數位時代的快速發展，使文件資訊的傳遞更加便利及迅速，但也衍生出非法複製、盜印等問題，為了辨別文件真假，人們開始重視文件的防偽功能。以實體影像浮水印為例，目前具有變圖影像效果之浮水印隱藏效果不佳、隱藏資訊也較為固定單調及易於複製，且解密的方式也較為不便。結合以上問題，若以數位浮水印結合柱狀透鏡之變圖影像，可以增加浮水印之多樣化，並達到防偽效果，透過不同角度觀看柱狀透鏡讓解密更為方便。本研究結合數位浮水印與柱狀透鏡之變圖影像，製作由不同張數變圖原始影像組合而成之數位半色調變圖影像浮水印，於正常觀看下無法辨識，覆蓋柱狀透鏡解密後，即可得到隱藏之圖像，並經由不同角度觀看柱狀透鏡能得到變圖影像之效果。加密流程則需先設計多張二階化變圖原始影像之遮罩為素材，分別以數位半色調過網技術製成加密浮水印，再將加密浮水印分割成柱狀，交錯組合成數位半色調之變圖影像浮水印。經數位模擬解密後進行正確率評估，輸出於實體文件，覆蓋柱狀透鏡進行解密並觀察效果。經實驗結果，本研究可成功製作以兩張及三張原始圖製成數位半色調變圖影像浮水印，並加值應用於文創明信片產品。

With the rapid growth of information technology, the transmission and processing of information have been greatly accelerated. However, it has also led to problems such as illegal copying, pirating, etc. In order to authenticate the information on the security documents, researchers have begun to pay attention to the anti-counterfeiting technologies. With regard to digital watermark for the document example, the current hidden figuration has a poor image-switching effect. The hidden image is mundane, fixed and easy to imitate and the way of decoding is inconvenient. Based on the above problems, using the digital watermark with image-switching effect can achieve higher level of security effect, decode message by sliding the lenticular lens, and make it more convenient to use. The objective of this study is to create the digital watermark with image-switching watermark by digital halftoning technique with different numbers of the image-switching images. Decoding by the lenticular lens shows the hidden images and has an image-switching effect by sliding the lenticular lens. The method of encoding processes is first carried out by selecting different number of images to be the masks of watermarks. The masks are then used to design the watermarks by digital halftoning technique. The digital watermarks have been processed with image-switching watermark through image interlacing and regrouping. The digital simulation of the decoding and the recognition rate of watermark extraction have been implemented before output. Then the printed document is decoded by the lenticular lens and compares with the results of digital simulation. The result of this study has been successfully achieved using two and three hidden images to create the digital watermark with image-switching watermark. This study has been produced the add-valued postcard.

一、 英文部分
Alasia, A.V.（1976）. U. S. Patent No. 3937565. Whitestone, NY: U.S. Patent and Trademark Office.
Boonprasit, W. （2006）. A study of producing smoother gradients in the flexographic process on oriented polypropylene with UV ink by varying screening techniques, gradient lengths and the surrounding（Doctoral dissertation, Rochester Institute of Technology）. Retrieved from http://scholarworks.rit.edu/theses/3880/
Bender, W., Gruhl, D., Morimoto, N., & Lu, A. （1996）. Techniques for data hiding. IBM System Journal, 35（3&4）, 313-336.
Chavan, S., Shah, R., Poojary, R., Jose, J., & George, G. （2010）. A novel robust colour watermarking scheme for colour watermark images in frequency domain, Advances in Recent Technologies in Communication and Computing, 2010, 96-100.
Dickmann, F.（2010）. The potential of the lenticular foil technique for thematic cartography, The Cartographic Journal, 47(3), 250–256.
Fu, M. S., & Au, O. C.（2002）. Data hiding watermarking for halftone images,IEEE Transaction on Image Processing, 11（4）, 477-484.
Gruhl, D., & Bender. W.（1999）. Information hiding to foil the casual counterfeiter. In Gerhard, G. (Eds), Information Hiding: Vol.1525. Second International Workshop (pp. 1-15). Oregon, USA: IH’98 Portland. doi:10.1007/3-540-49380-8_1
H. Morishima, H. Nose, N. Taniguchi, K. Inoguchi, & S. Mat-sumura （1998）. Rear cross lenticular 3-D display without eyeglasses. Stereoscopic Displays and Virtual Reality Systems VII, 3295, 193-202.
Hecht, D.L.（1994）. Embedded data glyph technology for hardcopy digital documents. In Bares, J. (Eds.), Color Hard Copy and Graphic Arts III: Vol.2171 (pp.341-352). San Jose, CA: SPIE Press. doi:10.1117/12.175304
He, Z., & Bouman, C. A. (2004). AM/FM halftoning: digital halftoning through simultaneous modulation of dot size and dot density. Journal of Electronic Imaging, 13(2), 286–302. doi:10.1117/1.1669555
Ikegami, Y., & Miyauchi, A. (1975). U. S. Patent No. 3922074. Minami-ashigara, JA: U.S. Patent and Trademark Office.
Katsavounidis, I., & Kuo, C. C. J.（1997）. A multiscale error diffusion technique for digital halftoning. IEEE Trans. Image Processing, 6（3）, 483-490. doi:10.1109/83.557360
Li, W., Wan, X. X., & Jian, L. (2008). Digital halftoning and the application to remote sensing images. In Ewa Z, H., Derek, B., & Chun, R. (Eds), Computer Science and Software Engineering: Vol: 6, 2008 International Conference on (pp. 137-140). USA: IEEE Computer Society. doi:10.1109/CSSE.2008.1317
Liao, Y. I., Wang, H. C., Kuo, Y. H., & Tsai, Y. T. (2015). Lenticular display with infrared watermark by modified digital halftoning techniques. Scientia Iranica, Transaction B, Mechanical Engineering, 22(6), 2223-2228.
Philips, G.K.（2002）. Combining nanocharacter printing, digital watermarking and UV-coded taggents for optimal machine-readable security. In van Renesse, R. L. (Eds.), SPIE Proceedings: Vol. 4677, Optical Security and Counterfeit Deterrence Techniques IV, ( pp.150-158). Bellingham, US: SPIE Press. doi:10.1117/12.462707
Sharma, G., & Wang, S. G.（2004）. U. S. Patent No.7286682. Stamford, CT: U.S. Patent and Trademark Office.
Shimada, K.（2004）. Microstructural lines involving luminescence. In van Renesse, R. L. (Eds.), SPIE Proceedings Vol. 5310,Optical Security and Counterfeit Deterrence Techniques V, ( pp.125-132). San Jose, CA: SPIE Press. doi: 10.1117/12.526182
Tompkin, J., Heinzle, S., Kautz, J., & Matusik, W.（2013）. Content-adaptive lenticular prints. ACM Transactions on Graphics（TOG）- SIGGRAPH 2013 Conference Proceedings, 32（4）, 133.
Urruchi Del Pozo, V., Algorri Genaro, J. F., Sánchez-Pena, J. M., Geday, M. A., Arregui, X. Q., & Bennis, N.（2012）. Lenticular arrays based on liquid crystals. Opto-Electronics Review, 20（3）, 260-266.
Ulichney, R. A.（1987）. Digital Halftoning. Cambridge, MA: MIT Press.
van Renesse, R.L.（2005）. Optical Document Security （3rd ed.）. London: Artech House.
Xie, Y., Yuan, Y., Tan, H., & Wang, J.（2014）. Effect of embedding way on printed watermarking image by lithography. 2014 International Conference on Cyber-Enabled Distributed Computing and Knowledge Discovery, 286-289. doi:10.1109/CyberC.2014.58
Žiljak, I., Vujic, J. Z., & Pap, K.（2007, Sep）. Flip flop and spatial（3D）graphics in lenticular technique. In Enlund, N., & Lovrecˇek, M. (Eds.), Advances in printing and media technology: Vol: XXXIV (pp.277-284). Zagreb: Acta Graphica Publishers.
二、 中文部分
王希俊、鄭雅文（民104）。浮水印圖像及其製造方法，專利編號I497443。臺北市：經濟部智慧財產局。
王希俊、宋卓翰、陳永輝（民98）。 隱藏字之自動化製作方法，專利編號I250471。臺北市：經濟部智慧財產局。
江瑞璋（民97）。傳統、調頻和混合網點的比較。印刷技術季刊，2-28。
林煜翔 （民96）。網點偏移在多角度資訊隱藏之研究 （碩士論文）。取自台灣博碩士論文系統。（系統編號477006M96-16）
林行健（民94）。印刷設計概論。台北市：視傳文化。
邱鈺嵐 （民104）。利用不同間距線網嵌入浮水印之研究 （未出版之碩士論文）。國立臺灣師範大學，台北市。
吳惠君 （民96）。斜向網點雙重加密之研究 （碩士論文）。取自台灣博碩士論文系統。（系統編號477006M96-13）
鄭雅文（民102）。改進式混合網點應用於數位浮水印之研究 （未出版之碩士論文）。國立臺灣師範大學，台北市。
張家龍（民97）。用於紅外線驗證之數位資訊加密系統（碩士論文）。取自台灣博碩士論文系統。（系統編號477006M97-7）
廖嬿貽（民103）。柱狀透鏡變圖技術與紅外線浮水印整合應用之研究 （未出版之碩士論文）。國立臺灣師範大學，台北市。
蔡昇融 （民96）。以特殊網點建構證件安全之研究 （碩士論文）。取自台灣博碩士論文系統。（系統編號477006M96-12）
蔡朝旭、陳政寰（民93）。立體顯示器技術。台北市 : 行政院國科會光電小組。
劉文心（民99）。以紅外線浮水印為基礎之擴增實境創新研究（碩士論文）。取自台灣博碩士論文系統。（系統編號477006M98-25）
蕭佩琪、王希俊、連啟明 （民93）。文件底紋之混合網點數位浮水印技術。第
屆數位典藏技術研討會論文集，台北市，223-230。
三、 其他資料
Monetary Authority of Singapore (Producer). (2015). SG50 Commemorative Notes [Audio podcast]. Retrieved from https:// www.youtube.com/watch?v=pb1MR4YMIXA
Moi, P. (2015, October 10). Stamps with hidden image – update [Image file]. Retrieved from http:// philaquelymoi.blogspot.tw/2015/10/stamps-with-hidden-image-update.html
Royal Mail Stamps (Producer). (2011). Thunderbirds are GO – Royal Mail releases ‘The Genius of Gerry Anderson’ stamps, 11 Jan 2011 [Audio podcast]. Retrieved from https://www.youtube.com/watch?v=6T3u9CherQw#t=73