IEEE Transactions on Evolutionary Computation
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This paper proposes an algorithm named Neighborhood-and Crowding-based Self-Adaptive Differential Evolution (NCjDE) for multi-optima problems. This paper also proposes its application for semi-fragile watermarking of colored two-dimensional (2D) barcodes with adequate semi-fragileness for copy detection, which are displayed on mobile phone screen and used for quick verification of items such as airplane boarding passes and coupons.