Title:
METHOD AND APPARATUS FOR CORRECTING IMAGE DISTORTION OF WIDE-ANGLE LENS, AND PHOTOGRAPHING DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/070862
Kind Code:
A1
Abstract:
A method and apparatus for correcting image distortion of a wide-angle lens, and a photographing device. The method comprises: inputting an original distorted image and a preset first calibration image (S1); determining a second calibration image according to the original distorted image and the first calibration image (S2); calculating, according to distortion parameters of the first calibration image and a distortion mathematical model, distorted image coordinates corresponding to the second calibration image (S3); determining difference parameters of the second calibration image, and correcting the distorted image coordinates according to the difference parameters (S4); and outputting a corrected image according to pixel values corresponding to the corrected distorted image coordinates (S5). According to the method, there is no need to calibrate a plurality of sets of distortion parameters, and correction of an original wide-angle distorted image of any resolution can be achieved only by calculating one set of distortion parameters corresponding to an image having the maximum resolution, thereby greatly simplifying the correction process, simultaneously avoiding the situation that calibrated distortion parameters have a large error when a small-resolution image is used for calibration, and thus improving correction accuracy.
Inventors:
WANG HUI (CN)
Application Number:
PCT/CN2021/137562
Publication Date:
May 04, 2023
Filing Date:
December 13, 2021
Export Citation:
Assignee:
SHANGHAI WINGTECH INFORMATION TECH CO LTD (CN)
International Classes:
G06T5/00
Foreign References:
| CN109961401A | 2019-07-02 | |||
| CN110264426A | 2019-09-20 | |||
| CN112258418A | 2021-01-22 | |||
| CN109671028A | 2019-04-23 | |||
| CN111951193A | 2020-11-17 | |||
| EP1096777A1 | 2001-05-02 |
Attorney, Agent or Firm:
BEIJING MIZAR STAR INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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