving surface restoration and feature extraction for digital elevation models", Proc. SPIE 2357, ISPRS Commission III Symposium: Spatial Information from Digital Photogrammetry and Computer Vision, (17 August 1994); https://doi.org/10.1117/12.182917

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KEYWORDS

Linear filtering

Feature extraction

Image filtering

Picosecond phenomena

Interference (communication)

Binary data

Digital filtering

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