CN1133402C - Method for measuring sizes of human body - Google Patents

Abstract

The present invention relates to a device for measuring human body sizes, which is provided with a measuring table, wherein the measuring table is provided with a mark plate; axisymmetric positions at both sides of the measuring table are provided with a video camera and a projector; the back of the video camera is provided with a black screen; the output end of the video camera is electrically connected with the input end of an image card which is arranged in a computer; the projector is provided with a mobile raster, and a stepping motor drives the raster by a threaded rod drive mechanism; a controller is connected with the computer by an interface module. The present invention can exactly measure the feature sizes and the three-dimensional surface states of human bodies.

Description

A kind of human body dimension measurement method

The present invention relates to a kind of human body dimension measurement method, this method utilizes projection and camera technique that the body dimension is carried out non-contact measurement.

Chinese patent CN108437A (human body three-dimensional structure data automatic measuring system) discloses a kind of contactless human body dimension measurement system, this technology is by video camera and infrared imagery technique, in conjunction with optical filtering technique the human body image pickup is preserved, utilize computer image processing that the human body true profile profile in the human body image is extracted, this technology is earlier by several body configuration's profiles of rotation picked-up, then several body configuration's profiles are carried out comprehensive computing, draw the three-dimensional data of reflection human body stereo architectural feature.But this system realizes that the rim detection of human body and background is very difficult, and system accuracy is poor, and reliability and stability are difficult to guarantee.

The object of the present invention is to provide a kind of human body dimension measurement method, use this method can be with the extremely short time, more accurately measure three-dimensional surface form as characteristics of human body's size such as chest measurement, waistline, shoulder breadth, height and human body.

The objective of the invention is to realize: use video camera by following technical proposals, projector and computer are as testing tool, set in advance the test desk of a level, on this test desk, set reference plane perpendicular to this test desk, and in the field range of these reference plane, set up a marking plate, with reference plane is the symmetrical centre plane, symmetric position in its two sides is provided with described video camera and projector, the place is provided with black screen in background, tested person's body is positioned at the reference plane place, the video camera of reference plane one side and the front of the tested human body of projector alignment, the back side of the video camera of reference plane opposite side and the tested human body of projector alignment, described projector uses the white light line source, a sinusoidal glass raster is housed on it, this grating is provided with start mark, the white light line sees through sinusoidal glass raster and forms structured light, projector projects the tested person surface with this structured light and forms the deformed grating map, described sinusoidal glass raster can be done equidistant stepping perpendicular to optical axis and move three phase places in a pitch, return initial phase then, in the process that grating moves, make the front and back of tested human body respectively produce four amplitude variation shape grating maps, take in this eight width of cloth map in the described computer synchronously continuously with described gamma camera, computer special-purpose software by establishment, deformed grating map to tested human body is carried out pretreatment, rim detection, image processing and phase calculation, obtain the three-dimensional coordinate data of tested person surface each point, and then calculate required anthropometric data and configuration of surface.

The present invention has following advantage:

What 1, this measuring method was obtained contains much information, a resulting frame human body phase diagram has comprised whole three-dimensional informations of human body, by date processing, not only can obtain the required characteristic size of dress designing, and as required, can obtain human body image any the three-dimensional coordinate of meaning of taking up an official post.

2, this measuring method can onlinely be measured by the man-machine conversation mode, also can realize the off-line data processing, saves the in-site measurement time.

The invention will be further described below in conjunction with drawings and Examples

Fig. 1, measuring system of the present invention are arranged sketch map

Fig. 2, projector architecture sketch map of the present invention

Fig. 3, screw drive mechanism sketch map

Fig. 4, screw drive mechanism right view (right view of Fig. 3)

Fig. 5, the grating location drawing in projector

Fig. 6, controller electrical principle block diagram

Fig. 7, controller electrical schematic diagram

Fig. 8, computer programme flow diagram

A kind of human body dimension measurement method, use video camera, projector and computer as testing tool, set in advance the test desk of a level, on this test desk, set reference plane perpendicular to this test desk, and in the field range of these reference plane, set up a marking plate, with reference plane is the symmetrical centre plane, this symmetrical centre plane overlaps with reference plane, symmetric position in its two sides is provided with described video camera and projector, 2.6 meters on this video camera and projector distance reference plane; In order from background, to extract human body target, make visual background clean, obtain image edge and detect needed human body image, also need black screen be set at the background place; Tested person's body is positioned at the reference plane place, the video camera of reference plane one side and the front of the tested human body of projector alignment, the back side of the video camera of reference plane opposite side and the tested human body of projector alignment, described projector uses the white light line source, a sinusoidal glass raster is housed on it, this grating is provided with start mark, the white light line sees through sinusoidal glass raster and forms structured light, projector projects the tested person surface with this structured light and forms the deformed grating map, described sinusoidal glass raster can be done equidistant stepping perpendicular to optical axis and move three phase places in a pitch, return initial phase then, in the process that grating moves, make the front and back of tested human body respectively produce four amplitude variation shape grating maps, with described video camera this eight width of cloth map is taken in the described computer synchronously continuously, adopted the grating fringe on the algorithm cancellation human body surface that four images additions average; Computer special-purpose software by establishment, deformed grating map to tested human body is carried out pretreatment, rim detection, image processing and phase calculation, obtain the three-dimensional coordinate data of tested person surface each point, and then calculate required anthropometric data and configuration of surface.Described rim detection is to adopt the orientation preferentially method to carry out the border to follow the tracks of, utilize the sobei operator to determine threshold value automatically, utilize eight neighborhood coding techniques to improve rim detection speed, and utilize the human figure feature to finish the data boundary conversion that human body image outer contour sorts left to right and writes down, finish the rim detection of human body image.When carrying out phase calculation, need reference plane by the symmetrical centre plane, move to the plane of gamma camera optical axis and tested person surface intersection point, as empty reference plane, and origin identification is set on grating, in the field range of reference plane, marking plate is set, modified computing formulae and then finish phase calculation.Revised computing formula is as follows

Height formula: $h(x,y)=\frac{k\left(\mathrm{\Φ}\right){Z^{\′}}_o-X[\cos \mathrm{\θ}-k\left(\mathrm{\Φ}\right)\sin \mathrm{\θ}]}{k\left(\mathrm{\Φ}\right)\cos \mathrm{\θ}+\sin \mathrm{\θ}}$

Z ' in the formula.＝(rh ²+d ²) ^1/2 $k\left(\mathrm{\φ}\right)=\frac{P_o\×\mathrm{\Φ}(x,y)}{256\×Z^{\′}}$

rh＝1-b $b=\frac{1\×t}{d+t}$ $t=\frac{\mathrm{\Φ}\left(256\right)-{\mathrm{\Φ}}_p\left(256\right)}{256}\×P_o$

Referring to Fig. 8, use that C language and assembler language establishment computer rim detection, image are cut apart, phase calculation and data processing software, obtain the distance of the needed degree of enclosing arbitrarily of human body surface, random length, any width and any point-to-point transmission, obtain needed size, and can satisfy make children body master pattern required form and size of the first day of the lunar month.The statistics of the correction of system, control, measurement and data is also all finished by microcomputer automatically.

Referring to Fig. 1, for realizing that the present invention need design a measuring system, a test desk 6 is arranged in this system, test desk is provided with marking plate 5, marking plate is marked with standing striation, carry out size when calculating as the reference benchmark, before the measurement, hang reference plane 4 on the test desk, these reference plane are only used at this measuring system verification timing signal, remove during to somatometry, and these reference plane can adopt a white curtain, timing signal is that benchmark makes the optical axis intersection of the optical axis of projector and video camera on this plane with the formed plane of reference plane.Be provided with two video cameras 1 and two projectors 3 in the position axisymmetricly, both sides of test desk, video camera is installed on the The Cloud Terrace of tripod 2, and projector is lifted on the tripod lower end, and the angle between projector and the tripod main shaft can be regulated easily.Video camera is provided with black screen 7 behind, its effect is that image is separated from background, being convenient to carry out image edge detects, video camera adopts the CCD B, image in the outfan of this video camera and the computer 9 blocks 12 inputs and is electrically connected, this image card adopts PIP image card, described projector adopts the common white radiant, referring to Fig. 2 and Fig. 5, its light path part is by spherical reflector 201, halogen tungsten filament 202, aspherical condenser 203, heat-protecting glass 204, spherical mirror 205, object lens 207 sequence arrangement are formed, on projector, be provided with a mobile grating 206, this grating is located at the position between spherical mirror and the object lens, this grating is driven by screw drive mechanism 301 by motor, referring to Fig. 3 and Fig. 4, a fixing head 313 is arranged in the described screw drive mechanism, this fixing head and projector are fixed, this fixing head is provided with motor cabinet 307, two screw bolt seats 308,309, motor 311 is housed on the motor cabinet, the drive screw 302 and the axis of guide 305 are housed on the screw bolt seat, drive screw is provided with transmission nut 303 and slide block 304, then 0.125 millimeter of the grating translation of 90 ° of motor revolutions, raster box 306 is housed on this slide block, grating 206 is housed in it, and described grating is to make equidistant striped by lithography on an eyeglass.There is a controller 8 to be connected with described computer by interface module 801, this computer disposes printer 10 and display 11, and this controller is made up of projection light source circuit 802, pulse display module 803, step motor drive module 804, power module 805.Referring to Fig. 6, Fig. 7; the left side outfan of the interface module in the controller is D2, D6; the right side outfan is D1, D7; control the device work of left and right sides respectively; D0 is the projection light source control end; the left and right side outfan is to be connected with computer data bus by computer parallel port; circuit adopts photoelectric isolating device 806; make the signal level of controller and computer isolated on the one hand; play the protection computer; carry out level conversion on the other hand, the Transistor-Transistor Logic level of computer is converted to the CMOS level that controller needs, the signal level of transmission is complementary.The step motor drive module is to produce pulse signal, drive stepping motor 311 is rotated, it is made up of impulse phase allotter 807 and power amplifier, in the impulse phase allotter, the CH250 chip is the working method with the two triple time wiring of three-phase, and promptly a trigger impulse makes 3 ° of motor rotations, sends under the different control informations at computer, this chip produces and makes control signals such as motor just changes, reverses, stops, and the power amplifier circuit produces the step motor drive electric current.The pulse display module is the forward and backward that shows step-by-step counting and motor, this module is made up of chips such as CO40110, CO4081, the signal that it sends main frame carries out " pretreatment " back as the CP pulse, make the R--S upset, allow enumerator by add mode work, the output decimal system number, the corner value of demonstration motor.Power module provides the working power of projector, video camera, controller, and the power supply classification has direct current+12 volt, direct current+24 volt, exchanges 30 volts.Direct current+24 volt, direct current+12 volt power supply are Switching Power Supply, and it is adjusted pipe and is operated on off state, and this circuit has that power consumption is little, power is high, volume is little, in light weight, advantage that voltage stabilized range is wide, and exchanging 30 volts is the halogen tungsten lamp power supply.

Claims (1)

1, a kind of human body dimension measurement method, use video camera, projector and computer are as testing tool, it is characterized in that: the test desk that sets in advance a level, on this test desk, set reference plane perpendicular to this test desk, and in the field range of these reference plane, set up a marking plate, with reference plane is the symmetrical centre plane, symmetric position in its two sides is provided with described video camera and projector, the place is provided with black screen in background, tested person's body is positioned at the reference plane place, the video camera of reference plane one side and the front of the tested human body of projector alignment, the back side of the video camera of reference plane opposite side and the tested human body of projector alignment, described projector uses the white light line source, a sinusoidal glass raster is housed on it, this grating is provided with start mark, the white light line sees through sinusoidal glass raster and forms structured light, projector projects the tested person surface with this structured light and forms the deformed grating map, described sinusoidal glass raster can be done equidistant stepping perpendicular to optical axis and move three phase places in a pitch, return initial phase then, in the process that grating moves, make the front and back of tested human body respectively produce four amplitude variation shape grating maps, take in this eight width of cloth map in the described computer synchronously continuously with described video camera, computer special-purpose software by establishment, deformed grating map to tested human body is carried out pretreatment, rim detection, image processing and phase calculation, obtain the three-dimensional coordinate data of tested person surface each point, and then calculate required anthropometric data and configuration of surface.

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