Automatic follow focus device based on video target tracking

A target tracking and video technology, used in color TV parts, TV system parts, TVs, etc., can solve the problems of inability to use zoom lenses, inability to use the focal length of the lens, and the inaccuracy of the rangefinder to follow the target. Simple to use effects

Active Publication Date: 2015-08-05
MOVCAM TECH
View PDF5 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the existing technology, there are devices that use ranging sensors and video target tracking to perform automatic focusing, but manual calibration of the camera's field of view is required, and the camera's field of view cannot be calculated using the focal length of the lens, so it cannot be applied to zoom lenses , causing the rangefinder to follow the target inaccurately
Generally sp

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Automatic follow focus device based on video target tracking
  • Automatic follow focus device based on video target tracking
  • Automatic follow focus device based on video target tracking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] Embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals represent like elements. As mentioned above, such as Figure 1-3 As shown, the present invention provides an automatic focus device 100 based on video target tracking, including:

[0037] PTZ 2 that can rotate around the horizontal direction and vertical direction;

[0038] A pan-tilt motor 3 for driving the pan-tilt 2 to rotate around the horizontal direction and the vertical direction, the pan-tilt motor 3 is generally a stepping motor or a servo motor;

[0039] The ranging sensor 1 for measuring the distance of a moving target in real time, the ranging sensor 1 is installed on the cloud platform 2; the ranging sensor 1 refers to a laser ranging sensor or an ultrasonic ranging sensor, especially a measurement frequency High-speed rangefinders with a measurement error of 5cm or less at 50Hz and above;

[0040] A pan-tilt motor driver 4 for driv...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention discloses an automatic follow focus device based on video target tracking, which comprises: a cradle head, a cradle head motor, a cradle head motor driver, a distance measuring sensor used for measuring the distance from a movable target in real time and installed on the cradle head, a video collecting card used for receiving a video signal of a camera and outputting the video signal to a video terminal, the video terminal provided with video target tracking software in advance and used for receiving the video signal of the video collecting card and outputting coordinate values of a followed target relative to an image, a first lens motor and a second lens motor used for driving a focusing ring and a zooming ring of a lens, a lens motor driver used for driving the first lens motor and the second lens motor, and a main controller used for receiving a target distance value outputted by the distance measuring sensor and target coordinate values outputted by the video terminal and controlling the cradle head motor driver and the lens motor driver. The automatic follow focus device of the present invention has the advantages of automatic computation of field angles of the camera, no need of calibration and simple operation.

Description

technical field [0001] The invention relates to the field of radio, television and film equipment, in particular to an automatic focus device based on video target tracking. Background technique [0002] In the existing technology, there are devices that use distance measuring sensors and video target tracking for automatic focusing, but manual calibration of the camera's field of view is required, and the focal length of the lens cannot be used to calculate the camera's field of view, so it cannot be applied to zoom lenses , causing the rangefinder to follow the target inaccurately. Generally speaking, there is a certain position deviation between the installation position of the gimbal and the optical axis of the camera in the horizontal or vertical direction, and the existing automatic focus based on video target tracking cannot automatically correct the level according to the vertical distance between the target and the focal plane. Or the positional deviation in the ve...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04N5/232
Inventor 徐红兵何景川
Owner MOVCAM TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap