Contrast Brushes:
Interactive Image Enhancement by Direct Manipulation

Mark Grundland

Web: www.Eyemaginary.com
Email: Mark@Eyemaginary.com

Original Image	Contrast Brush Enhanced Image

Citation:

Contrast Brushes: Interactive Image Enhancement by Direct Manipulation
Neil A. Dodgson, Mark Grundland, and Rahul Vohra
Computational Aesthetics 2009, pp. 107-114, EUROGRAPHICS, (2009). ISSN 1816-0859.
Presented as a talk at the EUROGRAPHICS Workshop on Computational Aesthetics in Graphics, Visualization and Imaging (Victoria, Canada, 28-30 May 2009).

Abstract:

We implement contrast brushes, an interactive method for directly brushing contrast adjustments onto an image. The adjustments are performed by a histogram warping approach that implements tone mapping using piecewise defined, continuously differentiable, monotonic splines. This allows the independent specification of tone changes and contrast adjustments without causing halo or contouring artifacts, while still endowing contrast brushes with intelligible parameters that render their effects predictable for the user. A user study demonstrates that contrast brushes can prove more effective than Adobe Photoshop's interactive contrast enhancement tools.

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