Title:
FILTERING METHOD AND APPARATUS, AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/042550
Kind Code:
A1
Abstract:
A filtering method and apparatus, and a device. The filtering method comprises: when it is determined that Wiener filtering is started for an adaptive correction filtering unit of the current image frame, deriving the adaptive correction filtering unit according to the currently largest coding unit (LCU) of the current image frame; obtaining a reference pixel of the adaptive correction filtering unit and a filtering coefficient of a Wiener filter; and performing Wiener filtering on the basis of a sample pixel of the adaptive correction filtering unit according to the obtained reference pixel and the obtained filtering coefficient of the Wiener filter; wherein the Wiener filter is a centrosymmetric filter in a shape of a 7*7 cross and a 5*5 square, and a value of the reference pixel is derived from a pixel value of a reconstructed image before filtering.
More Like This:
Inventors:
PAN DONGPING (CN)
SUN YUCHENG (CN)
CHEN FANGDONG (CN)
WANG LI (CN)
SUN YUCHENG (CN)
CHEN FANGDONG (CN)
WANG LI (CN)
Application Number:
PCT/CN2021/114311
Publication Date:
March 03, 2022
Filing Date:
August 24, 2021
Export Citation:
Assignee:
HANGZHOU HIKVISION DIGITAL TEC (CN)
International Classes:
H04N19/80; H04N19/117
Domestic Patent References:
| WO2018170801A1 | 2018-09-27 |
Foreign References:
| CN104702963A | 2015-06-10 | |||
| CN104639948A | 2015-05-20 | |||
| CN105357538A | 2016-02-24 | |||
| CN104683819A | 2015-06-03 |
Attorney, Agent or Firm:
BEIJING BESTIPR INTELLECTUAL PROPERTY LAW CORPORATION (CN)
Download PDF:
Previous Patent: TEDIZOLID PHOSPHATE INTERMEDIATE AND PREPARATION METHOD THEREFOR
Next Patent: DIGITAL PRINTED BLANKET PRODUCTION METHOD
Next Patent: DIGITAL PRINTED BLANKET PRODUCTION METHOD