Visualizing the temporal development of thermo-radiative features on ground-based thermographs

Kathrin Häb, Nils H. Feige, Lars S. Huettenberger, Ariane Middel, Hans Hagen

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

In urban microclimate research, ground-based thermography is used to gain insight into the spatial distribution of surface temperatures of various materials. Taking snapshots over a certain time span helps experts to observe the temporal thermo-radiative behavior of the monitored surface elements and therefore supports decisions on possible optimizations, e.g., improving the thermal comfort in a neighborhood. Appropriate visualization techniques facilitate decision-making and are thus crucial in the optimization process. In this study, we present a tool that eases the extraction of thermo-radiative features from multi-temporal thermographs taken from a monitored scene. Assisted by our tool, users can identify, choose, and register thermo-radiative features for each time step according to their individual research needs. The features’ temporal development is then visualized using a directed graph that encodes topological events as well as each feature’s size and summarizing statistics. To enhance this summary, a comprehensive animated sequence emphasizes the spatiotemporal behavior of the most significant thermo-radiative features. Salient developments are visually embedded and highlighted in the original infrared images, which are blended in an animation from time step to time step. Since we enable the user to interact with the data in a flexible way, noisy and low resolution image data sets can also be processed.

Original languageEnglish (US)
Pages (from-to)3781-3793
Number of pages13
JournalEnvironmental Earth Sciences
Volume72
Issue number10
DOIs
StatePublished - Jan 1 2014

Keywords

  • Feature representation
  • Size and shape
  • [I.4 Image Processing and Computer Vision] Time-varying imagery
  • [J.2 Physical Sciences and Engineering] Earth and atmospheric sciences

ASJC Scopus subject areas

  • Global and Planetary Change
  • Environmental Chemistry
  • Water Science and Technology
  • Soil Science
  • Pollution
  • Geology
  • Earth-Surface Processes

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