Research On Key Technologies Of Secret Image Sharing Based On AMBTC

AMBTC(Absolute Moment Block Truncation Coding)compression has the advantages of fast coding and low implementation cost.It has been widely used in edge computing,aerospace and other fields.As an image security protection technology,secret image sharing can be applied in these fields to ensure the security of AMBTC compressed images.This paper gives the related concepts of secret image sharing and AMBTC compression,then discusses the research status of secret image sharing based on AMBTC compression,and analyzes the advantages and disadvantages of the current research schemes.Aiming at solving the problems of complex implementation algorithm,pixel expansion,low quality of decrypted and stego images,meaningless shadow images in the current research,the following three secret image sharing schemes based on AMBTC compression are proposed:1.A meaningful visual secret sharing scheme for AMBTC images is proposed.The scheme is designed and realized to take into account the quality of recovered image and stego images,and reducing the change of cover images’ bitmaps as much as possible.The proposed scheme has the advantages of no pixel expansion,intelligi- bility of stego images,high quality of recovered image and stego images.2.A meaningful polynomial secret sharing for AMBTC images is proposed.Polyno-mial secret sharing can almost lossless recover the secret image,eliminate the pixel expansion and ensure the security of the scheme,while the use of random elements utilization model based on quantization levels ensures the comprehensibility of the stego images.3.A polynomial secret sharing scheme for AMBTC images based on total chromatic-ity optimization is proposed.Based on the meaningful polynomial secret sharingfor AMBTC images,the scheme is proposed to modify the bitmaps of the stego im-ages according to the total chromaticity adjustment algorithm,so that the change of the quantization levels during sharing process has less impact on the cover images,and the problem of low quality of the stego images is solved.