Convolutional neural network-based digital image steganalysis method
A convolutional neural network and digital image technology, applied in the field of digital image steganalysis based on convolutional neural network, can solve problems such as low analysis performance and complex effective feature design, and achieve high accuracy
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Embodiment 1
[0021] Such as image 3 As shown, the convolutional neural network consists of multiple convolutional layers connected in series, and the input of the latter layer is the output of the previous layer. Each convolutional layer contains the following three basic operations: convolution, nonlinear activation, and pooling.
[0022] The process of convolution operation is as follows figure 1 shown. The input data is convolved with a convolution kernel of a predefined size, and the corresponding convolution feature map can be obtained. One convolution kernel corresponds to one feature map. When multiple convolution kernels are used, multiple feature maps will be output.
[0023] Non-linear activation is to transform the feature map obtained by convolution point-by-point using a non-linear activation function. A commonly used activation function is Rectified Linear Unit (ReLU), which is defined as:
[0024] f(x)=max(0,x)
[0025] That is, keep all signals greater than 0, and se...
Embodiment 2
[0044] The convolutional neural network used in the present invention does not need complex artificial feature design, and can complete feature extraction and classification within a set of frameworks, so that each step can be optimized at the same time, greatly reducing the difficulty of steganalysis algorithm design . In order to verify the performance of the proposed algorithm, the present invention implements the proposed algorithm based on the deep learning framework Caffe. The proposed network is referred to as TLU-CNN in the following. All experiments are carried out on image databases BOSSBase and BOWS2, which are commonly used in steganalysis. In order to be able to compute with GPU, the training and testing image sizes are scaled from 512×512 to 256×256.
[0045] In this embodiment, the current leading digital image steganalysis algorithm——SRM is selected as a comparison, and the experimental results obtained on the three currently safest three adaptive steganograp...
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