In this paper, we propose an efficient algorithm for the measure of contrast in digital images. It applies locally, at various sub-sampled levels, a simplified computation of local contrast and finally it recombines all the values to obtain a global measure; in this way, this measure has a computational complexity lower than alternative local methods, keeping a comparable level of correctness in the contrast estimate. In order to test the soundness of our method, we have carried out two kinds of test: objective and subjective. Then the results have been compared with those of the algorithms proposed by other researchers. Tests and results are presented and discussed in detail.
A Proposal for Contrast Measure in Digital Images / A. Rizzi, T. Algeri, G. Medeghini, D. Marini - In: Proc. of CGIV[s.l] : IS&T The Society for Imaging Science and Technology, 2004. - ISBN 0-89208-250-X. - pp. 187-192 (( Intervento presentato al III. convegno CGIV- European Conference on Color in Graphics, Imaging and Vision tenutosi a Aachen, Germany nel 2004.
A Proposal for Contrast Measure in Digital Images
A. RizziPrimo
;D. MariniUltimo
2004
Abstract
In this paper, we propose an efficient algorithm for the measure of contrast in digital images. It applies locally, at various sub-sampled levels, a simplified computation of local contrast and finally it recombines all the values to obtain a global measure; in this way, this measure has a computational complexity lower than alternative local methods, keeping a comparable level of correctness in the contrast estimate. In order to test the soundness of our method, we have carried out two kinds of test: objective and subjective. Then the results have been compared with those of the algorithms proposed by other researchers. Tests and results are presented and discussed in detail.
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