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Temporal Scale Spaces

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Abstract

In this paper we discuss how to define a scale space suitable for temporal measurements. We argue that such a temporal scale space should possess the properties of: temporal causality, linearity, continuity, positivity, recursitivity as well as translational and scaling covariance. It is shown that these requirements imply a one parameter family of convolution kernels. Furthermore it is shown that these measurements can be realized in a time recursive way, with the current data as input and the temporal scale space as state, i.e. there is no need for storing earlier input. This family of measurement processes contains the diffusion equation on the half line (that represents the temporal scale) with the input signal as boundary condition on the temporal axis. The diffusion equation is unique among the measurement processes in the sense that it is preserves positivity (in the scale domain) and is locally generated. A numerical scheme is developed and relations to other approaches are discussed.

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Authors and Affiliations

  1. Computational Vision and Active Perception Laboratory (CVAP), Department of Numerical Analysis and Computing Science, KTH (Royal Institute of Technology), SE-100 44, Stockholm, Sweden

    Daniel Fagerström

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  1. Daniel Fagerström
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Correspondence to Daniel Fagerström.

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First online version published in June, 2005

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Fagerström, D. Temporal Scale Spaces. Int J Comput Vision 64, 97–106 (2005). https://doi.org/10.1007/s11263-005-1837-8

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  • DOI: https://doi.org/10.1007/s11263-005-1837-8

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