Radial artery cun-guan-chi positioning device and cun-guan-chi positioning method

Abstract

The invention discloses a radial artery cun-guan-chi positioning device and a cun-guan-chi positioning method.The radial artery cun-guan-chi positioning device comprises a carrying table, a structured light projection device, a near-infrared light source and a camera shooting device, the carrying table carries a tested hand and a wrist, and the near-infrared light source is located below the carrying table and irradiates the wrist; the structured light projection device is located on the carrying table and projects structured light to the hand and the wrist, and the camera shooting device shoots structured light images reflected by the hand and the wrist or near-infrared light images transmitted by the hand and the wrist. The method for positioning cun-guan-chi is executed by using the device, the structured light projection device is used for projecting a structured light bitmap, the camera device is used for shooting an image to determine the wrist cross grain and the same body cun, and a radial artery grayscale image is shot after the wrist is irradiated by near-infrared light; calculating the cross point of the wrist transverse grain center line and the radial artery center line; the radial artery and the cun-guan-chi can be simply, efficiently and accurately positioned, the restriction on the hand is small, and the pulse diagnosis accuracy is improved.

Description

Technical Field

[0001] The present invention belongs to the field of radial artery imaging positioning and Cun, Guan and Chi positioning devices and methods, and in particular, relates to a radial artery Cun, Guan and Chi positioning device and a method for positioning Cun, Guan and Chi. Background Art

[0002] When using an instrument for pulse diagnosis, current pulse diagnosis instruments primarily rely on the operator's finger to feel the patient's radial artery pulse to guide the sensor to the Cun, Guan, and Chi points. Due to the lack of visual anatomical guidance technology, locating the radial artery and locating the Cun, Guan, and Chi points is time-consuming and unreliable, affecting measurement efficiency and accuracy. Alternatively, some instruments use visual positioning, but the equipment structure is relatively complex or the method is cumbersome. Therefore, a device and method that can simply, efficiently, and accurately locate the radial artery, Cun, Guan, and Chi points is needed. Furthermore, the degree of restraint and tension in the patient's hand during pulse diagnosis can lead to errors in the pulse diagnosis results. Locating the radial artery, Cun, Guan, and Chi points and subsequent pulse diagnosis are continuous steps, and the hand's position should be kept fixed throughout this continuous process. Therefore, during the radial artery, Cun, Guan, and Chi point positioning process, restrictions on hand placement should be minimized to improve hand comfort, reduce discomfort and tension, and ultimately improve pulse diagnosis accuracy.

[0003] In view of this, the present invention is proposed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a radial artery Cun, Guan and Chi positioning device and a method for positioning Cun, Guan and Chi, which can simply, efficiently and accurately locate the radial artery and Cun, Guan and Chi, reduce the restrictions on hand placement, and improve the accuracy of pulse diagnosis and treatment.

[0005] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0006] The radial artery cun, guan and chi positioning device includes a mounting platform, a structured light projection device, a near-infrared light source, and a camera device.

[0007] The mounting platform can transmit near-infrared light and is used to carry the hand or wrist to be measured.

[0008] A near-infrared light source is located below the mounting platform and emits transmissive near-infrared light to irradiate the radial artery area or more of the wrist on the mounting platform, so that the radial artery absorbs the near-infrared light for imaging;

[0009] The structured light projection device is located above the mounting platform and projects structured light onto the hand and wrist on the mounting platform to determine the position of the wrist crease and the length of the same body.

[0010] The camera device is located above the mounting platform and captures the structured light image reflected by the hand and wrist or the transmitted near-infrared light image.

[0011] Furthermore, the structured light projection device can project line structured light and surface structured light bitmaps.

[0012] Furthermore, the structured light projection device projects a line structured light stripe pattern onto the horizontal line of the middle section of the middle finger and illuminates the four fingers that are put together along the direction of the horizontal line;

[0013] The structured light projection device projects a surface structured light pattern to illuminate the palm and wrist, or the structured light projection device projects a line structured light stripe pattern to illuminate the transverse wrist crease.

[0014] Furthermore, a cut-in near-infrared light filter is provided in front of the camera device to shield visible light from entering the camera device.

[0015] Furthermore, the placement platform includes a table surface that can transmit near-infrared light; or, when the placement platform supports the hand, the position corresponding to the radial artery area is hollowed out.

[0016] Furthermore, the radial artery Cun, Guan and Chi positioning device also includes a computer and a display, which are connected to the camera device to display and process images.

[0017] The present invention provides a method for locating the Cun, Guan, and Chi points, using the aforementioned radial artery Cun, Guan, and Chi positioning device. A structured light projection device is used to project a surface structured light bitmap onto the palm and wrist on a support platform, which is captured by a camera and processed to generate a wrist transverse crease depth image. Alternatively, a line structured light bitmap is projected onto the wrist to generate a wrist transverse crease line structured light fringe image, which is captured by a camera.

[0018] Irradiating a wrist on a stage with near-infrared light and capturing a radial artery grayscale image with a camera; extracting a centerline of the wrist crease from a wrist crease depth image or a wrist crease structured light fringe image; and extracting a radial artery centerline from the radial artery grayscale image.

[0019] Calculate the intersection point of the centerline of the wrist crease and the centerline of the radial artery;

[0020] The distance from the intersection point along the radial artery toward the elbow is determined as the Cun section.

[0021] The area from the intersection point along the radial artery to the elbow, from one body inch distance to two body inch distances, is defined as the joint.

[0022] The interval from the intersection point along the radial artery to the elbow, which is two to three body lengths away, is defined as the radial part.

[0023] Furthermore, a sequential surface structured light fringe bitmap is projected onto the front of the palm and wrist, and a camera device is used to capture the reflected sequential surface structured light fringe image. A three-dimensional depth image of the palm and wrist is generated by a computer, and a Gaussian low-frequency filter is performed on the three-dimensional depth image. The height-sharp change boundary of the Gaussian low-frequency image is searched for to generate a wrist fringe depth image to determine the wrist fringe.

[0024] Alternatively, a line structured light stripe bitmap is projected onto the biological wrist transverse lines of the wrist to generate a wrist transverse line structured light stripe image to determine the wrist transverse lines.

[0025] Furthermore, the center line of the wrist transverse lines is extracted from the wrist transverse lines determined by the wrist transverse line depth image or the wrist transverse line structured light fringe image, and the points on the center line are assigned a value of 255, and the other points are assigned a value of 0; the center line of the radial artery is extracted from the radial artery grayscale image, and the points on the center line are assigned a value of 255, and the other points are assigned a value of 0; the points assigned a value of 255 are traversed, and the position coordinate values ​​are compared. The points with the same position coordinate values ​​are the intersection points of the center line of the wrist transverse lines and the center line of the radial artery.

[0026] Furthermore, a line structured light stripe bitmap is projected onto the four fingers from the index finger to the little finger that are put together, and the line structured light stripe bitmap is horizontally aligned with the horizontal line of the middle section of the middle finger. The line structured light stripe image of the finger is collected, and the horizontal length of the stripes on the four fingers at the horizontal line of the middle section of the middle finger in the above line structured light stripe image is used to calculate the length of three inches of the same body inch, and then determine the length of the same body inch.

[0027] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0028] The present invention discloses a radial artery, cun, guan, and chi positioning device and a method for locating the cun, guan, and chi. The radial artery, cun, guan, and chi positioning device comprises a mounting platform, a structured light projection device, a near-infrared light source, and a camera. The mounting platform is capable of transmitting near-infrared light and is used to support the hand or wrist being measured. The near-infrared light source is located below the mounting platform and emits transmissive near-infrared light to illuminate the radial artery region or more of the wrist on the mounting platform, causing the radial artery to absorb the near-infrared light and be imaged. The structured light projection device is located above the mounting platform and projects structured light onto the hand or wrist on the mounting platform to determine the position of the wrist crease and the length of the same body. The camera is located above the mounting platform and captures a structured light image reflected from the hand or wrist or a transmitted near-infrared light image. The method for locating the cun, guan, and chi is performed using the aforementioned radial artery, cun, guan, and chi positioning device. A structured light projection device is used to project a surface structured light bitmap onto the palm and wrist on the platform, and the above image is captured by a camera device, and processed to generate a wrist transverse crease depth image; or a line structured light bitmap is projected onto the wrist to generate a wrist transverse crease line structured light stripe image, and the above image is captured by a camera device; the wrist transverse crease is determined by one of the above two methods, and then the wrist on the platform is illuminated with near-infrared light and captured by a camera device to form a radial artery grayscale image; the centerline of the wrist transverse crease in the wrist transverse crease depth image or the wrist transverse crease line structured light stripe image is extracted; the radial artery centerline in the radial artery grayscale image is extracted; the intersection point of the wrist transverse crease centerline and the radial artery centerline is calculated; and the Cun, Guan, and Chi sections are determined in sequence along the radial artery toward the elbow from the intersection point. The radial artery Cun, Guan, and Chi positioning device and method for positioning the Cun, Guan, and Chi of the present invention have a simple device structure and a simple and feasible method. They can simply, efficiently, and accurately locate the radial artery and the Cun, Guan, and Chi parts, and reduce restrictions on hand placement, thereby improving the accuracy of pulse diagnosis.

[0029] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings:

[0031] Figure 1 Schematic diagram of the radial artery Cun, Guan and Chi positioning device of the present invention;

[0032] Figure 2 It is a flowchart of image acquisition and generation in the method of locating Cun, Guan and Chi;

[0033] Figure 3 This is a flowchart of image processing in the method for locating Cun, Guan, and Chi;

[0034] Figure 4 This is a flow chart of Cun, Guan, and Chi positioning in the method of positioning Cun, Guan, and Chi.

[0035] In the figure: 1. Structured light projection device; 2. Camera device; 3. Near-infrared light filter; 4. Object to be measured; 5. Mounting platform; 6. Near-infrared light source.

[0036] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only used to facilitate the description of the present invention and simplify the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0039] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0040] The radial artery Cun, Guan, and Chi positioning device and the Cun, Guan, and Chi positioning method of the present invention are Cun, Guan, and Chi positioning equipment and methods for pulse diagnosis.

[0041] Following the classical theory of pulse diagnosis in Traditional Chinese Medicine, the precise positioning of the Cun, Guan, and Chi points by artificial intelligence requires three prerequisites: 1. Visualization of the radial artery; 2. Precision of body surface landmarks; and 3. Personalized SIM Cun. To this end, the method for locating the Cun, Guan, and Chi points in this invention employs the following technical solutions: near-infrared light transmission illuminates the wrist area to image the radial artery; reflective structured light accurately locates the wrist creases; reflective structured light illumination accurately measures the personalized SIM Cun length; and, based on the intersection of the wrist crease centerline and the radial artery centerline, determines the Cun, Guan, and Chi intervals in conjunction with the SIM Cun.

[0042] The radial artery Cun, Guan and Chi positioning device used in the present invention is as follows: Figure 1 As shown, it includes a mounting platform 5, a structured light projection device 1, a near-infrared light source 6, a camera device 2, a computer and a display.

[0043] The mounting platform 5 is used to support a human hand as the object to be measured 4 , and the mounting platform 5 can transmit near-infrared light.

[0044] The near-infrared light source 6 is located below the mounting platform 5 and is used to emit transmissive near-infrared light to illuminate the wrist area of ​​the human hand located on the mounting platform 5. The near-infrared light at least illuminates the radial artery area of ​​the wrist, and may also illuminate more parts of the wrist including the radial artery area, so that the radial artery absorbs the near-infrared light and is imaged, thereby assisting the camera device 2 in realizing near-infrared imaging of the radial artery.

[0045] The structured light projection device 1 is located above the mounting platform 5 and is used to project a structured light bitmap onto the hand and wrist to determine the position of the wrist crease and the length of the same body. In this application, the palm and fingers belong to the hand.

[0046] The camera device 2 is located above the mounting platform 5 and is used to capture a structured light image reflected by the hand and wrist, and an image of the wrist region after near-infrared light is transmitted. The structured light image reflected by the hand and wrist refers to the image of the hand and wrist after the structured light bitmap is projected. The image of the wrist region after near-infrared light is transmitted refers to the image of the wrist region after near-infrared light has penetrated the wrist region.

[0047] The computer is connected to the camera device 2 and displays the captured images through the display. The computer processes the images and displays them through the display.

[0048] Since the hand needs to be placed still when locating the radial artery Cun, Guan and Chi, a platform 5 is provided for supporting the hand. In order to avoid the platform 5 blocking the near-infrared light when the near-infrared light emitted by the near-infrared light source 6 irradiates the radial artery for imaging, the platform 5 can transmit the near-infrared light. In this embodiment, the surface of the platform 5 is made of a material with high transmittance for near-infrared light, so it can transmit near-infrared light; in other embodiments, the surface of the platform 5 is a structure with a hollow area, and when it carries the hand, at least the position corresponding to the radial artery area is hollowed out. In this way, the near-infrared light can directly pass through the hollow area of ​​the platform 5 surface when irradiated, and will not be blocked by the surface of the platform 5. It can be understood that in order to avoid the radial artery from being offset in the hollow area, the width of the hollow area should be appropriately larger than the width of the radial artery, or the size and position of the hollow area can be adjusted to meet the near-infrared light irradiation requirements of the radial artery area. The radial artery region described in this invention refers to the radial artery and the surrounding areas on both sides of the radial artery. Since the centerline of the radial artery will need to be determined in subsequent steps, the radial artery and the surrounding areas on both sides need to be irradiated to ensure complete imaging of the radial artery and ease of operation in determining the boundaries of the near-infrared irradiation area. The width of the area near one side of the radial artery can be set according to actual needs.

[0049] When the radial artery inch, guan, and chi positioning device is in use, the back of the wrist, palm, and four fingers of the hand are placed face down on the support table 5, and a structured light projection device 1 and a camera device 2 are provided above the wrist, palm, and fingers. The field of view of the structured light projection device 1 covers the wrist, palm, and fingers. The structured light projection device 1 can project a sequential surface structured light stripe bitmap for determining the wrist transverse lines onto the wrist and palm area, or project a line structured light stripe bitmap for determining the wrist transverse lines onto the biological wrist transverse lines of the wrist. The structured light projection device 1 can also project a line structured light stripe bitmap for determining the same body inch length onto the transverse lines of the middle finger. The camera device 2 collects the structured light image reflected by the skin of the wrist, palm, or fingers through an imaging lens. The structured light image collected by the camera device 2 is input into the computer via a gigabit network cable.

[0050] Near-infrared light source 6 is disposed non-contactly below support platform 5. The near-infrared light emitted by near-infrared light source 6 first penetrates the surface of support platform 5 toward the back of the wrist, and then exits from the front of the wrist. The near-infrared light emitted from the front of the wrist passes through a cut-in near-infrared filter 3 in front of the imaging lens of camera device 2, and is imaged above the wrist by the same camera device 2 used to capture the structured light image. As the near-infrared light penetrates the wrist, the radial artery absorbs the near-infrared light, while other tissues transmit it. This creates a dark vascular image against a bright background in the image captured by camera device 2, resulting in a dark radial artery and a bright surrounding area.

[0051] In the present invention, the cut-in near-infrared filter 3 in front of the imaging lens of the camera device 2 can be placed in front of the imaging lens of the camera device 2 or removed as needed. When capturing near-infrared images, it is placed in front of the imaging lens of the camera device 2 to block visible light from entering the camera device 2. When capturing structured light images, it is removed from the imaging lens of the camera device 2.

[0052] The present invention provides a method for locating the Cun, Guan, and Chi meridians, which is implemented using the above-mentioned radial artery Cun, Guan, and Chi positioning device.

[0053] First, image acquisition and generation are performed. The process is as follows: Figure 2 As shown:

[0054] First, the structured light projection device 1 projects a line structured light fringe pattern aligned with the horizontal crease of the middle segment of the middle finger. The wrist and hand are then positioned so that the line structured light fringe pattern illuminates the four fingers (from index finger to pinky) along the horizontal crease of the middle segment of the middle finger. The camera device 2 captures an image of the line structured light fringe pattern of the finger, where the bright fringe is located.

[0055] Next, the structured light projection device 1 projects a sequential surface structured light fringe bitmap onto the front of the wrist and palm, and the camera device 2 captures the sequential surface structured light fringe image reflected back from the skin. The captured sequential surface structured light fringe image is reconstructed by a computer to generate a 3D depth image of the front of the palm and wrist. The 3D depth image is then subjected to a Gaussian low-frequency filter, and the wrist-palm boundary is searched for abrupt height changes in the Gaussian low-frequency filter, generating a wrist-palm boundary depth image, thereby determining the wrist fringe.

[0056] The above is a method for determining the transverse wrist lines. In other embodiments, the following method can also be used to determine the transverse wrist lines: the structured light projection device 1 projects a line structured light stripe bitmap at the biological transverse wrist lines on the wrist, and the camera device 2 collects the line structured light stripe image of the transverse wrist lines reflected back from the transverse wrist lines, and uses this line structured light stripe image as the transverse wrist lines to determine the transverse wrist lines.

[0057] Finally, the near-infrared light source 6 emits near-infrared light to illuminate the radial artery area or more of the wrist located on the mounting platform 5 , so that the radial artery absorbs the near-infrared light, and the camera device 2 captures and forms a radial artery grayscale image.

[0058] Second, process the image again. The processing flow is as follows Figure 3 shown.

[0059] First, extract the center line of the wrist transverse crease from the aforementioned wrist transverse crease depth image or wrist transverse crease line structured light fringe image, assign the pixel points on the center line to 255, and assign the other points to 0; extract the radial artery center line from the radial artery grayscale image, assign the pixel points of the center line to 255, and assign the other points to 0; traverse the points assigned 255, compare the position coordinate values, and the points with the same position coordinate values ​​are the intersection points of the wrist transverse crease center line and the radial artery center line.

[0060] For the collected finger line structured light stripe image, the horizontal length of the stripes on the four fingers at the transverse line of the middle section of the middle finger in the line structured light stripe image is used to calculate the number of pixels corresponding to the length of three same body inches (that is, the length of this stripe is three same body inches), and then the number of pixels corresponding to the same body inch length is determined, that is, the same body inch length in the image is determined by the number of pixels.

[0061] 3. Divide and locate the Cun, Guan and Chi parts, such as Figure 4 shown.

[0062] On the radial artery grayscale image, starting from the intersection of the wrist crease centerline and the radial artery centerline, count along the radial artery toward the elbow and combine the number of pixels corresponding to the same body length mentioned above.

[0063] A distance interval with the same number of pixels is divided into an inch part;

[0064] The interval from one same-size pixel distance to two same-size pixel distances is divided into the critical part;

[0065] The interval between two same-size pixels and three same-size pixels is divided into the scale part.

[0066] That is, starting from the intersection of the radial artery centerline and the wrist transverse line centerline, along the radial artery toward the elbow, three consecutive length intervals formed by the same number of inch pixels are respectively the Cun part, the Guan part and the Chi part, thereby realizing the positioning of the Cun, Guan and Chi parts.

[0067] The present invention realizes the precise positioning and standardization of the Cun, Guan, and Chi on the radial artery through visualization of the radial artery, precise positioning of the wrist transverse crease as a surface landmark, and precise positioning of the intersection of the wrist transverse crease centerline and the radial artery centerline based on this, combined with the same-body inch determined by four-finger structured light imaging. At the same time, the individualization of the same-body inch length is realized due to the individualization reflected by the different widths of the four fingers of each individual, thereby realizing the individualization of the Cun, Guan, and Chi positioning under the standardization of Cun, Guan, and Chi positioning. The method is simple, easy to use, and efficient, and ensures the accuracy of Cun, Guan, and Chi positioning.

[0068] In the technical solution described in this application, when a hand is placed on the mounting platform 5, the hand need only be placed within the field of view of the structured light projection device 1 and the imaging device 2. The structured light projection device 1 then sequentially projects multiple line structured light fringe bitmaps to perform line structured light scanning of the wrist. When the line structured light fringe patterns in a line structured light fringe bitmap align with the wrist's transverse wrist striae, the line structured light fringe patterns in the line structured light fringe image reflected from the wrist transverse wrist striae captured by the imaging device 2 are used as the wrist transverse wrist striae. Since the wrist is scanned by projecting line structured light stripes through the structured light projection device 1, the hand can be placed on the platform 5 at will, and the structured light projection device 1 automatically adapts to the position of the hand to determine the wrist stripes, without the need to specifically locate the position of the hand and the need to determine the wrist stripes by adapting the hand to the structured light projection device 1. Similarly, when another method of determining the wrist stripes is selected, when projecting the sequential surface structured light stripe bitmap onto the front of the palm and wrist, the hand can be placed on the platform 5 at will as long as it is within the field of view of the structured light projection device 1 and the camera device 2, and then the structured light projection device 1 projects the sequential surface structured light stripe bitmap onto the front of the palm and wrist. When projecting the line structured light stripe bitmap onto the four fingers from the index finger to the little finger that are put together, the hand can be placed on the platform 5 at will as long as it is within the field of view of the structured light projection device 1 and the camera device 2, and then the structured light projection device 1 sequentially projects multiple line structured light stripe bitmaps to perform line structured light scanning on the stripes on the middle section of the middle finger. When the line structured light stripes of a certain line structured light stripe bitmap are aligned with the horizontal lines of the middle segment of the middle finger, the camera device 2 captures the line structured light stripe image of the finger located by this line structured light stripe. The above method automatically adapts to the position of the hand through the operation of the structured light projection device 1, without requiring specific positioning of the hand placement. The hand does not need to adapt to the structured light projection device 1 to perform related operations. This frees the hand from constraints, and the requirements for the hand placement are relatively loose, allowing the patient's hand to be relaxed and comfortable, thereby improving the accuracy of pulse diagnosis and enhancing the user experience.

[0069] The radial artery Cun, Guan, and Chi positioning device and the method for positioning the Cun, Guan, and Chi of the present invention have a simple structure and are easy to operate. Using this device to perform the method for positioning the Cun, Guan, and Chi can simply, efficiently, and accurately position the radial artery and the Cun, Guan, and Chi parts, reduce restrictions on hand placement, and improve the accuracy of pulse diagnosis.

[0070] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments of equivalent changes using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. The implementation schemes in the above-mentioned embodiments can also be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above-mentioned embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. Radial artery Cun, Guan and Chi positioning device, characterized by: Including a mounting platform, a structured light projection device, a near-infrared light source, and a camera device, The mounting platform can transmit near-infrared light and is used to carry the hand or wrist to be measured. A near-infrared light source is located below the mounting platform and emits transmissive near-infrared light to irradiate the radial artery area or more of the wrist on the mounting platform, so that the radial artery absorbs the near-infrared light for imaging; The structured light projection device is located above the mounting platform and projects structured light onto the hand and wrist on the mounting platform to determine the position of the wrist crease and the length of the same body. The camera device is located above the mounting platform and captures the structured light image reflected by the hand and wrist or the transmitted near-infrared light image.

2. The radial artery Cun, Guan, and Chi positioning device according to claim 1, characterized in that: The structured light projection device can project line structured light and surface structured light bitmaps.

3. The radial artery Cun, Guan, and Chi positioning device according to claim 2, characterized in that: The structured light projection device projects a line structured light stripe pattern onto the horizontal line of the middle section of the middle finger and illuminates the four fingers together along the direction of the horizontal line; The structured light projection device projects a surface structured light pattern to illuminate the palm and wrist, or the structured light projection device projects a line structured light stripe pattern to illuminate the transverse wrist crease.

4. The radial artery Cun, Guan, and Chi positioning device according to claim 3, characterized in that: A cut-in near-infrared light filter is provided in front of the camera device to shield visible light from entering the camera device.

5. The radial artery Cun, Guan, and Chi positioning device according to claim 4, characterized in that: The placing table includes a table top that can transmit near-infrared light; or, when the placing table supports the hand, a position corresponding to the radial artery area is hollowed out.

6. The radial artery Cun, Guan, and Chi positioning device according to any one of claims 1 to 5, characterized in that: It also includes a computer and a display, which are connected to the camera device to display and process images.

7. A method for positioning Cun Guan Chi, characterized by: Using the radial artery Cun, Guan, and Chi positioning device according to any one of claims 1 to 6, Using a structured light projection device to project a surface structured light bitmap onto the palm and wrist on the mounting platform, capturing the image using a camera device, and processing to generate a wrist transverse crease depth image; or projecting a line structured light bitmap onto the wrist to generate a wrist transverse crease line structured light fringe image, and capturing the image using a camera device; Irradiating a wrist on a stage with near-infrared light and capturing a radial artery grayscale image with a camera; extracting a centerline of the wrist crease from a wrist crease depth image or a wrist crease structured light fringe image; and extracting a radial artery centerline from the radial artery grayscale image. Calculate the intersection point of the centerline of the wrist crease and the centerline of the radial artery; The distance from the intersection point along the radial artery toward the elbow is determined as the Cun section. The area from the intersection point along the radial artery to the elbow, from one body inch distance to two body inch distances, is defined as the joint. The interval from the intersection point along the radial artery to the elbow, which is two to three body lengths away, is defined as the radial part.

8. The method for positioning an inch ruler according to claim 7, characterized in that: A sequential surface structured light stripe bitmap is projected onto the front of the palm and wrist, and the reflected sequential surface structured light stripe image is captured by a camera device. A three-dimensional depth image of the palm and wrist is generated by a computer, and a Gaussian low-frequency filter is performed on the three-dimensional depth image. The height-sharp change boundary of the Gaussian low-frequency image is searched to generate a wrist fringe depth image to determine the wrist fringe; Alternatively, a line structured light stripe bitmap is projected onto the biological wrist transverse lines of the wrist to generate a wrist transverse line structured light stripe image to determine the wrist transverse lines.

9. The method for positioning an inch ruler according to claim 8, characterized in that: The centerline of the wrist transverse crease is extracted from the wrist transverse crease determined by the wrist transverse crease depth image or the wrist transverse crease structured light fringe image, and the points on the centerline are assigned a value of 255, and the other points are assigned a value of 0; the centerline of the radial artery is extracted from the radial artery grayscale image, and the points on the centerline are assigned a value of 255, and the other points are assigned a value of 0; the points assigned a value of 255 are traversed, and the position coordinate values ​​are compared. The points with the same position coordinate values ​​are the intersections of the centerline of the wrist transverse crease and the centerline of the radial artery.

10. The method for positioning an inch ruler according to any one of claims 7 to 9, characterized in that: A line structured light stripe bitmap is projected onto the four fingers from the index finger to the little finger that are put together. The line structured light stripe bitmap is horizontally aligned with the horizontal line of the middle section of the middle finger. The line structured light stripe image of the finger is collected. The horizontal length of the stripes on the four fingers at the horizontal line of the middle section of the middle finger in the above line structured light stripe image is used to calculate the length of three inches of the same body inch, and then determine the length of the same body inch.

Images