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1. CN109712193 - A method and a device for determining a field angle of a dome camera

Office Chine
Numéro de la demande 201811476158.0
Date de la demande 04.12.2018
Numéro de publication 109712193
Date de publication 03.05.2019
Type de publication A
CIB
G06T 7/80
GPHYSIQUE
06CALCUL; COMPTAGE
TTRAITEMENT OU GÉNÉRATION DE DONNÉES D'IMAGE, EN GÉNÉRAL
7Analyse d'image
80Analyse des images capturées pour déterminer les paramètres de caméra intrinsèques ou extrinsèques, c. à d. étalonnage de caméra
H04N 5/232
HÉLECTRICITÉ
04TECHNIQUE DE LA COMMUNICATION ÉLECTRIQUE
NTRANSMISSION D'IMAGES, p.ex. TÉLÉVISION
5Détails des systèmes de télévision
222Circuits de studio; Dispositifs de studio; Equipements de studio
225Caméras de télévision
232Dispositifs pour la commande des caméras de télévision, p.ex. commande à distance
CPC
G06T 7/80
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7Image analysis
80Analysis of captured images to determine intrinsic or extrinsic camera parameters, i.e. camera calibration
H04N 5/232
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
222Studio circuitry; Studio devices; Studio equipment ; ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, TV cameras, video cameras, camcorders, webcams, camera modules for embedding in other devices, e.g. mobile phones, computers or vehicles
225Television cameras ; ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, camcorders, webcams, camera modules specially adapted for being embedded in other devices, e.g. mobile phones, computers or vehicles
232Devices for controlling television cameras, e.g. remote control ; ; Control of cameras comprising an electronic image sensor;
Déposants ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
浙江大华技术股份有限公司
Inventeurs MENG CHENGZHE
蒙诚哲
PAN HUADONG
潘华东
Mandataires 北京同达信恒知识产权代理有限公司 11291
Titre
(EN) A method and a device for determining a field angle of a dome camera
(ZH) 一种球机视场角的确定方法及装置
Abrégé
(EN)
The invention relates to the technical field of image processing, and discloses a method and a device for determining a field angle of a dome camera, which are used for realizing automatic determination of the field angle of the dome camera, reducing the labor cost, and being simple in realization process, high in efficiency and suitable for large-area popularization. The method comprises the steps that a first image shot by a dome camera and a second image shot after the dome camera rotates by a preset angle are obtained, and when the dome camera shoots the first image and the second image, the T coordinate or the P coordinate of the dome camera is unchanged; obtaining the value range of the field angle of the dome camera, counting the matching error between the overlapped pixel points ofthe first image and the second image under different field angles in the value range, and obtaining the target field angle of the dome camera according to the field angle corresponding to the matching error with the minimum value.

(ZH)
本发明涉及图像处理技术领域,公开了一种球机视场角的确定方法及装置,用于实现球机视场角的自动化确定,不仅降低了人力成本,且实现过程简洁效率高,适合大面积推广。所述方法包括:获得球机拍摄的第一图像以及旋转预设角度后拍摄的第二图像,其中,球机拍摄第一图像和第二图像时,球机的T坐标不变或P坐标不变;获取球机的视场角取值范围,统计该取值范围内的不同视场角下第一图像与第二图像重合像素点之间的匹配误差,并根据值最小的匹配误差对应的视场角,获得所述球机的目标视场角。

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