Human body height measuring method and system

Abstract

The invention discloses a human body height measurement method and system, and the method comprises the steps: obtaining a depth image and a color image of a measured person standing on the ground, detecting the color image based on a face detection algorithm, and obtaining the position coordinates of a face center; and determining depth image coordinates of the head top of the measured person inthe depth image based on the depth data and the position coordinates of the face center, converting the depth image coordinates into a camera coordinate system to obtain head top coordinates of the measured person in the camera coordinate system, and inputting the head top coordinates of the measured person into a point-to-plane distance equation to obtain the height of the measured person. Through the scheme, the height of the measured person can be measured without contacting any equipment, so that the height measuring efficiency is improved. Besides, the distance between the coordinate of the head top under the camera coordinate system and the ground plane equation is calculated to serve as the height of the measured human body, the human body contour does not need to be extracted fromthe ground and the human body contour in the depth image through segmentation, and therefore the height measurement error of the measured person is reduced.

Description

technical field [0001] The invention relates to the technical field of computer vision, and more specifically, to a method and system for measuring human body height. Background technique [0002] Currently, human body height measurement is usually performed using traditional physical equipment or a depth camera. [0003] The height measurement using traditional physical equipment is as follows: use a meter ruler to measure the height of the person's head from the ground to measure the height of the human body; the human body stands on the platform of the height measuring instrument, and uses a slide rule to snap to the top of the person's head to calculate the height from the top of the head to the sole of the foot Use the distance to measure the height of the human body; use infrared height measuring instruments to measure the height of the human body. [0004] The height measurement using the depth camera is as follows: obtain the depth image of the scene through the dep...

AI Technical Summary

Problems solved by technology

[0005] In the existing human height measurement, when using traditional physical equipment to measure the height of the human body, it is necessary to touch the physical equipment every time to measure the height, resulting in low efficiency of height measurement

When using a depth camera to measure the height of a human body, since the human body is standing on the ground, it is difficult to separate the ground in the depth image from the outline of the human body, so the extracted human body target will have errors, making the calculation of the position of the center of the human body's feet There will also be errors, resulting in a large error in the calculated height of the human body

[0006] Therefore, the efficiency of the existing human body height measurement is low and the error is large

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