Error Correcting Watermarking on Ordered Dithered Halftone Images

• Main Authors: Hung, Jui-Hung, 洪瑞鴻
• Other Authors: Lien, Kuo-Jen
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/71745557549510093432

碩士 === 輔仁大學 === 資訊工程學系 === 100 === In this paper, we provide a watermarking technology on Ordered Dither Halftone Images. It can be used to detect images whether there has been tampered with, and to recover the tampered image if tampering rates less than a certain extent. The cover image is first partitioned into blocks, then a special scheme is provide to embed Reed-Solomon Code of the cover halftone image into the blocks. This method can not only assures the integrity of the halftone image, but also can recover it for small modifications during communication.