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    ViewFusion: Correlating Structure and Activity Views for Execution Traces
    (The Eurographics Association, 2012) Trümper, Jonas; Telea, Alexandru; Döllner, Jürgen; Hamish Carr and Silvester Czanner
    Visualization of data on structure and related temporal activity supports the analysis of correlations between the two types of data. This is typically done by linked views. This has shortcomings with respect to efficient space usage and makes mapping the effect of user input into one view into the other view difficult. We propose here a novel, space-efficient technique that 'fuses' the two information spaces - structure and activity - in one view. We base our technique on the idea that user interaction should be simple, yet easy to understand and follow. We apply our technique, implemented in a prototype tool, for the understanding of software engineering datasets, namely static structure and execution traces of the Chromium web browser.
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    Computing Curve Skeletons from Medial Surfaces of 3D Shapes
    (The Eurographics Association, 2012) Telea, Alexandru; Jalba, Andrei C.; Hamish Carr and Silvester Czanner
    Skeletons are powerful shape descriptors with many applications in shape processing, reconstruction and matching. In this paper we show that in 3D, curve skeletons can be extracted from surface skeletons in the same manner as surface skeletons can be computed from 3D object representations. Thus, the curve skeleton is conceptually the result of a recursion applied twice to a given 3D shape. To compute them, we propose an explicit advection of the surface skeleton in the implicitly-computed gradient of its distance-transform field. Through this process, surface skeleton points collapse into the sought curve skeleton. As a side result, we show how to reconstruct accurate and smooth surface skeletons from point-cloud representations thereof. Finally, we compare our method to existing state-of-the-art approaches.