| Summary: | 碩士 === 國立交通大學 === 資訊科學與工程研究所 === 94 === Three types of art images are investigated in this study, namely, digital puzzle image, digital pointillistic image, and digital circular-dotted image. Methods for automatic generation of these types of images and data hiding in them are proposed.
In digital puzzle images, three different puzzle piece features, namely, orientation, size, and angle, are utilized for data hiding in the proposed methods. The orientations of puzzle pieces are used for covert communication. The sizes of puzzle pieces are used for copyright protection. And the angles of puzzle pieces are used for image authentication. A complete system to create digital puzzle images is also proposed, which may be applied to hide three kinds of data sequentially. Besides, we can implement the concept of information sharing by separating a puzzle image into a number of puzzle pieces, and each secret sharing participant can take one part of them.
In digital pointillistic images, only one feature is used for data hiding. That is, we utilize the variations of the RGB values of each color dot of a digital pointillistic image to implement the data hiding works. In digital circular-dotted images, we also use only one feature for data hiding, namely, the drawing order of the circular dots of a digital circular-dotted image. We can achieve two applications of data hiding, covert communication and copyright protection by embedding data in digital pointillistic images or in digital circular-dotted images.
Experimental results show the feasibility of the proposed methods and systems.
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