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We introduce the contour spectrum, a user interface component for improving user interaction and quantification in the visualization of isocontours. The contour spectrum is a signature consisting of a variety of scalar data and contour attributes, computed over the range of function values. We explore the use of surface area, volume, and gradient integral of the contour. Computed properties are presented to the user as a collection of 1D plots relative to the isovalue, giving the user a quantitative measure of the function to assist in selecting relevant isovalues for informative visualization. For timevarying data, properties can be computed over time, and displayed using a 2D interface, giving the user an overview of the time-varying function, and allowing interaction in both isovalue and timestep. The effectiveness of the current system and potential extensions are discussed. Keywords: Visualization, Scalar Data, User Interfaces 1 Introduction Exploratory visualization is an itera...
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