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A distance measuring method for a variable magnification ball camera movement

A distance measurement method and movement technology, which can be used in the measurement distance, measurement device, line of sight measurement and other directions, which can solve the problems of unrealistic, high cost and strict installation requirements.

Active Publication Date: 2015-11-25
GOSUNCN TECH GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the solutions in the prior art either need to cooperate with lasers, radar transmitters or multiple cameras for parallax calculation. The installation requirements are strict and the cost is high. Moreover, it is unrealistic to install the above-mentioned equipment in the current video surveillance dome camera.

Method used

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  • A distance measuring method for a variable magnification ball camera movement
  • A distance measuring method for a variable magnification ball camera movement

Examples

Experimental program
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Embodiment

[0031] Embodiment: Taking the Sony FCB-CH6300 movement as an example, its optical zoom range is 0~16384 (1~20 times), the focus value range is 4096~61440, and the distances of objects are different. The obtained data is as follows: figure 2 .

[0032] In order to minimize the influence of the zoom value on the focus value-object distance, to obtain the above data, it is necessary to limit the zoom value, because when the object is close, if the zoom is large, the movement may not be in focus . Try to make the zoom value as large as possible, and the object can automatically focus clearly, with the following restrictions:

[0033] When the distance between the object and the movement is less than or equal to 40cm, the zoom value must be less than 10752;

[0034] When the distance between the object and the movement is greater than 40cm and less than or equal to 90cm, the zoom value must be greater than or equal to 1280 and less than or equal to 12288;

[0035] When the dist...

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Abstract

The invention provides a range measuring method for a machine core of a power-variable ball machine. The range measuring method comprises the following steps: S11, selecting a machine core of a ball machine and carrying out pre-treatment before range measurement on a focusing value and a power-variable range of the machine core to generate a distance checking table; S12, after the pre-treatment, selecting an object needing to be subjected to the range measurement and adjusting the machine core to focus clearly so as to obtain a current focusing value and a current power-variable value; S13, judging whether the current focusing value is reasonable or not and judging whether the current focusing value meets the limitation of the power-variable range or not; if so, calculating the distance of the object by relative parameters in the distance checking table; if not, readjusting the power-variable value and measuring again; and S14, calculating the distance of the object and displaying. According to the range measuring method, extra measurement equipment does not need to be additionally arranged and the measurement cost is low.

Description

technical field [0001] The invention relates to a camera movement video distance measurement, in particular to a distance measurement method for a variable magnification ball camera movement. Background technique [0002] There are many ranging techniques at present, mainly the following three ranging methods: [0003] 1. Laser distance measurement: The laser pulse is emitted by the laser transmitter, and the time difference between the emission and reception is calculated through the received laser pulse, because the speed of light is known, and the distance of the object can be calculated; [0004] 2. Radar ranging: transmit pulse waves through radar, similar to the method of laser ranging, and measure the distance according to the time difference between sending and receiving; or transmit frequency-modulated continuous waves, and calculate the frequency difference between the received wave and the transmitted wave distance; [0005] 3. Visual distance measurement: Gener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C3/00
CPCG01C3/00
Inventor 罗中亮俞翔罗泽彬吴仲谋李欢
Owner GOSUNCN TECH GRP