JPH024336A - Method and device for measuring human body shape change - Google Patents

Abstract

PURPOSE:To improve reproducibility and accuracy by image-forming a slit picture in the measured part of the human body, photographing this picture from an oblique direction with a video camera, measuring a position on the cathode ray tube of a television to display this video and obtaining a change with lapse of time in a distance between suitable two points in the measured part or in the position of a specified point. CONSTITUTION:A patient is laid upward on a ridge-shaped protruding part 3 of a bed and the position of a sliding stand 5 is controlled in a length-wise direction and an upper and lower direction. Then, the face part, for example, of a patient body 34 is fixed by a pressing plate 33. Next, the position control in a width-wise direction and turn control is executed for a supporting stand 15, which supports a projector 19 and a video camera 21, and a slit picture 13 is image-formed in the measured part of the human body 34. Then, the slit picture is photographed by the video camera 21 having an optical axis, which is inclined to the optical axis of the projector 19 by 45 deg.(alpha), for example. After that, the slit picture is displayed on the cathode ray tube(CRT) of the television as an image and the position of the picture on the CRT is measured with using a computer software. Then, the change after lapse of day and time is obtained for the distance between the suitable two points in the measured part or the position of the specified point.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method and apparatus for non-contact measuring the external shape of a human body, and particularly to a method and apparatus for measuring changes in the human body shape. [Technology] Measuring minute changes in the external shape of the human body is extremely important for determining the progression of a patient's disease or the process of recovery, and is useful for diagnosing Grassedu's disease, diabetes, cancer patients, patients with internal organs disease, etc. It is essential.

However, until now, diagnosis has been left to the visual inspection of doctors, and there are almost no devices that can quantitatively measure this.

In other words, conventional non-contact external measurement methods and devices for the human body include those that are visually visible with a mirror so that the scale can be seen along with the part to be measured, and those that use a laser and triangulate the measurement of the light source -> body measurement point -> light receiving. At most, there was a method that involved taking a new measurement of the body, scanning it against the human body, and writing the profile.

[Problem to be solved by the invention]

Conventional visual methods are cumbersome to measure and extremely inaccurate, while those that use a laser require several seconds to scan, resulting in errors due to the movement of the part of the human body being measured, resulting in poor reproducibility. Unfortunately, there was a big problem with accuracy.

[Means to solve the problem]

The present invention was developed with the aim of solving the above-mentioned drawbacks of the prior art and obtaining necessary and sufficient measurement accuracy, reproducibility, and ease of measurement.
To explain using FIGS. 1 to 3 corresponding to the example, the first
In the human body shape change measuring method according to the invention, a slit image 13 is projected onto a measurement target part of a human body 34 using an optical slit image projector 19.
This is imaged from an oblique direction by the video camera 21, the image is displayed on the cathode ray tube of the TV, the position on the cathode ray tube is measured using computer software, and the position on the cathode ray tube is measured using computer software. The human body shape change measuring device according to the second aspect of the present invention includes a support fixing means capable of fixing the human body 34 in a fixed position, and a support fixing means capable of fixing the human body 34 in a fixed position. It has an optical slit image projector 19 that can be adjusted up and down, front and back, and left and right with respect to the object, and a video camera 21 that takes an oblique view of the slit image 13 that is formed by the projector 19 on the part to be measured of the human body 34. It is.

[Effect]

Since the present invention is configured as described above, the position of the slit image projector 19 is adjusted with respect to the human body 34 fixed in a fixed position, the slit image 13 is focused on the part to be measured of the human body 34, and the The slit image 13 is photographed by a video camera 21, the image is displayed on a TV's cathode ray tube, the position on the cathode ray tube is measured using computer software, and the distance between two appropriate points of the part to be measured or a specific point is measured. It is possible to determine the change in position over time.

〔Example〕

An embodiment of the present invention will be described based on the drawings. FIG. 1 is a side view of the entire device, FIG. 2 is a partial front view thereof, and FIG. 3 is a plan view of the entire device. A bed top plate 2 having longitudinal guides 4 on both sides is provided, and an enemy-like protrusion 3 on which a patient's body 34 is placed is provided along the center of the top plate 2.

A sliding table 5 is provided above the bed main body 1 so that lower portions 6 of the sliding table on both left and right sides can slide vertically along the guides 4. In addition to providing a fixing mechanism 7 for the main body 1, the side walls 10 hanging down from the sliding table top plate 9 on both left and right sides via vertical guides 11 provided on one side of the lower part 6 are vertically adjustable. It can be fixed in a vertically adjusted position.

In addition, the lower plate 16 of the support base 15 is rotatably placed on the upper surface of the sliding table upper plate 9 via a rotation guide 14, while the measurement part of the human body 34 is fixed on the lower surface of the upper plate 9. A holding mechanism 32 having a transparent holding plate 33 is provided.

A support base upper plate 17 is provided on the upper surface of the support base lower plate 16 so as to be adjustable laterally via a lateral guide 18, and an optical slit image projector 19 is mounted on one side on the upper surface of the upper plate 17 as a projector support section. 20, a video camera 21 is supported and fixed on the other side by a video camera support section 22, as shown in the drawings.

Here, the optical slit image projector 19 will be explained. As shown in FIG.
A lens 26, a slit portion 25, and a second lens 26 are provided, and a slit image 13 can be formed on the measurement portion of the human body 34, for example, as shown in FIG. 7.8.

The image is photographed by a video camera 21 and displayed as an image on a TV's cathode ray tube (hereinafter referred to as CRT).

The position on the CRT is measured using computer software, and the distance between two appropriate points on the measurement part or the change in the position of a specific point over time is determined.

The slit image 13 may be a single slit image as shown in FIG. Measurement can be facilitated by forming intermittent slit images using a comb-shaped shielding plate (slit cover plate) 27 as shown in FIG.

That is, the slits can be spaced at regular intervals, or at specific pre-programmed intervals, and - shielding in the chamber can be provided to provide intermittent slit images to facilitate confirmation of changes at each location. For example, the shielding plate 27 is formed so that the length of the shielding plate itself corresponding to the slit projection image is 100mm and the width is 1m, the illumination hole 28 is 2mm, the blind part 29 is 4m, and the central illumination hole 30 is four holes. The length of the illumination holes 28 is set to , and eight illumination holes 28 are provided on each side of the central illumination hole 30 located at the center, so that intermittent slit images are generated.

Next, to explain the operation of this embodiment having the above-mentioned configuration, a patient is made to lie down facing upward on the soft protrusion 3 of the bed, and the position of the sliding table 5 is adjusted in the vertical and vertical directions. Then, for example, the forehead of the patient's body 34 is fixed with the holding plate 33 (in the case shown).

Next, the lateral position and rotation of the support base 15 that supports the projector 19 and the video camera 21 are adjusted, the slit image 13 is focused on the part to be measured of the human body 34, and the slit image is focused on the projector 19. For example, 45° (
The image is photographed by a video camera 21 having a tilted optical axis (α) shown in the figure.

In this case, what supports and fixes the human body 34 is not limited to the bed, but may be a support on which the patient can lean appropriately, and although it is difficult to determine a specific point on the human body 34, After ensuring that the human body is fixed to the bed etc., using a shielding plate that generates intermittent slit images as described above, the light slit image from the central illumination hole 30 at the center of the slit image is directed to the area to be measured. By aligning the slit image with a specific point inside the body, such as the corner of the eye or the position of the breast apex, and taking a certain distance from the front, back, left and right, and up and down, changes in that position over time can be determined. , the reproducibility can be ensured.

The slit image projector uses a slit image forming mechanism with a deep depth of focus to avoid the effects of unevenness in the measurement area.
If the projector itself is structured to move three-dimensionally (back and forth, left and right, and up and down) relative to a certain position on the human body, and it can also move diagonally, measurements can be made extremely efficiently and reproducibly. It is possible.

In addition, a slit image is taken at a fixed distance from a specific fixed point, and the fixed distance is sequentially changed, and each slit image is stored on a floppy disk, etc., making it easy to compare with the next measurement. You can also make it

Furthermore, each captured image is displayed simultaneously on a CRT, and 2
Dimensional or three-dimensional changes can be easily visually observed, and the changes can be detected using a computer by comparing the slit image position on the CRT or a specific point on the slit image with the previous position. It can also be determined quantitatively.

By the way, the slit image 13 used in the present invention does not have to be a single thin line as shown in Fig. 7.8;
It is also possible to arrange multiple thin lines at regular intervals as shown in Figure 0, or to combine vertical, horizontal, and diagonal thin lines at appropriate distances or angles as shown in Figure 11.12. This allows you to more intuitively grasp shape changes,
In addition, by using computer software that programs such multiple thin line images on a CRT in advance, it is possible to measure changes in the corresponding positions of each individual, or to determine the total amount or trend of individual changes, thereby making it possible to measure the human body. Changes in shape can also be easily measured.

Further, such slits can be easily manufactured by performing vapor deposition on a transparent plate such as glass, leaving only a plurality of thin lines.

〔Effect of the invention〕

Since the present invention has one or more configurations and functions,
It is especially useful for measuring swelling around the eyes, finding lumps near the breasts, changes in the shape of the larynx, etc., and can quantitatively and easily measure these changes, providing the necessary and sufficient measurement accuracy and reproducibility. The ease of implementation can be achieved.

The present invention combines the principles of the conventional light sectioning method and distance measurement on a CRT, but it is extremely effective for a special measurement object such as the human body, and each method is far more effective than the other methods alone. It produces excellent effects that cannot be realized.

In particular, if you use intermittent slit images, you can check the position after 5 days and time and change it by simply checking the overall C.
Accurate position reproducibility, which cannot easily be achieved by measurement from RT images, can be ensured, and a doctor can accurately and easily diagnose swelling or swelling in the measurement area based on the changes.

[Brief explanation of the drawing]

FIG. 1 is a side view of an embodiment of the human body shape change measuring device according to the present invention, and FIG. 2 is a front view of the lower part thereof. Figure 3 is an open plan view, Figure 4 is an explanatory diagram of the slit image forming mechanism, Figure 5 is a front view of the shielding plate, and Figure 6 is A-A in Figure 5.
Line cross-sectional view, Fig. 7 is an explanatory front view when the slit image is made into one thin line, Fig. 8 is an explanatory perspective view, and Fig. 9 is an explanatory front view when the slit image is made into multiple parallel thin lines. figure,
FIG. 10 is an explanatory perspective view, FIG. 11 is an explanatory front view when the slit image is formed into vertical, horizontal, and diagonal thin lines, and FIG. 12 is an explanatory perspective view. 13...Slit image, 19...Optical slit image projector, 21...Video camera, 34...Human body.

Claims (2)

[Claims] (1) A slit image is formed on the part to be measured on the human body using an optical slit image projector, this is photographed from an oblique direction by a video camera, the image is displayed on a TV's cathode ray tube, and the position on the cathode ray tube is determined. A method for measuring changes in the shape of the human body that uses computer software to measure and determine the distance between two appropriate points on the part to be measured or the change over time in the position of a specific point. (2) Supporting and fixing means capable of fixing the human body in a fixed position, an optical slit image projector that can be adjusted up and down, back and forth, and left and right with respect to the supporting and fixing means, and a part to be measured of the human body using the projector. 1. A human body shape change measuring device comprising a video camera that captures a slit image formed at an angle from an oblique direction.