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植基於空間切割之三維模型秘密分享技術之介紹

Yuan-Yu Tsai,

Abstract


在本文中,我們介紹Tsai 學者所提出的三維模型秘密分享技術。秘密分享是個高度受到重視的研究領域,已有許多相關研究應用至二維影像上。然而,秘密分享演算法並未隨著三維模型多媒體技術的快速發展而逐步增長,因此將秘密分享的應用延伸到三維模型就顯得十分重要。Tsai 學者提出一套植基於空間切割技術之可回復式點雲模型秘密分享技術,欲分享的點雲模型中的每個頂點會先被編碼成一連串落在[0,p-1]的整數值,其中p是一個預設的質數。接著,將編碼後的整數值取代分享多項式的係數取得分享值,並透過表面重建技術和取樣概念的整合,提供每位參與者一個具有足夠模型複雜度的掩護模型。最後,將分享值嵌入至每位參與者的掩護模型中,便可得到帶有分享值的偽裝模型。實驗結果證實,Tsai 學者所提出的技術支援可回復式資訊隱藏,分享值能有更高層次的隱私性與強韌性,是第一篇整合秘密分享與資訊隱藏的三維模型秘密分享的文獻。This paper introduces Tsai’s secret 3D model sharing algorithm. The proposed algorithm is the first secret sharing scheme to include reversible data hiding for 3D point geometries. Each point is first encoded into a series of integer values within 0 and p-1 based on space subdivision, where p is a predefined prime number. The integer values then substitute all coefficients of the sharing polynomial to obtain the share values. A cover model with sufficient model complexity is generated by integrating the surface reconstruction and the sampling concepts. Finally, each participant has a separate 3D stego model with embedded share values. Experimental results show that Tsai’s proposed technique supports reversible data hiding and the share values have higher levels of privacy and improved robustness.

Keywords


三維模型; 可回復式資訊隱藏; 秘密分享; 取樣; 空間切割; 表面重建; 3D Models; Reversible Data Hiding; Secret 3D Model Sharing; Sampling; Space Subdivision; Surface Reconstruction

Citation Format:
Yuan-Yu Tsai, "植基於空間切割之三維模型秘密分享技術之介紹," Communications of the CCISA, vol. 22, no. 2 , pp. 24-39, Apr. 2016.

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