Automatic grouping of regular structures

Automatic grouping of regular structures.

To cope with the continuously incoming stream of input, the visual system has to group information across space and time. Usually, spatial and temporal grouping are investigated separately. However, recent findings revealed that these two grouping mechanisms strongly interact and should therefore be studied together rather than in isolation. Here, we show that spatio-temporal grouping is very s...

Perceptual Grouping of Regular Structures for Automatic Detection of Man-Made Objects Examples from IR and SAR

Human observers perceive man-made objects in images from the visual spectrum domain as well as in IR or SAR imagery. Mechanisms like perceptual grouping are crucial to this capability. In this paper two examples for grouping in different image sources are discussed. The first example is activity estimation in urban areas from thermal IR images. The grouping of vehicles into rows is performed al...

On S-Regular Prefix-Rewriting Systems and Automatic Structures

Underlying the notion of an automatic structure is that of a synchronously regular (s-regular for short) set of pairs of strings. Accordingly we consider s-regular preex-rewriting systems showing that even for fairly restricted systems of this form connu-ence is undecidable in general. Then a close correspondence is established between the existence of an automatic structure that yields a preex...

Trajectory Grouping Structures

The collective motion of a set of moving entities like people, birds, or other animals, is characterized by groups arising, merging, splitting, and ending. Given the trajectories of these entities, we define and model a structure that captures all of such changes using the Reeb graph, a concept from topology. The trajectory grouping structure has three natural parameters that allow more global ...

Diagnosis of Regular Structures