WO2025046553 - METHOD FOR LEN DISTORTION CALIBRATION AND CALIBRATED SYSTEM THEREFROM
National phase entry is expected:
Publication Number
WO/2025/046553
Publication Date
06.03.2025
International Application No.
PCT/IB2024/058533
International Filing Date
03.09.2024
Title **
[English]
METHOD FOR LEN DISTORTION CALIBRATION AND CALIBRATED SYSTEM THEREFROM
[French]
PROCÉDÉ D'ÉTALONNAGE DE DISTORSION DE L'OBJECTIF ET SYSTÈME ÉTALONNÉ À PARTIR DE CELUI-CI
Applicants **
MULTI-SCALE MEDICAL ROBOTICS CENTER LIMITED
Inventors
MA, Xin
ZHU, Puchen
WANG, Xuchen
AU, Kwok Wai Samuel
Priority Data
63/536,431
03.09.2023
US
Application details
| Total Number of Claims/PCT | * |
| Number of Independent Claims | * |
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| Number of Multi-Dependent Claims | * |
| Number of Drawings | * |
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International Searching Authority |
CNIPA
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| Recordal of a Change of the Applicant's Name/Address |
Change of Applicant's Name and Address
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| Type of Assignment |
The Standard Agent's Assignment
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| Applicant's Legal Status |
Legal Entity
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| Entry into National Phase under |
Chapter I
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| Patent Delivery |
Send the Letters Patent by Courier
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| Translation |
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Quotation for National Phase entry
| Country | Stages | Total | |
|---|---|---|---|
| China | Filing, Examination, Granting | 1719 | |
| EPO | Filing, Examination, Granting | 11600 | |
| Japan | Filing, Examination, Granting | 2181 | |
| South Korea | Filing, Examination, Granting | 2107 | |
| USA | Filing, Examination, Granting | 5940 |
Total:
23,547
The term for entry into the National Phase has expired. This quotation is for informational purposes only
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Abstract[English]
This invention provides a method for lens distortion calibration of a stereo vision system comprising a left camera and a right camera. In one embodiment, said method comprises the steps of: a) Acquiring images of corner points using said stereo vision system, wherein said corner points are formed by intersection of m horizontal lines and n vertical lines arranged on a plane; and actual distance between adjacent comer points is precisely known; b) Extracting image coordinates of said corner points from said set of images and calculating a set of intrinsic, extrinsic and distortion parameters of said left camera and said right camera through homography matrix; c) Obtaining a set of corrected image coordinates (I) and (II) using said set of intrinsic, extrinsic and distortion parameters of step (b) and a lens distortion model.[French]
La présente invention concerne un procédé d'étalonnage de distorsion de l'objectif d'un système de vision stéréo comprenant une caméra gauche et une caméra droite. Dans un mode de réalisation, ledit procédé comprend les étapes consistant à : a) acquérir des images de points de coin à l'aide dudit système de vision stéréo, lesdits points de coin étant formés par intersection de m lignes horizontales et n lignes verticales disposées sur un plan ; b) extraire des coordonnées d'image desdits points de coin dudit ensemble d'images et calculer un ensemble de paramètres intrinsèques, extrinsèques et de distorsion de ladite caméra gauche et de ladite caméra droite par l'intermédiaire d'une matrice d'homographie ; c) obtenir un ensemble de coordonnées d'image corrigées (I) et (II) à l'aide dudit ensemble de paramètres intrinsèques, extrinsèques et de distorsion de l'étape (b) et d'un modèle de distorsion d'objectif.