Title:
A CAMERA CALIBRATION METHOD
Document Type and Number:
WIPO Patent Application WO/2023/035296
Kind Code:
A1
Abstract:
Described is a method of calibrating a camera. The method comprises defining an area observed in a field of view (FOV) of the camera as a region of interest (ROI). The method includes selecting a plurality of physical reference points in said ROI and obtaining for each reference point physical position coordinates. The method also includes obtaining from said camera FOV or camera image data pixel locations for each point of reference and pairing each pixel location with the physical position coordinates of its respective reference point. Then, a relationship is derived from the paired pixel locations and physical position coordinates to enable a selected or identified pixel location in the camera FOV or camera image data to be transformed to physical position coordinates for a corresponding physical location in said ROI.
Inventors:
LIANG YAOCHENG (CN)
CHENG HO MAN (CN)
MUI KA HO (CN)
CHENG HO MAN (CN)
MUI KA HO (CN)
Application Number:
PCT/CN2021/118432
Publication Date:
March 16, 2023
Filing Date:
September 15, 2021
Export Citation:
Assignee:
HONG KONG APPLIED SCIENCE & TECH RESEARCH INST CO LTD (CN)
International Classes:
G06T7/80; G06V10/25
Foreign References:
| CN111046762A | 2020-04-21 | |||
| CN104081433A | 2014-10-01 | |||
| CN112116655A | 2020-12-22 | |||
| CN112446898A | 2021-03-05 | |||
| CN104809718A | 2015-07-29 | |||
| CN108761475A | 2018-11-06 | |||
| US20210158567A1 | 2021-05-27 |
Attorney, Agent or Firm:
CHINA TRUER IP (CN)
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