基於最佳權重預測法之九宮格式差值擴張資訊隱藏技術 = Differenc...
國立高雄大學資訊工程學系碩士班

 

  • 基於最佳權重預測法之九宮格式差值擴張資訊隱藏技術 = Difference Expansion of Data Hiding Based on The Prediction of Optimal Weights of 3×3 Box Filter
  • Record Type: Language materials, printed : monographic
    Paralel Title: Difference Expansion of Data Hiding Based on The Prediction of Optimal Weights of 3×3 Box Filter
    Author: 林坪亨,
    Secondary Intellectual Responsibility: 國立高雄大學
    Place of Publication: [高雄市]
    Published: 撰者;
    Year of Publication: 2011[民100]
    Description: 43葉圖,表格 : 30公分;
    Subject: 最佳化權重
    Subject: Optimal Weight
    Online resource: http://handle.ncl.edu.tw/11296/ndltd/02844448751770306268
    Notes: 參考書目:葉35-36
    Summary: 在本研究中,我們提出新的演算法來增強差值擴張的偽裝影像品質。我們的演算法引入最佳化權重及九宮格式,來改良原差值擴張資訊隱藏技術。根據九宮格式的特性,可偵測更多方向的變動,可適用於複雜的影像。而最佳化權重的設定,使預測差值的產生盡可能朝最多差值為零的個數去收斂,使得偽裝影像保持低失真度。實驗結果顯示,在一樣的嵌入量的前提下與其他方法相比,針對複雜影像,平均 PSNR 增加 6.89%。因此,我們的方法有利於將機密資訊藏入複雜影像的同時,亦能兼顧偽裝影像的品質。 In this research, we present a new method to improve the quality of stego image. We improve the difference expansion method by using optimal weights and 3×3 box filter. The 3×3 box filter is suitable for complicated image because 3×3 box filter can detect more direction of each pixel. The optimal weights keep high PSNR of the stego image because optimal weights generate more zero-difference. Experiment shows that our method arises 6.89% PSNR than the presented method for complicated image. Therefore, our method hide secret bits with high PSNR for the complicated image.
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310002286840 博碩士論文區(二樓) 不外借資料 學位論文 TH 008M/0019 464103 4440 2011 一般使用(Normal) On shelf 0
310002286857 博碩士論文區(二樓) 不外借資料 學位論文 TH 008M/0019 464103 4440 2011 c.2 一般使用(Normal) On shelf 0
  • 2 records • Pages 1 •
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