Human observers perceive man-made objects in images from the visualspectrum domain as well as in IR or SAR imagery. Mechanisms likeperceptual grouping are crucial to this capability. In this papertwo examples for grouping in different image sources are discussed.The first example is activity estimation in urban areas from thermalIR images. The grouping of vehicles into rows is performed alongthe margins of the roads. The other example is related to the detectionof industrial buildings from InSAR data. Such buildings often showsalient regular patterns of strong scatterers on their roofs. A previoussegmentation which uses the intensity, height and coherence informationextracts building cues. Strong scatterers are filtered by a spotdetector and localized by a cluster formation. These scatterers aregrouped in rows by a process that uses the contours of the buildingcues as context.     «

Human observers perceive man-made objects in images from the visualspectrum domain as well as in IR or SAR imagery. Mechanisms likeperceptual grouping are crucial to this capability. In this papertwo examples for grouping in different image sources are discussed.The first example is activity estimation in urban areas from thermalIR images. The grouping of vehicles into rows is performed alongthe margins of the roads. The other example is related to the detectionof industrial buildings from InSAR...     »