The invention provides an
image steganography method, device and equipment for user level-to-level management, and a medium, and the method comprises the steps: carrying out the compression of a DWT coefficient of a
plaintext image through employing a
compressed sensing technology, carrying out the partitioning, and dynamically setting a differentiated threshold value for each image block through employing a threshold secret
image sharing method; and in combination with a double-image embedding method, the image is steganographically written into a carrier image, and finally a
ciphertext image with visual significance is generated. And different threshold values are set for different image blocks, so that hierarchical
steganography and extraction of the image are realized. When the number of users participating in decryption is smaller than a set threshold value, any effective information related to the
plaintext image cannot be obtained; when the number of the users participating in decryption is greater than or equal to the threshold value, the related information of the
plaintext image can be obtained, and the reconstruction quality of the plaintext image is improved along with the increase of the number of the users participating in decryption.