Title:
IMAGE ENCRYPTION AND CORRECTION METHOD AND DEVICE, AND IMAGE DECRYPTION METHOD AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/114308
Kind Code:
A1
Abstract:
The present invention relates to the technical field of image processing, and provides an image encryption and correction method and device, and an image decryption method and device. The method comprises: performing normalization processing on brightness pixels to generate a first pixel brightness value; randomly generating first random data on the basis of an encryption key, and generating an encrypted second pixel brightness value on the basis of the first random data and the first pixel brightness value; and performing gamma correction on the second pixel brightness value on the basis of a first gamma correction parameter to obtain a third pixel brightness value. The generating of the encrypted second pixel brightness value on the basis of the first random data and the first pixel brightness value comprises: performing logarithmic operation on a product of the first random data and the first pixel brightness value so as to generate the encrypted second pixel brightness value. By means of the present solution, gamma correction processing can be performed on encrypted image data, thereby improving the image quality while protecting the privacy of an image of a user side, and ensuring safety of user data.
Inventors:
YANG JIANQUAN (CN)
HUANG QIAN (CN)
ZHANG YULAN (CN)
CHANG JIE (CN)
ZHU GUOPU (CN)
HUANG QIAN (CN)
ZHANG YULAN (CN)
CHANG JIE (CN)
ZHU GUOPU (CN)
Application Number:
PCT/CN2019/121557
Publication Date:
June 11, 2020
Filing Date:
November 28, 2019
Export Citation:
Assignee:
SHENZHEN INST OF ADV TECH CAS (CN)
International Classes:
H04N1/32
Foreign References:
| CN105830134A | 2016-08-03 | |||
| CN105814874A | 2016-07-27 | |||
| CN105900421A | 2016-08-24 | |||
| CN1450495A | 2003-10-22 | |||
| US20160000301A1 | 2016-01-07 |
Attorney, Agent or Firm:
BEIJING CHENGHUI LAW FIRM (CN)
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