Perceptually Linear Parameter Variations

Most visual analysis tasks require interactive adjustment of parameter values. In general, a linear variation of a parameter, using for instance a GUI slider, changes the visual result in a perceptually non‐linear way. This hampers interactive adjustment of parameters, especially in regions where ra...

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Bibliographic Details
Published in:Computer graphics forum Vol. 31; no. 2pt3; pp. 535 - 544
Main Authors: Lindow, Norbert, Baum, Daniel, Hege, Hans-Christian
Format: Journal Article
Language:English
Published: Oxford, UK Blackwell Publishing Ltd 01.05.2012
Subjects:
Computer graphics
Computer science
Construction
I.3.3 [Computing Methodologies]: Computer Graphics-Picture/Image Generation
I.4 [Computing Methodologies]: Image Processing and Computer Vision-Parameter Adjustment
Interactive
Mathematical analysis
Mathematical models
Measurement techniques
Nonlinearity
Studies
Tasks
Visual
ISSN:0167-7055, 1467-8659
Online Access:Get full text
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Summary:Most visual analysis tasks require interactive adjustment of parameter values. In general, a linear variation of a parameter, using for instance a GUI slider, changes the visual result in a perceptually non‐linear way. This hampers interactive adjustment of parameters, especially in regions where rapid perceptual changes occur. Selecting a good parameter value therefore remains a time‐consuming and often difficult task. We propose a novel technique to build a non‐linear function that maps a new parameter to the original parameter. By prefixing this function to the original parameter and using the new parameter as input, a linear relationship between input and visual feedback is obtained. To construct the non‐linear function, we measure the variation of the visual result using image metrics. Given a suitable perceptual image metric, perceptually linear image variations are achieved. We demonstrate the practical utility of our approach by implementing two common image metrics, a perceptual and a non‐perceptual one, and by applying the method to a few visual analysis tasks.
Bibliography:istex:76039C5D68D7AC465C2C8284664117BF512AFC9D
ArticleID:CGF3054
ark:/67375/WNG-3S43PMRC-F
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ISSN:0167-7055
1467-8659
DOI:10.1111/j.1467-8659.2012.03054.x