Image encryption domain reversible information hiding system and method based on image segmentation and image spatial correlation

An image space and image segmentation technology, applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of large distortion of decryption results, difficult feature extraction and utilization, and irregularity of plaintext content.

Active Publication Date: 2019-02-15
SOUTHEAST UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The main reasons for the above difficulties: On the one hand, the current information hiding technology greatly depends on the encoding technology of the carrier, the media type it belongs to, or the attributes of the transform domain, and the process of embedding information must re-quantize and modify the characteristics of the carrier data, but Encryption will make the plaintext content present the greatest irregularity and uncertainty, and the original features are difficult to

Method used

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  • Image encryption domain reversible information hiding system and method based on image segmentation and image spatial correlation
  • Image encryption domain reversible information hiding system and method based on image segmentation and image spatial correlation
  • Image encryption domain reversible information hiding system and method based on image segmentation and image spatial correlation

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Embodiment 1

[0080] Such as figure 1 As shown, the present invention first proposes an image encryption domain reversible information hiding system based on image segmentation and image spatial correlation, the system includes an encrypted image generation module, an information embedding module, an information extraction and image reconstruction module, wherein:

[0081] The encrypted image generating module is configured to perform the following actions: the image owner divides the original image into non-overlapping black parts, gray parts and white parts. Use the pixels in the gray part to predict the pixels in the black part, generate a prediction error histogram, use the multi-histogram translation method to embed the least significant bit of the white part pixels into the black part, generate an image to be encrypted, and use the encryption key to generate encryption The stream sequence encrypts the image to be encrypted, generates the encrypted image, and sends it to the informatio...

Embodiment 2

[0085] Such as figure 2 As shown, the present invention also proposes a method for reversible information hiding in the image encryption domain based on image segmentation and image spatial correlation, and the specific steps are as follows:

[0086] 1) Encrypted image generation:

[0087] 1.1) Remove the last column and last row of the image, and divide the image into three parts, namely the gray part: the horizontal and vertical coordinates satisfy mod(i+j, 2)=1, and the black part: the horizontal coordinates satisfy mod(i+j, 2)=1, the ordinate satisfies mod(i,2)=0, the white part: the abscissa satisfies mod(i+j,2)=1, the ordinate satisfies mod(i,2)=1;

[0088] 1.2) Predict the pixel value of the pixel x in the black part according to the diamond prediction:

[0089]

[0090] where v 1 ,v 2 ,v 3 ,v 4 Represents the adjacent pixel values ​​​​up, down, left, and right of the pixel value x. Forecast Generate Predicted Values generate forecast error

[0091] 1.3)...

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Abstract

The invention discloses an image encryption domain reversible information hiding system and method based on image segmentation and image spatial correlation. At an image sensing end, an image owner segments an image into three parts through a designed image segmentation algorithm: a black part, a white part and a gray part; the gray part is used for predicting the black part by adopting a way of combining a prediction error extension and multi-histogram translation, the least significant bit of the white part can be embedded into the black part of the image through a self-adaptive reversible information hiding algorithm, and then an encrypted image is generated through an encryption key; an information hider embeds secret information into the image through a hiding key. At an image receiving end, a receiver can firstly extract the secret information and then recover an original image as well as firstly recover the original image and then extract the secret information, thereby realizing the reversibility of the secret information and the original image. The system disclosed by the invention has the advantage of being good in secrecy and large in embedding capacity.

Description

technical field [0001] The invention relates to an image encryption domain information hiding technology, which belongs to the technical field of reversible information hiding and image processing. Background technique [0002] As an important branch in the field of information security, information hiding technology has developed rapidly since the new century, especially in the fields of digital copyright and secret communication. Reversible data hiding technology has been widely developed due to its ability to achieve reversible recovery of carrier objects and high embedding capacity. [0003] On this basis, in order to further ensure the confidentiality of images, a reversible information hiding algorithm based on image encryption domain is proposed. As an important combination of signal processing technology and information hiding technology in the encrypted domain, reversible information hiding in the ciphertext domain can play a double insurance role in information se...

Claims

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Application Information

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IPC IPC(8): H04N19/467H04N1/32
CPCH04N1/32272H04N19/467
Inventor 张毅锋宋畅
Owner SOUTHEAST UNIV
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