Edge detection-based grayscale image steganography method

Abstract

The present invention discloses an edge detection-based grayscale image steganography method. The objective of the invention is to carry out concealed communication in a public transport channel and prevent the theft and disclosure of confidential information. According to the method, a grayscale image is divided into two parts according to an edge detection method, namely a contour pixel sequence and a non-contour pixel sequence; based on different characteristics of the pixel sequence obtained through the image edge detection and other pixels, steganographic data are embedded into a contour part and a non-contour part according to different embedding rates; and therefore, high efficiency, reliability and concealment of an steganographic image can be improved in aspects such as image sensing and security. The method is divided into two stages, namely, the embedding stage and extraction stage of confidential information; in an embedding process, in order to ensure the integrity of the confidential information, contour extraction is performed by using the high bits of the pixel value of an image, and the embedding of the confidential information is performed by using the low bits of the pixel value of the image; in the embedding stage, the encryption of the confidential information and the conversion of a binary sequence are ensured, and then the binary sequence is embedded into the pixel value of the image; and in the extraction stage, it can be ensured that the binary sequence can be extracted from the steganographic image, and therefore, the confidential information can be obtained through decoding conversion and restoration.

Description

technical field [0001] The invention relates to the principle of an image steganography method based on edge detection, which realizes secret transmission in an open communication network. Background technique [0002] The current edge detection-based methods, such as Modi et al. (2013), use the edge detection method for image steganography, which is to steganize 2-bit information at the edge pixels, which improves the steganography from the perspective of a single channel. Rate. If an image is steganographiced from three channels, the receiver performs edge detection after receiving the steganographic image, which will be different from the edge detection of the original carrier image, so the steganographic image cannot be paid. [0003] Therefore, a compromise solution is adopted. For a color image, one channel is selected for edge detection to determine which positions are used for steganographic 2-bit information, and the remaining 2 channels are used for image steganog...

AI Technical Summary

Problems solved by technology

The embedding rules of this method are more complicated, and the embedding rate is not high

[0005] Using steganography and edge as keywords, there are 67 related patent records found in the search. After analysis, none of them are related to the patent content of this application.

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