Secure image transmission method based on fountain code and self-adaptive resource distribution

Abstract

The invention discloses a secure image transmission method based on a fountain code and self-adaptive resource distribution. The invention aims at specifically ensuring the security of a region-of-interest in a medical image under delay constraint. Firstly, the image is subjected to region segmentation to extract the region-of-interest (ROI) and a background region (BG), thus two kinds of original data packages ROI and BG are obtained. Secondly, the type of the data package to be transmitted is selected according to the channel quality of a legal link and the receiving state identifiers of the two kinds of data packages. Then the self-adaptive resource distribution is performed according to the channel quality of the legal link, thus a legal receiving end achieves higher data package correct receiving rate. At last, the RS fountain code is performed on the original data package to be transmitted. In order to compensate relatively high time delay due to the fact that the BG package is transmitted when the channel quality is poor, the two kinds of packages are simultaneously transmitted in a superimposed coding manner when the channel quality is especially good. By simulation verifying, the secure image transmission method can well achieve key protection on the ROI in the image.

Description

Technical field: [0001] The present invention relates to a mechanism for ensuring image security in a wireless multimedia image transmission system, in particular to an image security transmission method based on fountain code and adaptive resource allocation, which uses fountain code technology and adaptive resource allocation to reduce image wireless The security violation probability and transmission delay in the transmission process realize the key protection of the area of ​​interest in the image. Background technique: [0002] With the rapid development of wireless communication, the wireless transmission of static multimedia images is becoming more and more frequent. However, due to the openness of the wireless environment itself, image transmission is also facing severe security issues. Traditional wireless image transmission uses key-based encryption technology and digital watermarking technology to ensure security. The core of encryption technology is to continuou...

AI Technical Summary

Problems solved by technology

However, due to the openness of the wireless environment itself, image transmission is also facing severe security issues.

Traditional wireless image transmission uses key-based encryption technology and digital watermarking technology to ensure security. The core of encryption technology is to continuously increase the complexity of decryption, but the performance of computers is improving rapidly. The security of this encryption technology has also been greatly challenged

Moreover, the security of key distribution and exchange is difficult to guarantee

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