Spatial domain steganography method based on multi-scale filter image enhancement
An image enhancement and filter technology, applied in image enhancement, image analysis, image communication, etc., can solve the problems of insignificant enhancement effect of edge area and complex texture area, limited details of single filter enhancement, etc., to achieve enhanced texture area. Effects of noise spots, reduction enhancement, and safety enhancement
Active Publication Date: 2020-10-20
WUHAN UNIV
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However, most of these two sharpening methods use a single filter for enhancement, and the details that can be enhanced by a single filter are limited, which leads to insignificant enhancement effects on edge areas and complex texture areas.
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[0050] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0051] Such as figure 2 As shown, a kind of spatial domain steganography method based on multi-scale filter image enhancement provided by the present invention comprises the following steps:
[0052] Step 1, input the original image in pgm format, make a copy of the original image as the cover image;
[0053] Step 2, embedding the hidden information on the original image to obtain the stego image corresponding to the cover image, the specific implementation method is as follows;
[0054] Step 2.1, use the multi-scale Gaussian filter to sharpen the original image, and obtain the sharpening result E of the Gaussian filter g ;
[0055] In order to enhance the texture area and edge area in the image as much as possible, this method uses filters of various sizes, aiming at enhancing the texture area and edge area existing in th...
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The invention discloses a spatial domain image steganography enhancement method based on a multi-scale filter. The method comprises steps: firstly, an enhancement method of a multi-scale filter is provided, and hidden information is enable to tend to be embedded into texture regions and edge regions by enhancing the texture regions and the edge regions; secondly, distortion cost is obtained through a mainstream spatial domain steganography algorithm, mean filtering is carried out on the distortion cost based on a diffusion principle, and an adjusting method enabling an embedded area to be moregathered is provided. Through the combination of an image enhancement algorithm and a diffusion principle, the improvement of an existing mainstream spatial domain steganography algorithm is realized, and the most advanced detection of high-dimensional steganography analysis features at present can be resisted. From the perspective of image enhancement, it is ensured that edge areas and texture areas of different scales are enhanced based on a multi-scale filter, so that an embedded area of the secret information is closer to the security areas. The method has high universality and is beneficial to improving the safety of the spatial domain steganography algorithm.
Description
technical field [0001] The invention relates to the technical field of multimedia security and digital media processing, in particular to the technical field of steganography algorithm for embedding secret information on images. Background technique [0002] Modern steganography is a technology that uses digital media for secret communication, and its goal is to hide secret information in digital media such as images, audio, and video. With the popularity of the Internet and the ease of dissemination of pictures, digital images have become a hidden carrier that is very easy to obtain. Among them, airspace images, as a lossless original image format, have been widely used because of their losslessness and the ability to convert them into other image formats. Various steganographic algorithms based on airspace images emerge in an endless stream. However, with the introduction of steganalysis algorithms based on high-dimensional features, these algorithms can effectively detec...
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IPC IPC(8): G06T5/00G06T7/13G06T7/40G06K9/62G06F21/60H04N1/32H04N1/44
CPCG06T7/13G06T7/40G06F21/602H04N1/32267H04N1/44G06F18/214G06T5/73G06T5/70
Inventor 王丽娜吴俊锜翟黎明嘉炬任魏翔方灿铭吴畑
Owner WUHAN UNIV