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Patent Searching and Data


Title:
IMAGE ENHANCEMENT METHOD AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/091270
Kind Code:
A1
Abstract:
Provided are an image enhancement method and system. The method comprises: acquiring an input brightness value, and calculating a logarithmic mean value of the input brightness value; processing the input image based on a Retinex image enhancement algorithm to obtain a first brightness gain value; according to the logarithmic mean value of the input brightness value, making a calculation to obtain a brightness gain control factor; according to the brightness gain control factor and the first brightness gain value, making a calculation to obtain a second brightness gain value; and enhancing the input image according to the second brightness gain value to obtain an output image. In the present application, a Retinex image enhancement algorithm is used to enhance an input image; and by using a brightness gain control factor, when the brightness of an image is low, a first brightness gain value will be largely compressed, and when the brightness of the image is high, the first brightness gain value is less compressed, so that the brightness gain of a dark image is lessened. The brightness of an output image is effectively controlled, so that the brightness of the output image can not only be raised, but also can satisfy a real environment.

Inventors:
MENG GUOQING (CN)
TANG FENGFENG (CN)
ZHANG YONG (CN)
CAO LIJUN (CN)
CHEN WEIDONG (CN)
Application Number:
PCT/CN2018/110702
Publication Date:
May 16, 2019
Filing Date:
October 17, 2018
Export Citation:
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Assignee:
SUZHOU KEDA TECHNOLOGY CO LTD (CN)
International Classes:
G06T5/00
Foreign References:
CN107730475A2018-02-23
CN102509272A2012-06-20
CN102789635A2012-11-21
US20090074317A12009-03-19
Attorney, Agent or Firm:
SUNSHINE INTELLECTUAL PROPERTY INTERNATIONAL CO., LTD (CN)
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