題名: Hiding Data in Halftone Images 作者: Tseng, H. W.;Chang, C. C
關鍵詞: data hiding;error diffusion;halftone;visual cryptography 日期: 2005-09
上傳時間: 2009-12-17T06:58:30Z 出版者: Asia University
摘要: Most recent papers about visual cryptography for halftone images are dedicated to get a higher contrast decoded image. However, the hidden visual pattern often blends into the background image and leads to a confused image. In this paper, we propose an improved method for halftone image hiding. By using the proposed method, the background image can be eliminated and the hidden visual pattern can be revealed precisely. Experimental results show that the decoded visual patterns could reveal good visual quality under various kinds of input patterns. Furthermore, better visual quality can be obtained when more halftone images are overlaid.