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In this paper, a novel blind color image watermarking based on Contourlet transform and Hessenberg decomposition is proposed to protect digital copyright of color image. Firstly, each color channel of the host image is transformed by Contourlet transform and its low frequency sub-band is divided into 4 × 4 non-overlap coefficient block. Secondly, the(More)
This paper presents a discrete bee colony algorithm for solving the blocking flow shop scheduling problem with makespan criterion. Based on the idea of iterated greedy algorithm, some new schemes for employed bee, onlooker bee and scout bee are designed. The performance of the proposed algorithm is tested on the well-known benchmark set of Taillard, and the(More)
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