【作者】 葛惊寰； 潘杰； 方恩印；

【Author】 Jinghuan Ge;Jie Pan;Enyin Fang;Department of Printing and Packaging Engineering,Shanghai Publishing and Printing College;

【机构】 上海出版印刷高等专科学校印刷包装工程系；

【摘要】 艺术加网方法利用各种形状的图形或图案代替常规网点,达到再现图像阶调和层次的目的,成为目前数字印刷防伪领域一种十分理想的手段。为了取得更好的防伪效果,本文将数字水印防伪技术和艺术加网方法相结合,提出一种针对艺术加网图像的数字水印防伪方法。新算法通过将二值图像分块水印防伪技术应用于艺术加网图像,不仅实现对艺术加网图像进行水印的嵌入,同时可以从高质量的图像中对原水印进行恢复,并且对艺术加网图像的真伪进行检验。实验结果表明,本方法可以有效地针对艺术加网图像实现嵌入水印不可见、水印隐藏和验证以及水印篡改检验的功能。更多还原

【Abstract】 Artistic screening is a new halftone technology for producing an illusion of continuous tones by creating artistic screens that may take any desired shape and screening effects.This screening technology is tuned to convey additional information for artistic purposes,which is desirable for digital anti-counterfeiting in today’s printing industry.In order to achieve better anti-counterfeiting results,a novel data-hiding algorithm is proposed combining the artistic screening technology with digital watermarking.We present a digital watermarking algorithm in artistic screening images that divides the images into blocks and embeds a fixed number of bits in each block by changing some pixels in that block.Experiments show that watermark-embedded artistic screening image has good secure data hiding results and tampering of content can be detected successfully.更多还原