Image-Based Aspect Ratio Selection

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2019
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Wang, Yunhai
Wang, Zeyu
Fu, Chi-Wing
Schmauder, Hansjörg
Weiskopf, Daniel
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IEEE Transactions on Visualization and Computer Graphics. 2019, 25(1), pp. 840-849. ISSN 1077-2626. eISSN 1941-0506. Available under: doi: 10.1109/TVCG.2018.2865266
Zusammenfassung

Selecting a good aspect ratio is crucial for effective 2D diagrams. There are several aspect ratio selection methods for function plots and line charts, but only few can handle general, discrete diagrams such as 2D scatter plots. However, these methods either lack a perceptual foundation or heavily rely on intermediate isoline representations, which depend on choosing the right isovalues and are time-consuming to compute. This paper introduces a general image-based approach for selecting aspect ratios for a wide variety of 2D diagrams, ranging from scatter plots and density function plots to line charts. Our approach is derived from Federer's co-area formula and a line integral representation that enable us to directly construct image-based versions of existing selection methods using density fields. In contrast to previous methods, our approach bypasses isoline computation, so it is faster to compute, while following the perceptual foundation to select aspect ratios. Furthermore, this approach is complemented by an anisotropic kernel density estimation to construct density fields, allowing us to more faithfully characterize data patterns, such as the subgroups in scatterplots or dense regions in time series. We demonstrate the effectiveness of our approach by quantitatively comparing to previous methods and revisiting a prior user study. Finally, we present extensions for ROI banking, multi-scale banking, and the application to image data.

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ISO 690WANG, Yunhai, Zeyu WANG, Chi-Wing FU, Hansjörg SCHMAUDER, Oliver DEUSSEN, Daniel WEISKOPF, 2019. Image-Based Aspect Ratio Selection. In: IEEE Transactions on Visualization and Computer Graphics. 2019, 25(1), pp. 840-849. ISSN 1077-2626. eISSN 1941-0506. Available under: doi: 10.1109/TVCG.2018.2865266
BibTex
@article{Wang2019-01Image-43553,
  year={2019},
  doi={10.1109/TVCG.2018.2865266},
  title={Image-Based Aspect Ratio Selection},
  number={1},
  volume={25},
  issn={1077-2626},
  journal={IEEE Transactions on Visualization and Computer Graphics},
  pages={840--849},
  author={Wang, Yunhai and Wang, Zeyu and Fu, Chi-Wing and Schmauder, Hansjörg and Deussen, Oliver and Weiskopf, Daniel}
}
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