An efficient perception-based adaptive color to gray transformation

Authors:
L. Neumann;M. Čadík;A. Nemcsics
Affiliations:
ICREA, Barcelona, and VICOROB, University of Girona, Spain;Department of Computer Science and Engineering, Czech Technical University in Prague, Czech Republic;Technical University of Budapest, Hungary
Venue:
Computational Aesthetics'07 Proceedings of the Third Eurographics conference on Computational Aesthetics in Graphics, Visualization and Imaging
Year:
2007

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Abstract

The visualization of color images in gray scale has high practical and theoretical importance. Neither the existing local, gradient based methods, nor the fast global techniques give a satisfying result. We present a new color to grayscale transformation, based on the experimental background of the Coloroid system observations. We regard the color and luminance contrasts as a gradient field and we introduce a new simple, yet very efficient method to solve the inconsistency of the field. Having a consistent gradient field, we obtain the resultant image via fast direct integration. The complexity of the method is linear in the number of pixels, making it fast and suitable for high resolution images.