Camera automatic variable-time control method based on human eye space

A control method and eye-to-eye distance technology, which can be applied to the components of cameras, image communications, and color TVs, etc., can solve the problems of complicated circuit and structural design, increase circuit hardware and structural costs, etc., achieve simple hardware structure, and avoid subsidiary manipulation. Effects of equipment and manual controls

Inactive Publication Date: 2015-04-08
TIANJIN YAAN TECH CO LTD
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Problems solved by technology

To obtain distance information, many monitoring devices add laser ranging or ultrasonic ranging modules. If this module wil

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  • Camera automatic variable-time control method based on human eye space
  • Camera automatic variable-time control method based on human eye space
  • Camera automatic variable-time control method based on human eye space

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[0016] In order to enable those skilled in the art to better understand the purpose, technical solutions and advantages of this technical patent, the technical patent will be further described below in conjunction with the accompanying drawings and embodiments of specific application scenarios. The specific embodiments described here are only for explaining the technical patent, and cannot be used as the basis for limiting the technical patent.

[0017] Such as figure 1 — image 3 , the embodiment of the present invention adopts a zoom lens, an image sensor, and a video analysis and processing unit as the hardware configuration of the device.

[0018] The specific implementation examples are described in the following three scenarios or modes:

[0019] ① When a person enters the field of view from the front, first lock the two eyes in the video, measure the distance w between them, obtain the zoom factor and zoom parameters of the current camera, and obtain the corresponding...

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Abstract

The invention provides a camera automatic variable-time control method based on the human eye space. According to the method, a zoom lens and/or zoom driving motor or a prime lens, an image sensor and a video analysis processing unit are mainly used, the front side of a person enters a shooting view field, the two eyes in the video are locked, the space w of the two eyes is measured and calculated, at the moment, the lens focus f and the human eye general space W and the human eye space w in the video are known quantities, the values are substituted into a formula, the distance of an object to be shot can be calculated, the expected human face size is set in a monitoring image, the space between the two eyes in the image is wi, the space w of the two eyes in an actual image is measured and calculated, the ratio of the w to the wi is calculated, the zoom power of the lens is regulated according to a preset relational expression in accordance to the proportion relationship, so that the regulated w equals to the wi, the steps are repeated when the distance between the human face and the lens is changed, and the w is enabled to be equal to the wi, so that the human face can be enabled to be always displayed in the image in the preset size in a certain distance range.

Description

technical field [0001] The invention belongs to the field of video monitoring, and relates to an automatic zoom control method of a video camera based on the distance between human eyes. Background technique [0002] PTZ camera or dome camera is the most widely used monitoring front-end equipment in the field of video surveillance today. Its camera can control the rotation of the motor in the horizontal direction and vertical direction to drive the camera to rotate in different directions for video surveillance, and can adjust the zoom of the camera to observe targets or scenes within different distances, so that it can monitor a very large range . Among them, the zoom adjustment of the camera according to the distance between the moving target and the camera is a key technology that affects the video acquisition effect of the pan-tilt camera. The zoom adjustment of the existing pan-tilt camera includes manual zoom and automatic zoom, of which manual zoom After the monitor...

Claims

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Application Information

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IPC IPC(8): H04N5/232H04N7/18G02B7/28G03B13/36
Inventor 曾骥刘方
Owner TIANJIN YAAN TECH CO LTD
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