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Cornsweet surfaces for selective contrast enhancement

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journal contribution
posted on 21.07.2020 by H Lieng, T Pouli, E Reinhard, J Kosinka, Neil Dodgson
A typical goal when enhancing the contrast of images is to increase the perceived contrast without altering the original feel of the image. Such contrast enhancement can be achieved by modelling Cornsweet profiles into the image. We demonstrate that previous methods aiming to model Cornsweet profiles for contrast enhancement, often employing the unsharp mask operator, are not robust to image content. To achieve robustness, we propose a fundamentally different vector-centric approach with Cornsweet surfaces. Cornsweet surfaces are parametrised 3D surfaces (2D in space, 1D in luminance enhancement) that are extruded or depressed in the luminance dimension to create countershading that respects image structure. In contrast to previous methods, our method is robust against the topology of the edges to be enhanced and the relative luminance across those edges. In user trials, our solution was significantly preferred over the most related contrast enhancement method. © 2014 Elsevier Ltd.

History

Preferred citation

Lieng, H., Pouli, T., Reinhard, E., Kosinka, J. & Dodgson, N. A. (2014). Cornsweet surfaces for selective contrast enhancement. Computers and Graphics, 42(1), 1-13. https://doi.org/10.1016/j.cag.2014.04.001

Journal title

Computers and Graphics

Volume

42

Issue

1

Publication date

01/08/2014

Pagination

1-13

Publisher

Elsevier BV

Publication status

Published

Contribution type

Article

Online publication date

16/04/2014

ISSN

0097-8493

eISSN

1873-7684

Language

en

Exports