Non-contact type human body height measuring method based on optical imaging

A non-contact technology of human body height measurement, which is applied in the field of human body height measurement, can solve the problems of difficult flexible application, inflexibility, and large limitations, and achieve the effect of high concealment, fast speed, and flexible measurement

Active Publication Date: 2014-08-27
武汉世纪金桥安全技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the above-mentioned human body height measurement methods all need to place the measuring device directly above the head of the person to measure, which belongs to contact measurement, which has relatively large limitations and is not flexible enough, especially for some mobile crowds. It is difficult to flexibly apply the traditional measurement method

Method used

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  • Non-contact type human body height measuring method based on optical imaging
  • Non-contact type human body height measuring method based on optical imaging
  • Non-contact type human body height measuring method based on optical imaging

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Embodiment 1

[0041] In some application occasions, it is necessary to take a relatively clear image of the human body face, the optical lens 1 is installed at a position corresponding to the upper body of the human body 8, and the photosensitive surface 2 can receive the image of the upper body of the human body including the entire head. see image 3 As shown, in this embodiment, the central axis of the optical lens 1 is placed along the horizontal direction, and the optical lens 1 and the ultrasonic probe 4 are located in the same vertical plane. In this case, a reference object 9 must be introduced, and the position of the reference object 9 and its image on the imaging surface shall be calibrated once during the production process of the non-contact measuring device. During normal use, only measurement The actual height of the human body 8 can be obtained by calculating the distance between the top of the head of the image of the human body 8 and the image of the reference object 9 . ...

Embodiment 2

[0052] In practical applications, in some occasions, the optical lens is installed higher than the top of the human head, and the axis of the optical lens 1 cannot be placed along the horizontal direction, but placed at a certain angle with the horizontal plane, see Figure 6 As shown, the center points of the ultrasonic probe 4 and the optical lens 1 may or may not be located in the same vertical plane. When the center point of the ultrasonic probe 4 and the optical lens 1 are not in the same vertical plane, the offset needs to be measured during the calibration process, and the offset is used when the central processor 6 reads the data of the ultrasonic probe 4 Just make corrections.

[0053] If the center point of the ultrasonic probe and the optical lens are not in the same vertical plane, it is necessary to calculate the distance u from the human body to the optical lens and the distance u from the reference object to the optical lens 1 Correction: When the ultrasonic wa...

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Abstract

The invention discloses a non-contact type human body height measuring method based on optical imaging and relates to the field of human body height measurement. The method comprises the following steps that a light sensing surface carries out photoelectric conversion on images of the human body or a reference substance formed through an optical lens, then, the analog-to-digital conversion is carried out, the obtained digital signals are transmitted to a central processor to be calculated, the central processor reads the distance between the human body and the optical lens measured by a distance measuring instrument, in addition, the distance from the top point of the human body image to the top point of the reference substance is analyzed and calculated in the collected image, and the actual body height of the human body is calculated through being combined with parameters obtained in the calibration process. The image of the measured people is obtained through the non-contact optical lens and is compared with the preset reference substance image to obtain the distance difference between the two images, the body height of the measured people can be obtained through a series of arithmetical operation, the non-contact measurement mode is flexible, and the speed is higher.

Description

technical field [0001] The invention relates to the field of human body height measurement, in particular to a non-contact human body height measurement method based on optical imaging. Background technique [0002] Human body height is an important indicator of human body shape characteristics. Males are generally between 20 and 24 years old, and females are generally between 19 and 23 years old. The long bones of the limbs and the spine have been ossified, and the height stops growing and is basically stable. down. In some specific applications, for example, in criminal investigation, human body height plays a significant role in describing a person's body shape. [0003] At present, there are many ways to measure human body height. The most direct measurement method is to use a ruler to measure human body height, but this measurement method is not very convenient, and requires manual operation and reading data. An improved method of measuring height is to add a moving c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/107
Inventor 蒋晖曹锋游晓光钱银博胡建
Owner 武汉世纪金桥安全技术有限公司
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