A two-dimensional production system for grouping persistent scatterers in urban high-resolution SAR scenes

Schack, Lukas; Schunert, Alexander; Soergel, Uwe

doi:10.1109/pprs.2012.6398311

Cited by 2 publications

(3 citation statements)

References 9 publications

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“…In [2], one-dimensional linear structures were grouped from given PS point clouds in an iterative manner. Later, this approach was extended to two dimensions using a straightforward production system [3]. This method worked well on some façades, but failed on more complex or overlapping patterns.…”

Section: Introductionmentioning

confidence: 99%

Exploiting Regular Patterns to Group Persistent Scatterers in Urban Areas

Schack

Soergel

2014

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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Urban areas are often characterized by geometrically simple and repetitive patterns, in particular, in cases where settlements have been built-up from scratch in a well-planned manner, e.g., according to architectonic, economic, or sociopolitic constraints. This leads to preferred rectangular and regular alignment of objects like windows or balconies at façades for the majority of buildings in modern cities. In this paper, we show how this regularity can be exploited for the challenging task of synthetic aperture radar (SAR) scene description and demonstrate the applicability in case studies. We present a virtually parameter-free method to segment a persistent scatterer point cloud and fit optimal lattices to describe separate façades. Formulating the PS as nodes in a graph allows us to use spectral graph theory to distinguish lattices even when they are overlapping or disturbed due to layover. As a result, we obtain an object-based representation of the SAR data, which allows for many new applications in the field of building monitoring and change detection in urban areas.

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Section: Introductionmentioning

confidence: 99%

Exploiting Regular Patterns to Group Persistent Scatterers in Urban Areas

Schack

Soergel

2014

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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“…tion of recognizing regular structures in an disorderly surrounding (Gestalt Theory). This theory defines rules which are used in a production system to aggregate points to rows which are then grouped to lattices (Schack et al, 2012b). We also exploit knowledge about the SAR imaging geometry.…”

Section: Introductionmentioning

confidence: 99%

“…Setting the threshold depends on the resolution of the SAR stack and the typical spacing of windows at a facade. Figure 8 shows an example of PS aggregated to a lattice by an production system as described in (Schack et al, 2012b). The green circles mark lattice positions in which neighborhood no valid PS could be found.…”

Section: Introductionmentioning

confidence: 99%

Using Lattice Topology Information to Investigate Persistent Scatterers at Facades in Urban Areas

Schack

Soergel

2013

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:Modern spaceborne SAR sensors like TerraSAR-X offer ground resolution of up to one meter in range and azimuth direction. Buildings, roads, bridges, and other man-made structures appear in such data often as regular patterns of strong and temporally stable points (Persistent Scatterer, PS). As one step in the process of unveiling what object structure actually causes the PS (i.e., physical nature) we compare those regular structures in SAR data to their correspondences in optical imagery. We use lattices as a common data representation for visible facades. By exploiting the topology information given by the lattices we can complete gaps in the structures which is one step towards the understanding of the complex scattering characteristics of distinct facade objects.

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A two-dimensional production system for grouping persistent scatterers in urban high-resolution SAR scenes

Cited by 2 publications

References 9 publications

Exploiting Regular Patterns to Group Persistent Scatterers in Urban Areas

Exploiting Regular Patterns to Group Persistent Scatterers in Urban Areas

Using Lattice Topology Information to Investigate Persistent Scatterers at Facades in Urban Areas

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