Blind detection information hiding and extracting method based on image texture features

The invention discloses a blind detection information hiding and extracting method based on image texture features. The method comprises the following steps of: for a carrier JPEG image, calculating an entropy value in a texture feature gray level co-occurrence matrix; calculating a maximum singular value of the SVD by using a DCT quantization coefficient obtained after entropy decoding of the JPEG compressed image data; and carrying out RS coding on the to-be-hidden information and hiding the information in the carrier graph to obtain a secret-carrying image. According to the method, information hiding is carried out by utilizing the intrinsic property of the maximum singular value, so that the robustness of the image in the transmission process can be improved. The invention also discloses an image texture feature-based blind detection information extraction method. The method comprises the following steps of: A, performing entropy decoding on JPEG compressed image data to obtain a DCT quantization coeffici