MEDICAL IMAGE PRIVACY PROTECTION METHOD BASED ON CIPHERTEXT IMAGE RESTORATION

WIPO Patent Application WO/2023/092342

A1

Disclosed in the present invention is a medical image privacy protection method based on ciphertext image restoration. The method comprises: generating a mask image by means of a medical image, and forming an image to be restored, a texture image, a JL transformation encryption result image and an encrypted medical image; performing block division on the encrypted medical image on the basis of the texture image to obtain a plurality of image blocks; determining, on the basis of the mask image and the texture image, a limited source region of a block to be restored in each image block; and determining an optimal patch set in the limited source region on the basis of the JL transformation encryption result image; connecting adjacent patches in the optimal patch set to obtain an optimal patch set after connection; and on the basis of the optimal patch set after connection and a binary bit stream, generating an encrypted image carrying embedded information. The present invention solves the problems that an existing medical image privacy protection method is not high in security and an existing ciphertext image restoration technique cannot be applied to image privacy protection due to a poor restoration effect.

KONG PING (CN)
WU TAO (CN)
LI AN (CN)
ZHOU LIANG (CN)
ZHOU YANLI (CN)
ZHANG JIANQING (CN)
CHEN LIFAN (CN)
WANG HONGJIE (CN)

PCT/CN2021/132861

June 01, 2023

November 24, 2021

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SHANGHAI HEALTH MEDICAL COLLEGE (CN)

G06T5/00; G06T7/41; G16H30/20

CN108846816A	2018-11-20
CN110659511A	2020-01-07
US20160182920A1	2016-06-23

BEIJING GAOWO LAW FIRM (CN)

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