Evaluation of the capacity of steganographic dct domain model image in mcuu

The present invention is based on the distortion control model undetectable (abbreviated as MCUU model) under discloses a method of writing capacity of the DCT domain hidden JPEG image is evaluated, it obtained steganographic capacity not only with the image size itself, the image complexity, but also to follow the specific carrier bands, steganography operator and theoretical strength and other factors related to embedding. The present invention may be analyzed stego capacity and image size, the carrier frequency band, steganography operator, embedding relationships factors strength and image complexity, etc., and disclosed honor dense experimental protocol, experiment verified the steganographic volume relationship of these factors models correctness. Compared with other methods, the proposed method of the present invention is more theoretical value and practical engineering significance.