Encrypting image by assembling the fractal-image addition method and the binary encoding method
Encrypting image by assembling the fractal-image addition method and the binary encoding method
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DOI：
10.1016/j.optcom.2012.01.028
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发表时间：
2012-05-01
影响因子：
2.4
通讯作者：
Yeh, Sheng Lih
中科院分区：
文献类型：
--
作者：
Lin, Kuang Tsan;Yeh, Sheng Lih
将分形图像相加法和二进制编码法组合起来，形成一种混合加密方法，用于加密数字隐蔽图像。对于这种混合方法，主图像被用来创建一个公开的图像与隐蔽图像的信息。首先，利用分形图像叠加法，将分形图像与隐藏图像叠加，形成图像混合矩阵。然后，将图像混合矩阵的所有像素值转换为二进制数据。最后，将二进制数据编码到宿主图像中以创建公开图像。公开图像的像素包含八组用于重建隐藏图像的代码。这八组代码是标识代码、行数量代码、隐像尺寸代码、分形图像数量代码、起始像素代码、字符数量代码、字符代码和信息代码。外显图像和宿主图像在眼睛看来几乎是一样的。此外，隐藏图像可以直接从公开图像重建，而不使用宿主图像。最重要的特点是，重建的隐藏图像是相同的原始隐藏图像，即没有失真的解码工作。(C)2012 Elsevier B.V.保留所有权利。
The fractal-image addition method and the binary encoding method are assembled to form a hybrid method for encrypting a digital covert image. For this hybrid method, a host image is used to create an overt image with the information of the covert image. First, the fractal-image addition method is used to add some fractal images and the covert image to form an image-mixing matrix. Then, all the pixel values of the image-mixing matrix are transferred into binary data. Finally, the binary data are encoded into the host image to create an overt image. The pixels of the overt image contain eight groups of codes used for reconstructing the covert image. The eight groups of codes are identification codes, row amount codes, covert-image dimension codes, fractal-image amount codes, starting-pixel codes, character amount codes, character codes, and information codes. The overt image and the host image look almost the same for eyes. Furthermore, the covert image can be directly reconstructed from the overt image without using the host image. The most important feature is that the reconstructed covert image is identical to the original covert image, i.e. there is no distortion in the decoding work. (C) 2012 Elsevier B.V. All rights reserved.