US 11,638,071 B2Granted

Camera assembly and monitoring camera

AssigneeHangzhou Hikvision Digital Technology Co., Ltd.

InventorsQi Gong, Weimin Ma

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Abstract

The present application provides a camera assembly, which comprises a panoramic camera, a PTZ camera, and a processor. The panoramic camera is used to collect wide-angle images of a monitoring scene; the PTZ camera is used to collect narrow-angle images in different directions of the monitoring scene; the processor is configured to superimpose, in response to an instruction input from outside, a polygon frame corresponding to the instruction on the wide-angle image; select, according to a preset mapping table of wide-angle image coordinates and narrow-angle image coordinates, at least two ordinate values on the polygon frame in the wide-angle image, to obtain at least two ordinate values on the narrow-angle image, thereby determining an effective focus value interval of the PTZ camera, so that the PTZ camera performs a focusing operation within the effective focus value interval during a focusing process.

Claims16

Dependent claims

A method for focusing and displaying a region of interest located in a wide-angle image, the method comprises:

obtaining at least 4 pixel points set by a user in a wide-angle image, and the at least 4 pixel points are used to indicate a region of interest of the user in the wide-angle image;
obtaining an ordinate value of each of the at least four pixel points;
grouping, according to the ordinate value of each pixel point, the at least four pixel points into groups each containing two pixel points;
obtaining an abscissa mean and an ordinate mean of two pixel points in any group;
applying a weighting function to the abscissa means and the ordinate means of respective groups to calculate one weighted abscissa value and one weighted ordinate value;
based on a preset coordinate mapping function between a wide-angle image and a Pan-Tilt (PT) camera picture, determining and displaying in the PT camera picture, all pixel points obtained by applying the coordinate mapping function to a pixel point corresponding to the abscissa mean and the ordinate mean of any group and a pixel point corresponding to the weighted abscissa value and the weighted ordinate value;
driving a motor in a Pan-Tilt (PT) camera used to collect the PT camera picture to move, based on all the determined pixel points and a preset Pan-Tilt (PT) mapping function between the PT camera picture and the motor, so that the region of interest in the wide-angle image is focused and displayed in a newly collected PT camera picture.

4 more elements

A camera assembly, comprising:

a panoramic camera, comprising a first lens and a first image sensor, the panoramic camera is used to collect wide-angle images of a monitoring scene;
a Pan, Tilt, Zoom (PTZ) camera, comprising a Pan-Tilt (PT) pan-tilt, a second lens, and a second image sensor, the second lens is a zoom lens, the PTZ camera is used to collect narrow-angle images in different directions of the monitoring scene, a visual field angle range of the wide-angle image is larger than a visual field angle range of the narrow-angle image;
a processor, configured to:
superimpose, in response to an instruction input from outside, a polygon frame corresponding to the instruction on the wide-angle image;
select, according to a preset mapping table of wide-angle image coordinates and narrow-angle image coordinates, at least two ordinate values in the polygon frame in the wide-angle image, and calculate at least two ordinate values on the narrow-angle image corresponding to the at least two ordinate values in the polygon frame in the wide-angle image;
calculate an effective focus value interval of the PTZ camera based on the at least two ordinate values in the narrow-angle image, so that the PTZ camera performs a focusing operation within the effective focus value interval during a focusing process.

3 more elements

A monitoring camera, comprising a panoramic camera lens and a panoramic image sensor connected to each other, a Pan, Tilt, Zoom (PTZ) camera lens and a Pan, Tilt, Zoom (PTZ) image sensor connected to each other, and a processor connected to both the panoramic image sensor and the PTZ image sensor;

the panoramic image sensor is used to collect a wide-angle image through the panoramic camera lens;
the PTZ image sensor is used to collect a narrow-angle image through the PTZ camera lens;
the processor is configured to obtain the wide-angle image and the narrow angle image, and associate, according to an obtained label instruction, a panoramic focus label line segment in the wide- angle image to a same position in the narrow-angle image.

Dependencies are inferred from the claim text.

Facts

Application: 17/631,739Filed 14 Aug 2020
Priority: CN 201910746982.114 Aug 2019
Published: US 2022/0279131 A11 Sep 2022
Granted: 25 Apr 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

H04N 23/675
Focus control based on electronic image sensor signals: comprising setting of focusing regions
H04N 23/695
Control of cameras or camera modules: control of camera direction for changing a field of view, e.g. pan, tilt or based on tracking of objects
H04N 23/698
Control of cameras or camera modules: for achieving an enlarged field of view, e.g. panoramic image capture
H04N
Pictorial communication