title: A new pixels flipping method for huge watermarking capacity of the invoice font image.
abstract: Invoice printing just has two-color printing, so invoice font image can be seen as binary image. To embed watermarks into invoice image, the pixels need to be flipped. The more huge the watermark is, the more the pixels need to be flipped. We proposed a new pixels flipping method in invoice image for huge watermarking capacity. The pixels flipping method includes one novel interpolation method for binary image, one flippable pixels evaluation mechanism, and one denoising method based on gravity center and chaos degree. The proposed interpolation method ensures that the invoice image keeps features well after scaling. The flippable pixels evaluation mechanism ensures that the pixels keep better connectivity and smoothness and the pattern has highest structural similarity after flipping. The proposed denoising method makes invoice font image smoother and fiter for human vision. Experiments show that the proposed flipping method not only keeps the invoice font structure well but also improves watermarking capacity.
authors.affiliation: Institute of Graphics and Image, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, China.
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.affiliation: Institute of Graphics and Image, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, China.
authors.forename: Qingzheng
authors.initials: Q
authors.lastname: Hou
authors.affiliation: Institute of Graphics and Image, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, China.
authors.forename: Jianfeng
authors.initials: J
authors.lastname: Lu
authors.affiliation: Institute of Graphics and Image, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, China.
authors.forename: Qishuai
authors.identifier: 0000-0002-9935-7047
authors.initials: Q
authors.lastname: Xu
authors.affiliation: Institute of Digital Media, Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, China.
authors.forename: Junping
authors.initials: J
authors.lastname: Dai
authors.affiliation: University of Yamanashi, Yamanashi-ken 409-3866, Japan.
authors.forename: Xiaoyang
authors.initials: X
authors.lastname: Mao
authors.affiliation: Department of Information Engineering and Computer Science, Feng Chia University, Taichung 40724, Taiwan ; Department of Computer Science and Information Engineering, Asia University, Taichung 41354, Taiwan.
authors.forename: Chin-Chen
authors.initials: CC
authors.lastname: Chang
mesh_terms: D000465:Algorithms; D016494:Computer Security; D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D011327:Printing