| 基于离散余弦变换的脆弱水印智能优化算法 |
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| 引用本文： | 刘艳.基于离散余弦变换的脆弱水印智能优化算法[J].钦州学院学报,2011,26(3). |
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| 作者姓名： | 刘艳 |
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| 作者单位： | 桂林医学院附属医院教学管理部,广西桂林,541001 |
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| 摘 要： | 基于离散余弦变换的脆弱数字水印计算过程中,由于浮点数-整数转换过程舍入误差造成影像峰值信噪比(PSNR)降低,提取水印标准互相关相似度(NC)低,采用遗传算法、克隆选择算法等智能优化算法,可以修正变换过程产生的舍入误差,提高基于离散余弦变换的脆弱数字水印的性能。并且这一思路能够进一步用在其他数字水印技术中,采用智能算法来修正某些关键计算步骤引入的舍入误差。
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| 关 键 词： | 智能算法 数字水印 离散余弦变换 舍入误差 |
DCT-based Fragile Watermarking Intelligent Optimization Algorithms |
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| LIU Yan.DCT-based Fragile Watermarking Intelligent Optimization Algorithms[J].Journal of Qinzhou University,2011,26(3). |
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| Authors: | LIU Yan |
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| Institution: | LIU Yan (Department of Teaching Management,Affiliated Hospital of Guilin Medical University,Guilin 541001,China) |
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| Abstract: | In the DCT-based fragile watermarking calculating process,the rounding errors incurred by floating number-integer transformation results in the reduction of image's Peak Signal to Noise Ratio(PNSR) and low similarity degree of watermarking standard.The resort to such intelligent optimization algorithms as genetic algorithm and clonal selection algorithm is able to rectify the rounding errors and improve the performance of the DCT-based fragile watermarking.And combined with the use of intelligent algorithms... |
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| Keywords: | intelligent optimization algorithm watermark discrete cosine transform(DCT) round error |
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