JP2016096988A - Body height measurement method, body height measurement apparatus, and body height measurement program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a body height measurement method, a body height measurement apparatus and program capable of measuring a body height while the body is in a lying posture.SOLUTION: A body height measurement apparatus 1 takes images of the body of a subject 5 at plural imaging positions and generates a three-dimensional image of the body on the basis of the taken images. Then, the body height measurement apparatus 1 converts plural measurement points set on the generated three-dimensional image to coordinates on a two-dimensional plane, and measures the distance between the measurement points projected on the two-dimensional plane on the basis of the converted coordinates, otherwise calculating the height of the body on the basis of the calculated distance.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a height measuring method, a height measuring device, and a height measuring program.

  In recent years, with the aging of the population, the number of patients who are bedridden is increasing. For such medication and nutritional management, it is necessary to know the exact height and weight. In addition, at the time of hospitalization at a medical facility or when using a nursing facility, the essential items for evaluation are the height and weight in terms of nutritional management of the subject. Specifically, the amount of energy consumed is determined by using height and weight data to calculate resting metabolic rate and activity. Regarding weight, wheel scales for wheelchairs, beds, etc. have been developed, but regarding height, height meters are only for standing. Therefore, there is a demand for a method for measuring the height when the body is bent in the sleeping position. For the horizontal measurement in the bedridden state, a three-point, four-point, and five-point method for dividing from the top of the head to the heel, an Ishihara-type measurement method, a calculation method using knee height, and the like are used. Measurements using these methods are measured and summed by measuring each part, so it is necessary for the same person to perform under the same conditions, errors are likely to occur, and there are problems such as measuring multiple times and taking the average value. there were.

  For example, in Patent Document 1, a flexible thin bar having a base plate fixed to one end is slidably supported on a thin plate so that the position on the thin plate can be read or indicated. The base plate is closely attached to the sole of the foot, and the slender bar is bent along the body, and the backing plate is slid so as to contact the top of the head. A height meter that enables measurement is disclosed.

  Patent Document 2 discloses a measuring belt attached to the chest and waist of the human body, a light that illuminates the human body, a CCD camera that captures an image of the human body measuring belt illuminated by the light, A human body size measuring system including a personal computer that calculates the size of a human body such as a chest circumference and a waist circumference based on a captured image is disclosed.

  Further, Patent Document 3 discloses a base, a support column standing upright and retractably on the base, a neck position setting means attached to the upper part of the support column in a horizontal direction, and the support column. Lumbar position setting means attached so as to be movable up and down, an angle detection arm whose tip pivotably attached to the hip position setting means reaches the neck position setting means, and a turning angle of the angle arm is detected. And a posterior vertebral column measuring device configured with a detecting means.

JP 10-328166 A JP-A-10-262950 JP 7-111986

  According to the present invention, it is an object to provide a body measuring method, a height measuring apparatus, and a program capable of measuring height while the body is in a sleeping position.

  The height measuring method according to the present invention is a setting step of setting a plurality of sections according to the position of each part of the body, and measuring the length projected on the two-dimensional plane of each set section, or A measurement step to calculate, and an addition step to add the measurement or the calculated length of each section.

  Preferably, the computer further includes a generation step of generating a three-dimensional image of the body, and in the setting step, the measurer performs a plurality of measurements to be an end of the section on the generated three-dimensional image. A point is set, and in the measurement step, the computer specifies a projected measurement point obtained by projecting the set plurality of measurement points onto a two-dimensional plane, and the length between the specified projected measurement points is determined for each section. Calculated as length.

  Further, the height measuring device according to the present invention includes an imaging unit that images the body at a plurality of imaging positions, a 3D generation unit that generates a three-dimensional image of the body based on the images captured by the imaging unit, A projection unit that converts a plurality of measurement points set on the three-dimensional image generated by the 3D generation unit into coordinates on a two-dimensional plane, and a two-dimensional plane based on the coordinates converted by the projection unit A distance measuring unit that measures a distance between the projected measurement points; and a height calculating unit that calculates the height of the body based on the distance calculated by the distance measuring unit.

  Preferably, the three-dimensional image generated by the 3D generation unit is displayed, and a measurement point reception unit that receives an operation for setting a measurement point by a user, and a user operation received by the measurement point reception unit. A measurement point setting unit for setting measurement points composed of three-dimensional coordinates, and the projection unit converts the three-dimensional coordinates of the measurement points set by the measurement point setting unit into coordinates on a two-dimensional plane. To do.

  Preferably, based on the three-dimensional image generated by the 3D generation unit, a part specifying unit that specifies an image region corresponding to a specific part of the body, and a position of the image region specified by the part specifying unit A measuring point setting unit configured to set measuring points composed of three-dimensional coordinates, and the projection unit converts the three-dimensional coordinates of the measuring points set by the measuring point setting unit into coordinates on a two-dimensional plane. Convert.

  Preferably, the apparatus further includes a plane specifying unit that specifies a plane of a plane on which the body is placed based on an image shot by the shooting unit, and the projection unit is a plane specified by the plane specifying unit. Is converted into a measurement point composed of two-dimensional coordinates as the two-dimensional plane.

  Preferably, the imaging unit continuously captures images while causing the camera to scan at least in the longitudinal direction of the body, and the 3D generation unit combines a plurality of continuously captured images, Generate a three-dimensional image of the body.

  Further, the program according to the present invention is a step of setting a plurality of sections according to the position of each part of the body, and measuring the length projected on the two-dimensional plane of each set section, or The computer is caused to execute a measurement step to calculate and an addition step to add the measured lengths of the sections.

  According to the present invention, the height can be measured while the subject is in the sleeping position.

It is a schematic block diagram which illustrates the hardware constitutions of the height measuring apparatus 1 which concerns on this embodiment. It is a figure which illustrates the functional structure of the height measurement program 100 which concerns on this embodiment. It is a flowchart explaining the height measurement process (S10) in this embodiment. It is the schematic which illustrates the height measuring method which concerns on this embodiment. It is a figure which illustrates functional composition of height measuring device 1 concerning a modification.

  Hereinafter, the configuration of an embodiment of the present invention will be described with reference to the drawings. However, the scope of the present invention is not limited to the illustrated examples.

FIG. 1 is a schematic configuration diagram illustrating a hardware configuration of a height measuring apparatus 1 according to this embodiment.
As illustrated in FIG. 1, the height measuring device 1 includes a camera 2 and a height calculating device 3 configured by a wired or wireless connection such as a USB connection.

  The camera 2 images the body of the subject 5. For example, the measurer continuously captures images while scanning the camera 2 in at least the longitudinal direction of the body. The camera 2 may be either single-lens or stereotype.

  The height calculation device 3 is a general-purpose personal computer. The height calculation device 3 only needs to have an image display function, a user interface with an operator, and a pointing device. For example, the height calculation device 3 may be a tablet terminal and is not limited thereto. A height measurement program 100 is installed in the height calculation device 3 and executes height calculation.

The height measurement program 100 generates a three-dimensional image from the image taken by the camera 2 and measures or calculates the height of the subject 5 based on the measurement points specified by the user.
The plane table 4 is a bed or stretcher on which the body of the subject 5 is placed, and is a two-dimensional plane that projects the three-dimensional coordinates of the measurement point specified by the three-dimensional image.

FIG. 2 is a diagram illustrating a functional configuration of the height measurement program 100 according to the present embodiment.
As illustrated in FIG. 2, the height measurement program 100 according to the present embodiment includes a photographing unit 20, a 3D generation unit 21, a projection unit 22, a distance measurement unit 23, a height calculation unit 24, and a measurement point reception unit. 25, a measurement point setting unit 26, and a plane specifying unit 28.

  The imaging unit 20 images the body of the subject 5 at a plurality of positions with the camera 2. For example, the imaging unit 20 continuously images the subject 5 from a plurality of positions while causing the camera 2 to scan at least in the long axis direction of the body. The imaging unit 20 may scan the periphery of the body of the subject 5 using a 3D scanner.

  The 3D generation unit 21 generates a three-dimensional image 10 of the body of the subject 5 based on the image captured by the imaging unit 20. For example, the 3D generation unit 21 calculates a three-dimensional coordinate based on the stereo image captured by the imaging unit 20 and generates the three-dimensional image 10. Further, the 3D generation unit 21 may generate the three-dimensional image 10 from the three-dimensional coordinates measured by the 3D scanner.

  The measurement point reception unit 25 displays the 3D image 10 generated by the 3D generation unit 21 on the height calculation device 3 and receives a user operation. For example, the measurement point receiving unit 25 receives a user operation by the pointing device of the height calculation device 3. The measurement point receiving unit 25 can easily allow the user to specify measurement points that are difficult to determine on a plane by rotating and / or enlarging the three-dimensional image 10.

  The measurement point setting unit 26 sets a measurement point composed of three-dimensional coordinates based on a user operation received by the measurement point receiving unit 25. For example, the measurement point receiving unit 26 sets the measurement point based on a user operation. Specifically, among the crown 30, the seventh cervical vertebra 31, the lower scapula 32, the thoracolumbar vertebra transition portion 33, the greater trochanter 34, the knee joint 35, the sole 36, and the like, the crown 30 and the sole 36 Including at least two points are set as measurement points. Further, the number of measurement points is not limited to this and may be arbitrarily increased.

  The plane identifying unit 28 identifies the plane of the plane table 4 on which the body of the subject 5 is placed based on the image captured by the imaging unit 20. For example, the plane specifying unit 28 specifies, as the two-dimensional plane 40, the common part of the Z-axis value among the three-dimensional coordinates of the three-dimensional image 10 generated based on the image shot by the shooting unit 20. Further, the plane specifying unit 28 may extract the plane of the three-dimensional image 10 and specify the two-dimensional plane 40 using a plane function with the largest size as the plane table 4. Further, the two-dimensional plane 40 may be a plane table 4 or a plane parallel to the plane table 4, and is not limited to this.

  The projection unit 22 converts the plurality of measurement points set on the three-dimensional image by the measurement point setting unit 26 into measurement points composed of two-dimensional coordinates on the two-dimensional plane 40 specified by the plane specifying unit 28. For example, the projection unit 22 includes the measurement point set by the measurement point setting unit 26, the crown 30, the seventh cervical vertebra 31, the lower scapula 32, the thoracolumbar vertebra transition unit 33, the greater trochanter 34, the knee joint 35, and the foot. The base 36 is converted into coordinates on the two-dimensional plane 40, that is, the crown 30a, the seventh cervical vertebra 31a, the lower scapula 32a, the thoracolumbar vertebra transition part 33a, the greater trochanter 34a, the knee joint 35a, and the sole 36a. . Specifically, the projection unit 22 sets the value of the Z axis of the three-dimensional coordinates of the measurement point to the same value as the value of the two-dimensional plane 40.

  The distance measurement unit 23 calculates a linear distance between two measurement points projected on the two-dimensional plane 40 based on the coordinates converted by the projection unit 22. Further, the distance measuring unit 23 may calculate an approximate curve at the neighboring points with respect to the distance between the measuring points.

  The height calculation unit 24 calculates the body height of the subject based on the distance between the measurement points measured by the distance measurement unit 23. Specifically, the height calculation unit 24 adds the linear distances between the two measurement points calculated by the distance measurement unit 23. The height calculation unit 24 may correct the sum of the straight line distances based on an approximate curve between measurement points.

FIG. 3 is a flowchart for explaining the height measurement process (S10) in the present embodiment.
As illustrated in FIG. 3, in step 101 (S <b> 101), the 3D generation unit 21 generates a three-dimensional image 10 of the body of the subject 5 based on the image captured by the imaging unit 20.

  In step 102 (S102), the measurer sets a plurality of sections according to the position of each part of the body on the three-dimensional image generated in S101. Set a point. The measurement point may be set by an operation using a pointing device on a three-dimensional image or by setting a human body model automatically recognized in advance.

  In step 103 (S103), the plane identifying unit 28 identifies the plane of the plane table 4 on which the body of the subject 5 is placed based on the image photographed by the photographing unit 20, and the projecting unit 22 performs S102. A projection measurement point obtained by projecting the plurality of measurement points set in step 2 onto the two-dimensional plane 40 is specified. The projection of the measurement point onto the two-dimensional plane 40 is, for example, a two-dimensional plane on which the plane table 4 is projected by setting the Z-axis value of the X-axis, Y-axis, and Z-axis coordinate values of the three-dimensional coordinates to 0. However, the projection may be performed by setting the two-dimensional plane 40 as a plane parallel to the plane table 4 and setting the value of the Z-axis to the same value as the two-dimensional plane 40, but is not limited thereto. .

  In step 104 (S104), the distance measurement unit 23 calculates the length between the measurement points specified on the two-dimensional plane 40 in S103 as the length of each section. Specifically, a linear distance between two projection measurement points is calculated. Further, the distance measuring unit 23 may calculate an approximate curve at the neighboring points with respect to the distance between the measuring points.

  In step 105 (S105), the height calculator 24 adds the lengths of the sections measured in S104. Specifically, the height calculation unit 24 adds the lengths of the sections between the two measurement points calculated by the distance measurement unit 23. Further, the height calculation unit 24 may correct the sum of the linear distances calculated in S104 based on the approximate curve between the measurement points.

FIG. 4 is a schematic view illustrating the height measuring method according to this embodiment.
As illustrated in FIG. 4a, the height measuring device 1 generates a three-dimensional image 10 of the body of the subject, and sets a plurality of sections on the generated image by the operation of the measurer.
Specifically, as illustrated in FIG. 4 b, the measurer includes the crown 30, the seventh cervical vertebra 31, the lower scapula 32, the thoracolumbar vertebra transition portion 33, the greater trochanter 34, the knee joint 35, and the sole 36. Are set as two or more measurement points including at least the crown 30 and the sole 36. In addition, the number of measurement points is not limited to this, and the number of measurement points may be arbitrarily increased. In addition, the measurement point may be an image area corresponding to a specific part from three-dimensional coordinates, and the measurement point may be automatically set based on the position.

  Next, the height measuring device 1 specifies the projected measurement points obtained by projecting the set measurement points onto the two-dimensional plane 40, and determines the length between the specified projected measurement points as the length of each section. And the length of each section measured is added to calculate the height of the subject. Specifically, the length of the line 50 connecting the head 30a, the seventh cervical vertebra 31a, the lower scapula 32a, the thoracolumbar vertebra transition part 33a, the greater trochanter 34a, the knee joint 35a, and the sole 36a, which are projection measurement points. Measure. The measurement in the present embodiment includes calculation by a computer of the distance between measurement points.

As described above, according to the present embodiment, the height measuring apparatus 1 can measure the height even when the subject cannot take the posture of standing or supine.
In the method of the present invention, the height of the subject can be easily measured with a reduced error as compared with the conventional method in a state where the body in the sleeping position is bent. In the sleeping position, an invisible part that cannot be scanned is formed. However, the height measuring device 1 can measure the length of each section from the 3D shape if the human body shape can be scanned even on the subject's half body. The height of the body can be measured. Further, by rotating, enlarging, and reducing the 3D image, it is possible to easily specify measurement points that are difficult to understand on a plane.

  Although the present embodiment has been described above, the present invention is not limited thereto, and various modifications and additions can be made without departing from the spirit of the invention.

[Modification]
FIG. 5 is a diagram illustrating a functional configuration of the height measuring apparatus 1 according to the modification.
As illustrated in FIG. 5, the height measuring device 1 according to the modification includes a part specifying unit 27.
Hereinafter, the configuration with the same reference sign performs the same operation, and thus the description thereof is omitted.
The part specifying unit 27 specifies an image region corresponding to the specific part of the body based on the three-dimensional image 10 generated by the 3D generating unit 21. The part specifying unit 27 stores, for example, a human body model as a part specifying method, compares the stored human body model with the three-dimensional image 10 of the subject, and searches for similar points. Etc. are specified. It is also possible to correct the measurement point at the site specified by the site specifying unit 27 by the operator's operation. As described above, the height measuring device 1 is not limited to the specific method described in the modified example.

  The measurement point setting unit 26 sets a measurement point composed of three-dimensional coordinates based on the position of the image area specified by the part specifying unit 27.

  As mentioned above, although embodiment concerning a modification was described, it is not limited to these, A various change, addition, etc. are possible within the range which does not deviate from the meaning of invention.

DESCRIPTION OF SYMBOLS 1 Height measurement apparatus 2 Camera 3 Height calculation apparatus 4 Plane table 5 Subject 10 3D image 20 Imaging part 21 3D generation part 22 Projection part 23 Distance measurement part 24 Height calculation part 25 Measurement point reception part 26 Measurement point setting part 27 Site specific part 28 Planar specific part 30 Parietal 31 7th cervical vertebra 32 Lower scapula 33 Thoracic lumbar vertebra transition part 34 Greater trochanter 35 Knee joint 36 Foot sole 40

Claims (8)

A method of measuring height,
A setting step for setting a plurality of sections according to the position of each part of the body;
A measurement step for measuring or calculating a length projected on the two-dimensional plane of each set section;
A height measuring method comprising: an adding step of measuring or adding the calculated length of each section. The computer further comprises a generating step of generating a three-dimensional image of the body;
In the setting step, the measurer sets a plurality of measurement points that are end portions of the section on the generated three-dimensional image,
In the measurement step, a computer specifies a projection measurement point obtained by projecting a plurality of set measurement points onto a two-dimensional plane, and calculates a length between the specified projection measurement points as a length of each section. The height measuring method according to claim 1. An imaging unit for imaging the body at multiple imaging positions;
A 3D generation unit that generates a three-dimensional image of the body based on the image captured by the imaging unit;
A projection unit that converts a plurality of measurement points set on the three-dimensional image generated by the 3D generation unit into coordinates on a two-dimensional plane;
A distance measurement unit that measures a distance between measurement points projected on a two-dimensional plane based on the coordinates converted by the projection unit;
A height measuring device comprising: a height calculating unit that calculates a body height based on the distance calculated by the distance measuring unit. A measurement point receiving unit that displays the three-dimensional image generated by the 3D generation unit and receives an operation of setting a measurement point by a user;
A measurement point setting unit configured to set a measurement point composed of three-dimensional coordinates based on a user operation received by the measurement point reception unit;
The height measuring apparatus according to claim 3, wherein the projection unit converts the three-dimensional coordinates of the measurement points set by the measurement point setting unit into coordinates on a two-dimensional plane. A part specifying unit that specifies an image region corresponding to a specific part of the body based on the three-dimensional image generated by the 3D generating unit;
A measurement point setting unit for setting a measurement point consisting of three-dimensional coordinates based on the position of the image region specified by the part specifying unit;
The height measuring apparatus according to claim 3, wherein the projection unit converts the three-dimensional coordinates of the measurement points set by the measurement point setting unit into coordinates on a two-dimensional plane. A plane identifying unit that identifies the plane of the plane on which the body is placed based on the image captured by the imaging unit;
The height measuring apparatus according to claim 3, wherein the projection unit converts the plane specified by the plane specifying unit as the two-dimensional plane into a measurement point including two-dimensional coordinates. The imaging unit continuously captures images while scanning the camera in at least the long axis direction of the body,
The height measuring apparatus according to claim 3, wherein the 3D generation unit generates a three-dimensional image of the body by combining a plurality of images taken continuously. A setting step for setting a plurality of sections according to the position of each part of the body;
A measurement step for measuring or calculating a length projected on the two-dimensional plane of each set section;
A program that causes a computer to execute an addition step of adding the measured lengths of each section.

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