KR102537144B1 - Head molding helmet design method, device and system using ray casting - Google Patents

Abstract

A device according to an embodiment acquires head photography information by photographing the user's head, and the user's 3D head model (M) can be created using the head photography information, and head correcting helmet information can be generated by applying a ray casting technique to the 3D head model (M).

Description

Head shape correction helmet design method, device and system using ray casting {HEAD MOLDING HELMET DESIGN METHOD, DEVICE AND SYSTEM USING RAY CASTING}

The following embodiments relate to a technology for designing a head correction helmet using a ray casting technique.

In the case of infants under the age of 18 months whose skull bones are not hardened, head deformity may occur due to congenital causes or a lying position. Severely deformed heads may not return to their original state, so head deformities must be corrected. A head correction helmet is one of the treatment methods applied to babies in need of head correction treatment, and is the most widely used treatment method for a deformed head.

However, the existing method of manufacturing a head correction helmet has problems in that it requires specialized personnel, is not easy to manufacture, and requires a lot of time and money.

Republic of Korea Patent Registration No. 10-0889240 (Announced on March 16, 2009) Republic of Korea Patent Registration No. 10-2323968 (2021.11.09 announcement) Republic of Korea Patent No. 10-1675400 (2016.11.11 announcement) Republic of Korea Patent Registration No. 10-2162027 (Announced on October 6, 2020)

Embodiments are intended to provide a method of designing a head correction helmet using a ray casting technique.

Embodiments attempt to determine endothelial information of a head correction helmet by radiating light to a user's 3D head model and identifying the location of a portion protruding from a reference ellipsoid in the user's head.

Embodiments attempt to determine the thickness of the fixing foam by radiating light to the user's 3D head model and identifying the location of the gap in the user's head.

According to one embodiment, a method performed by an apparatus includes obtaining head image information obtained by capturing a user's head; generating a 3D head model (M) of the user by using the head image capture information; A step of generating head correction helmet information by applying a ray casting technique to the 3D head model M may be included.

)를 확인하는 단계, 상기 기준 타원(T)과 상기 기준 높이(

)를 만족하는 타원체(I)를 생성하는 단계, 상기 타원체(I)와 상기 3D 머리 모델(M)을 중첩시킨 뒤, 제1 방향에서 가상의 빛을 조사하여 상기 조사된 빛이 상기 타원체(I)보다 상기 3D 머리 모델(M)에 먼저 만나는 지점을 헤드 노드로 설정하는 단계, 상기 헤드 노드 중 상기 진단 평면에 대해 상기 제1 방향에 위치한 노드를 부적합 노드로 설정하는 단계, 상기 기준 타원(T)의 원점(O)에서 상기 부적합 노드까지의 벡터(

)를 구하고, 상기 원점(O)에서 상기 벡터 방향으로 상기 타원체(I)와 만나는 지점까지의 거리(l)와 상기 원점(O)에서 상기 부적합 노드까지의 거리(

)의 비율을 생성하는 단계, 상기 비율을 이용하여 상기 타원체(I)의 제1 크기를 결정하는 단계, 상기 제1 크기에 미리 설정된 치료용 폼의 두께를 적용하여 상기 타원체(I)의 제2 크기를 결정하는 단계, 및 상기 타원체(I)의 제2 크기를 상기 두상 교정 헬멧의 내피 정보로 결정하는 단계를 포함할 수 있다.The generating of the head correction helmet information may include setting a diagnostic plane by cutting the 3D head model M based on a preset standard, and determining the largest among ellipses including the diagnostic plane and having a ratio of a minor axis to a major axis of 9:10. Generating a reference ellipse T of a small size, a reference height that is the distance to the 3D head model farthest from the diagnosis plane (

), the reference ellipse (T) and the reference height (

), generating an ellipsoid (I) that satisfies the ellipsoid (I) and the 3D head model (M), and then irradiating virtual light in a first direction so that the irradiated light is the ellipsoid (I) ), setting a point that meets the 3D head model (M) first as a head node, setting a node located in the first direction with respect to the diagnosis plane among the head nodes as an unsuitable node, A vector from the origin (O) of ) to the unsuitable node (

) is obtained, and the distance (l) from the origin (O) to the point where the vector direction meets the ellipsoid (I) and the distance from the origin (O) to the unsuitable node (

) Generating a ratio, determining a first size of the ellipsoid (I) using the ratio, applying a predetermined thickness of the treatment foam to the first size to determine the second size of the ellipsoid (I) The method may include determining a size, and determining a second size of the ellipsoid I as endothelial information of the head correction helmet.

The generating of the head correction helmet information may include displaying the helmet model (H) generated to satisfy the endothelial information and the 3D head model (M) by overlapping them based on the origin (O), the origin ( O) irradiating virtual light in the first direction, determining a node corresponding to a point where the light hits the 3D head model (M) and the helmet model (H) in order as a gap node, Calculating the thickness of the gap for each gap node using the 3D head model (M), the helmet model (H) and the thickness of the treatment foam, and foam for fixation based on the thickness of the gap for each gap node It may include determining the thickness of.

In the step of determining the thickness of the fixing foam, the thickness of the gap corresponding to the minimum value among the thicknesses of the gaps for each gap node is determined as the thickness of the fixing foam, and the foam for fixing is added according to the generated surplus gap In the first step, the thickness of the gap corresponding to the maximum value among the thicknesses of the gaps for each gap node is determined as the thickness of the fixing foam, and the part where the fixing foam exceeds the user's 3D head model (M) A second step of removing the fixing foam corresponding to , and providing gap information obtained by creating contour lines according to points corresponding to thickness values of similar gaps within a preset range for each gap node, and providing a terminal to a medical practitioner. and a third step of doing, and the thickness of the fixing foam may be determined by any one of the first to third steps.

)를 산출하는 단계, 상기 사용자의 목표 머리 둘레(

)를 수식 2를 사용하여 산출하는 단계, 미리 설정된 성장 지표를 이용하여, 상기 사용자 정보에 대응하는 백분위 수를 확인하는 단계, 및 상기 성장 지표, 상기 백분위 수 및 상기 목표 머리 둘레(

)를 이용하여 상기 사용자의 치료 예상 기간을 산출하는 단계를 포함하고, 상기 수식 2는,

일 수 있다.The method performed by the device, further comprising calculating an expected treatment period of the user when the user needs treatment, wherein the calculating of the expected treatment period comprises: Acquiring user information including information on the user's name, age, current head circumference and gender, the circumference t of the reference ellipse T and the circumference of the diagnosis plane (

) Calculating the target head circumference of the user (

) using Equation 2, checking the percentile corresponding to the user information using a preset growth index, and the growth index, the percentile, and the target head circumference (

) and calculating the expected treatment period of the user using Equation 2,

can be

An apparatus according to an embodiment may be combined with hardware and controlled by a computer program stored in a medium to execute any one of the methods described above.

Embodiments may provide a method of designing a head correction helmet using a ray casting technique.

According to the embodiments, information on the endothelium of the head correction helmet may be determined by radiating light to the user's 3D head model and identifying the location of a portion protruding from the reference ellipsoid in the user's head.

According to the embodiments, the thickness of the fixing foam may be determined by radiating light to the user's 3D head model to determine the location of the gap in the user's head.

1 is a diagram for explaining the configuration of a system according to an embodiment.
2 is a flowchart illustrating a process of designing a head correction helmet using a ray casting technique according to an embodiment.
3 is a diagram for explaining a process of determining whether a head is treated according to an embodiment.
4 is a flowchart illustrating a process of generating head correction helmet information according to an embodiment.
5 is a diagram for explaining a process of generating an ellipsoid I according to an embodiment.
6 is a diagram for explaining a process of setting an unsuitable node according to an exemplary embodiment.
7 is a diagram for explaining a process of calculating a distance l according to an exemplary embodiment.
8 is a flowchart illustrating a process of determining a thickness of a foam for fixing according to an embodiment.
9 is a flowchart illustrating a detailed process of determining the thickness of a fixing foam according to an embodiment.
10 is a flowchart illustrating a process of calculating an expected treatment period of a user according to an embodiment.
11 is a diagram illustrating growth indicators according to an embodiment.
12 is an exemplary diagram of a configuration of a device according to an embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, since various changes can be made to the embodiments, the scope of the patent application is not limited or limited by these embodiments. It should be understood that all changes, equivalents or substitutes to the embodiments are included within the scope of rights.

Specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only, and may be modified and implemented in various forms. Therefore, the embodiments are not limited to the specific disclosed form, and the scope of the present specification includes changes, equivalents, or substitutes included in the technical spirit.

Although terms such as first or second may be used to describe various components, such terms should only be construed for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element.

It should be understood that when an element is referred to as being “connected” to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle.

Terms used in the examples are used only for the purpose of explanation and should not be construed as limiting. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the embodiment belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

In addition, in the description with reference to the accompanying drawings, the same reference numerals are given to the same components regardless of reference numerals, and overlapping descriptions thereof will be omitted. In describing the embodiment, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the embodiment, the detailed description will be omitted.

The embodiments may be implemented in various types of products such as personal computers, laptop computers, tablet computers, smart phones, televisions, smart home appliances, intelligent vehicles, kiosks, and wearable devices.

1 is a diagram for explaining the configuration of a system according to an embodiment.

Referring to FIG. 1 , a system according to an embodiment may include a user terminal 10 and a device 30 capable of communicating with each other through a communication network.

First, a communication network may be configured regardless of its communication mode, such as wired or wireless, and may be implemented in various forms so that communication between servers and communication between servers and terminals is performed.

The user's terminal 10 may be a terminal used by a user who wishes to request the design of a head correcting helmet according to the present invention. The user's terminal 10 may be a desktop computer, a laptop computer, a tablet, a smart phone, or the like. For example, as shown in FIG. 1 , the user's terminal 10 may be a smart phone, and may be employed differently depending on the embodiment.

The user's terminal 10 may be configured to perform all or part of an arithmetic function, a storage/reference function, an input/output function, and a control function of a typical computer. The user's terminal 10 may be configured to communicate with the device 30 by wire or wireless.

The user's terminal 10 uses the device 30 to access a web page operated by a service provider or organization, or an application developed and distributed by a service provider or organization using the device 30 can be installed. The user's terminal 10 may be linked with the device 30 through a web page or application.

Singular expressions in the claims may be understood to include the plural. For example, a user in a claim may refer to one user or more than one user.

The apparatus 30 may generate head correction helmet information using a ray casting technique.

Here, the ray casting technique is generally called a ray projection method, and is a technique of projecting invisible light (Ray) in a virtual space to identify a surface that is hit by light.

The device 30 may be a server owned by a person or organization that provides services using the device 30, may be a cloud server, or may be a peer-to-peer (p2p) set of distributed nodes. may be The device 30 may be configured to perform all or part of an arithmetic function, a storage/reference function, an input/output function, and a control function of a typical computer.

The device 30 may be configured to communicate with the user's terminal 10 by wire or wirelessly, control the operation of the user's terminal 10, and control which information is to be displayed on the screen of the user's terminal 10. can do.

Meanwhile, for convenience of description, only the user's terminal 10 is shown in FIG. 1 , but the number of terminals may vary according to embodiments. As long as the processing capacity of the device 30 permits, the number of terminals is not particularly limited.

According to one embodiment, a database may be provided in the device 30, but is not limited thereto, and the database may be configured separately from the device 30. Apparatus 30 may include a number of artificial neural networks for performing machine learning algorithms.

2 is a flowchart illustrating a process of designing a head correction helmet using a ray casting technique according to an embodiment.

Referring to FIG. 2 , first, in step S201, the device 30 may acquire head image capturing information obtained by capturing a user's head.

According to an embodiment, the device 30 may obtain head image information obtained by capturing the user's head from a 3D scanner capable of scanning the user's head. In this case, the head photographing information may include information including the size, volume, shape, and angle of the user's head, but is not limited thereto.

In step S202, the device 30 may generate a 3D head model M of the user by using the head imaging information.

The apparatus 30 may generate a 3D head model M, which is a 3D model of the user's head, using head image information obtained by capturing the user's head.

Specifically, the apparatus 30 acquires data by utilizing data such as an RBG image, a depth image, and camera parameters of head photographing information, and uses the acquired data to obtain a 3D head model (a three-dimensional model of the user's head). M) can be created. In this case, the camera parameter may mean data containing pinhole camera structural information of the camera and position and direction information of the camera in a 3D space.

The device 30 may match the user's head photographing information and the user's 3D head model M to the user and store them in a database.

In step S203, the device 30 may generate head correction helmet information by applying a ray casting technique to the 3D head model. At this time, a detailed description of the process of generating head correction helmet information will be described later with reference to FIGS. 4 to 9 .

3 is a diagram for explaining a process of determining whether a head is treated according to an embodiment.

The device 30 may determine whether or not treatment of the user's head is required by using the user's head photographing information and the 3D head model M.

Referring to (1) of FIG. 3 , the device 30 may determine whether the user's head is brachycephalic by calculating a Cephalic index (CI) index using head image information and a 3D head model M. In this case, the short head may mean a head shape in which the entire back of the user's head is flat.

The device 30 may set a diagnostic plane cut from the user's 3D head model M based on a preset standard. In this case, the preset criterion may be set differently according to embodiments.

For example, when the preset criterion is the glabella, the apparatus 30 may set the diagnosis plane as a plane that horizontally cuts the 3D head model M based on the position of the glabellar on the user's face.

For another example, when the preset criterion is the ear, the device 30 may set the diagnosis plane as a plane that horizontally cuts the 3D head model M based on the position of the upper end point of the ear on the user's face.

The apparatus 30 may generate a reference ellipse T having the smallest size among ellipses having a minor axis to a major axis ratio of 9:10 including the diagnosis plane.

The device 30 may calculate the CI index by applying the maximum left-to-right length (ML) of the user's head and the maximum front-back length (AP) of the user's head to Equation (1) below.

이고, 장치(30)는 CI 지수가 90이상이면 사용자의 머리를 단두로 판정하고, CI 지수가 90 미만이면, 사용자의 머리를 단두가 아닌 것으로 판정할 수 있다.Equation (1) is

, the device 30 may determine that the user's head is brachycephalic if the CI index is 90 or more, and determine the user's head to be non-brachycephalic if the CI index is less than 90.

Referring to (2) of FIG. 3 , the device 30 may determine whether the user's head is quadriceps by calculating a cranial volume asymmetry index (CVAI) index using head imaging information and a 3D head model M. there is. At this time, the sadu may mean a head shape in which either the left or right side of the back part is flat or flat when the head is viewed from above.

The device 30 may calculate the CVAI index by applying the length of the long diagonal (Diagonal A) and the length of the short diagonal (Diagonal B) in the diagnosis plane of the user's head to Equation (2) below.

이고, 장치(30)는 CVAI 지수가 3.5이상이면 사용자의 머리를 사두로 판정하고, CVAI 지수가 3.5 미만이면, 사용자의 머리를 사두가 아닌 것으로 판정할 수 있다.Equation (2) is

, and the device 30 may determine that the user's head is a dead head if the CVAI index is 3.5 or more, and determine that the user's head is not a dead head if the CVAI index is less than 3.5.

According to an exemplary embodiment, the device 30 obtains the user's head imaging information and the 3D head model M, and determines whether the user's head is single-headed or quadrupedal based on the user's head-capturing information and the 3D head model M. can determine whether When the user's head is determined to be at least one of brachycephalic and quadrupedal, the device 30 determines that the user's head needs treatment, and generates head correction helmet information for a head correction helmet for treating the user's head. can do.

In this case, the head correction helmet information may include endothelial information, information on the thickness of the treatment foam, information on the thickness of the fixation foam, etc., but is not limited thereto.

4 is a flowchart illustrating a process of generating head correction helmet information according to an embodiment.

Referring to FIG. 4 , first, in step S401, the apparatus 30 may set a diagnostic plane cut from the 3D head model M based on a preset standard. In this case, the preset criterion may be set differently according to embodiments.

For example, when the preset criterion is the glabella, the apparatus 30 may set the diagnosis plane as a plane that horizontally cuts the 3D head model M based on the position of the glabellar on the user's face.

For another example, when the preset criterion is the ear, the device 30 may set the diagnosis plane as a plane that horizontally cuts the 3D head model M based on the position of the upper end point of the ear on the user's face.

In step S402, the apparatus 30 may generate a reference ellipse T having the smallest size among ellipses having a minor axis to a major axis ratio of 9:10 including the diagnosis plane.

The apparatus 30 may generate a reference ellipse T, which is the smallest ellipse among ellipses in which the ratio of the minor axis to the major axis is 9:10, including the diagnosis plane. In this case, the short axis of the reference ellipse (T) may include an axis corresponding to the maximum left-right length (ML) of the head in the diagnosis plane of the user, and the long axis of the reference ellipse (T) may include the maximum front-back length (AP) of the user's head. ) may include the corresponding axis.

The device 30 includes a reference including a shortening of the reference ellipse T including an axis corresponding to the maximum left-right length (ML) of the head in the diagnosis plane of the user and an axis corresponding to the maximum front-to-back length (AP) of the user's head. The ratio of the long axis of the ellipse T may be set to a ratio of 9:10, which is generally set as the ratio of the left and right and the front and rear of the ideal head.

)를 확인할 수 있다.In step S403, the device 30 determines the reference height (the distance from the diagnosis plane to the 3D head model farthest away).

) can be checked.

)를 확인할 수 있다. According to one embodiment, referring to FIG. 5, the device 30 sets a point where the minor axis and the major axis of the reference ellipse T intersect with coordinates on the x, y, and z axes of (0,0,0) is placed at the origin (O), and the reference height corresponding to the maximum y value from the diagnosis plane (

) can be checked.

)를 만족하는 타원체(I)를 생성할 수 있다. 이때, 타원체(I)를 생성하는 과정에 대한 자세한 설명은 도 5를 참조하여 후술하기로 한다.In step S404, the device 30 determines the reference ellipse (T) and the reference height (

) can be generated. At this time, a detailed description of the process of generating the ellipsoid I will be described later with reference to FIG. 5 .

In step S405, the apparatus 30 superimposes the ellipsoid I and the 3D head model M, and then irradiates virtual light in the first direction so that the irradiated light is larger than the 3D head model M. You can set the first meeting point to the head node. In this case, the first direction may mean a direction in which the value of the y-axis is greater than 0.

)의 값보다 큰 지점에서 타원체(I)와 3D 머리 모델(M)을 향해 가상의 빛을 조사할 수 있다. 장치(30)는 조사된 빛이 먼저 만나는 지점이 타원체(I) 및 3D 머리 모델(M) 중에서 어떤 것인지 여부를 판단할 수 있으며, 조사된 빛이 타원체(I)보다 3D 머리 모델(M)에 먼저 만나는 지점을 헤드 노드로 설정하고, 조사된 빛이 3D 머리 모델(M)보다 타원체(I)에 먼저 만나는 지점을 헬멧 노드로 설정할 수 있다.According to one embodiment, while the device 30 corresponds to the y-axis, the value of the y-axis is the reference height (

), virtual light may be irradiated toward the ellipsoid (I) and the 3D head model (M) at a point greater than the value of . The apparatus 30 may determine whether a point at which the radiated light first meets is one of the ellipsoid I and the 3D head model M, and the radiated light is closer to the 3D head model M than the ellipsoid I. A point where the irradiated light first meets the ellipsoid (I) rather than the 3D head model (M) may be set as the helmet node.

In step S406, the apparatus 30 may set a node located in the first direction with respect to the diagnosis plane among head nodes as an unsuitable node. At this time, a detailed description of the process of setting the head node and the inappropriate node will be described later with reference to FIG. 6 .

That is, the device 30 overlaps the ellipsoid I and the 3D head model M, then irradiates virtual light to the ellipsoid I and the 3D head model M, and the irradiated light is applied to the 3D head model ( By setting the first meeting point of M) as an unsuitable node, it is possible to determine the part where the user's head protrudes from the ellipsoid I by using a ray casting technique.

According to an embodiment, the device 30 may set a node having a value corresponding to the y-axis greater than 0 among head nodes as an unsuitable node.

)를 구하고, 원점(O)에서 벡터(

) 방향으로 타원체(I)와 만나는 지점까지의 거리(l)와 원점(O)에서 부적합 노드까지의 거리(

)의 비율

을 생성할 수 있다. 이때, 비율

을 생성하는 과정에 대한 자세한 설명은 도 7을 참조하여 후술하기로 한다.In step S407, the device 30 provides a vector from the origin (O) of the reference ellipse (T) to the unsuitable node (

) is obtained, and the vector (

), the distance (l) to the point where it meets the ellipsoid (I) and the distance from the origin (O) to the non-conforming node (

) ratio

can create At this time, the ratio

A detailed description of the process of generating will be described later with reference to FIG. 7 .

을 이용하여 타원체(I)의 제1 크기를 결정할 수 있다. 장치(30)는 부적합 노드 별로 생성된 비율

중 최소 값에 해당하는 비율

을 이용하여 타원체(I)의 제1 크기를 결정할 수 있다. 이때, 장치(30)는 부적합 노드 별로 생성된 비율

중 최소 값에 해당하는 비율

에 비례하여 타원체(I)의 제1 크기를 결정할 수 있다.In step S408, the device 30 determines the ratio

It is possible to determine the first size of the ellipsoid (I) by using. Device 30 is a ratio generated for each non-conforming node

The proportion corresponding to the minimum value of

It is possible to determine the first size of the ellipsoid (I) by using. At this time, the device 30 generates a ratio for each unsuitable node.

The proportion corresponding to the minimum value of

It is possible to determine the first size of the ellipsoid I in proportion to .

In step S409, the device 30 may determine the second size of the ellipsoid I by applying the preset thickness of the treatment foam to the first size. At this time, the thickness of the pre-set therapeutic foam may be set differently according to the embodiment. For example, the thickness of the pre-set treatment foam may be set to 3 mm to 6 mm.

According to one embodiment, the device 30 may increase the size of the ellipsoid (I) by the thickness of the treatment foam set in advance to the first size. For example, when the thickness of the pre-set therapeutic foam is 5 mm, the device 30 may increase the size of the ellipsoid I by 5 mm to the first size.

In step S410, the device 30 may determine the second size of the ellipsoid I as endothelial information of the head correction helmet.

5 is a diagram for explaining a process of generating an ellipsoid I according to an embodiment.

The device 30 may set a diagnostic plane cut from the user's 3D head model M based on a preset standard. In this case, the preset criterion may be set differently according to embodiments.

For example, when the preset criterion is the glabella, the apparatus 30 may set the diagnosis plane as a plane that horizontally cuts the 3D head model M based on the position of the glabellar on the user's face.

For another example, when the preset criterion is the ear, the device 30 may set the diagnosis plane as a plane that horizontally cuts the 3D head model M based on the position of the upper end point of the ear on the user's face.

The apparatus 30 may generate a reference ellipse T having the smallest size among ellipses having a minor axis to a major axis ratio of 9:10 including the diagnosis plane.

)를 만족하는 타원체(I)를 생성할 수 있다. 예를 들어, 반구(A)의 반지름 R은 0.5로 설정될 수 있다. 이때, scale transformation(S) 함수는 구로부터 타원체를 생성하는 함수를 의미할 수 있다.According to one embodiment, the apparatus 30 is a reference ellipse (T) and a reference height (from the hemisphere (A) whose radius is set to R through a scale transformation (S) function on the x-axis, y-axis, and z-axis)

) can be generated. For example, the radius R of the hemisphere A may be set to 0.5. In this case, the scale transformation (S) function may mean a function for generating an ellipsoid from a sphere.

)인 반구의 형상을 가지는 타원체를 의미할 수 있다.At this time, the base of the ellipsoid (I) is the reference ellipse (T), and the height is the reference height (

) may mean an ellipsoid having the shape of a hemisphere.

6 is a diagram for explaining a process of setting an unsuitable node according to an exemplary embodiment.

The device 30 overlaps the ellipsoid (I) and the 3D head model (M), and then irradiates virtual light in the first direction to determine the point where the irradiated light meets the 3D head model (M) first than the ellipsoid (I) can be set as the head node. In this case, the first direction may mean a direction in which the value of the y-axis is greater than 0.

)의 값보다 큰 지점에서 타원체(I)와 3D 머리 모델(M)을 향해 가상의 빛을 조사할 수 있다. 장치(30)는 조사된 빛이 먼저 만나는 지점이 타원체(I) 및 3D 머리 모델(M) 중에서 어떤 것인지 여부를 판단할 수 있으며, 조사된 빛이 타원체(I)보다 3D 머리 모델(M)에 먼저 만나는 지점을 헤드 노드로 설정하고, 조사된 빛이 3D 머리 모델(M)보다 타원체(I)에 먼저 만나는 지점을 헬멧 노드로 설정할 수 있다.According to one embodiment, while the device 30 corresponds to the y-axis, the value of the y-axis is the reference height (

), virtual light may be irradiated toward the ellipsoid (I) and the 3D head model (M) at a point greater than the value of . The apparatus 30 may determine whether a point at which the radiated light first meets is one of the ellipsoid I and the 3D head model M, and the radiated light is closer to the 3D head model M than the ellipsoid I. A point where the irradiated light first meets the ellipsoid (I) rather than the 3D head model (M) may be set as the helmet node.

The device 30 may set a node located in the first direction with respect to the diagnosis plane among head nodes as an unsuitable node. At this time, a detailed description of the process of setting the head node and the inappropriate node will be described later with reference to FIG. 6 .

That is, after overlapping the ellipsoid I and the 3D head model M, the device 30 irradiates virtual light to the ellipsoid I and the 3D head model M, and identifies a point where the irradiated light first meets. By setting it as an unsuitable node, it is possible to determine the part where the user's head protrudes from the ellipsoid I by using a ray casting technique.

According to an embodiment, the device 30 may set a node having a value corresponding to the y-axis greater than 0 among head nodes as an unsuitable node.

7 is a diagram for explaining a process of calculating a distance l according to an exemplary embodiment.

)를 구하고, 원점(O)에서 벡터 방향으로 타원체(I)와 만나는 지점까지의 거리(l)를 아래와 같은 수식 1을 풀이하여 구할 수 있다. 이때, 수식 1은

이고, 장치(30)는 수식 1을 풀이하여 거리(l)을 산출할 수 있다. 여기서,

은 scale transformation(S)의 역함수이고,

은 원점(O)에서 벡터(

) 방향으로 타원체(I)와 만나는 지점까지의 거리(l)와 원점(O)에서 부적합 노드까지의 거리(

)의 비율

을 의미하고, R은 반구(A)의 반지름을 의미할 수 있다. 예를 들어, R은 0.5로 설정될 수 있다.The device 30 is a vector from the origin O of the reference ellipse T to the nonconforming node

) is obtained, and the distance (l) from the origin (O) to the point where the vector direction meets the ellipsoid (I) can be obtained by solving Equation 1 below. At this time, Equation 1 is

, and the device 30 can calculate the distance l by solving Equation 1. here,

is the inverse function of scale transformation (S),

is a vector from the origin (O) (

), the distance (l) to the point where it meets the ellipsoid (I) and the distance from the origin (O) to the non-conforming node (

) ratio

, and R may mean the radius of the hemisphere (A). For example, R can be set to 0.5.

8 is a flowchart illustrating a process of determining a thickness of a foam for fixing according to an embodiment.

Referring to FIG. 8 , first, in step S801, the device 30 may overlap and display a helmet model H and a 3D head model M generated to satisfy endothelial information based on the origin O. .

In step S802, the device 30 may emit virtual light from the origin O in a first direction.

According to one embodiment, the device 30 may emit virtual light from the origin toward the helmet model H and the 3D head model M in a first direction in which the value of the y-axis is greater than 0.

In step S803, the apparatus 30 may determine a node corresponding to a point where light hits the 3D head model M and the helmet model H in that order as a gap node.

The apparatus 30 may determine a node corresponding to a point at which the radiated light hits the 3D head model M and the helmet model H in that order, and determine the corresponding node as a gap node.

In step S804, the apparatus 30 may calculate the thickness of the gap for each gap node using the 3D head model M, the helmet model H, and the thickness of the treatment foam.

According to one embodiment, the apparatus 30 determines the thickness of the gap for each gap node, which is a value obtained by subtracting the thickness of the pre-set therapeutic foam from the distance between the 3D head model (M) and the helmet model (H) of the light irradiated in step S802. can be calculated.

That is, the device 30 overlaps the helmet model H and the 3D head model M based on the origin O, and then creates a virtual image of the helmet model H and the 3D head model M from the origin O. By irradiating the light of , checking the node corresponding to the point where the irradiated light hits the 3D head model (M) and the helmet model (H) in order, and setting the corresponding node as a gap node, ray casting ) technique, it is possible to determine whether a gap exists between the user's 3D head model (M) and the helmet model (H).

In step S805, the device 30 may determine the thickness of the fixing foam based on the thickness of the gap for each gap node. At this time, a detailed description of the process of determining the thickness of the fixing foam will be described later with reference to FIG. 9 .

The apparatus 30 determines the thickness of the foam for fixation based on the thickness of the gap for each gap node, so that when there is a gap between the user's head and the head correction helmet, the thickness of the foam for fixation is determined according to the thickness of the gap. Thus, when the user wears the head correction helmet, information on the head correction helmet can be generated to prevent twisting and facilitate fixation.

9 is a flowchart illustrating a detailed process of determining the thickness of a fixing foam according to an embodiment.

Referring to FIG. 9, first, in step S901, the apparatus 30 determines the thickness of the gap corresponding to the minimum value among the thicknesses of the gaps for each gap node as the thickness of the fixing foam, and according to the generated surplus gap, You can perform the first step of adding a form. Here, the excess gap is created between the helmet model (H) and the 3D head model (M) and between the fixing foam when the thickness of the gap corresponding to the minimum value among the thicknesses of the gaps for each gap node is determined as the thickness of the fixing foam can mean gaps.

In step S902, the apparatus 30 determines the thickness of the gap corresponding to the maximum value among the thicknesses of the gaps for each gap node as the thickness of the fixing foam, and determines the part where the fixing foam exceeds the user's 3D head model (M). A second step of removing the fixing foam corresponding to may be performed.

In step S903, the device 30 performs a third step of providing, to the medical practitioner's terminal, information on the gap where contour lines are generated according to points corresponding to thickness values of similar gaps for each gap node whose thickness falls within a preset range. can do.

In this case, the terminal of the medical person may be a terminal used by a medical expert such as a doctor. The medical personnel's terminal may be a desktop computer, a laptop computer, a tablet computer, a smart phone, and the like. For example, the medical personnel's terminal may be a smart phone, and may be employed differently according to embodiments.

The medical personnel's terminal may be configured to perform all or part of an arithmetic function, a storage/reference function, an input/output function, and a control function of a normal computer. The medical personnel's terminal may be configured to communicate with the device 30 in a wired or wireless manner.

The medical personnel's terminal uses the device 30 to access a web page operated by a service provider or organization, or an application developed and distributed by a service provider or organization using the device 30 is installed. can The medical personnel's terminal may be linked with the device 30 through a web page or application.

At this time, the thickness of the fixing foam may be determined by any one of the first to third steps.

According to the present invention, the device 30 uses a ray casting technique to generate head correction helmet information including information on the inner skin of the head correction helmet, information on the thickness of the treatment foam, and information on the thickness of the fixation foam. By creating, compared to the method of figuring out the shape of the user's head by casting a plaster or taking a CT scan, and adjusting the size of the head correction helmet individually by experts or medical personnel, head correction helmet information can be created in a relatively simple and accurate way. In addition, it is possible to provide a head correction helmet design method using ray casting, which has the effect of saving time and money.

10 is a flowchart illustrating a process of calculating an expected treatment period of a user according to an embodiment, and FIG. 11 is a diagram showing growth indicators according to an embodiment.

Referring to FIG. 10 , first, in step S1001, the device 30 may obtain user information from the terminal 10 of the user. In this case, the user information may include information about the user's name, age, current head circumference, and gender, but is not limited thereto.

)를 산출할 수 있다.In step S1002, the device 30 determines the circumference t of the reference ellipse T and the circumference of the diagnostic plane (

) can be calculated.

)를 수식 2를 사용하여 산출할 수 있다.In step S1003, the device 30 targets the user's head circumference (

) can be calculated using Equation 2.

)를 구하고, 사용자의 목표 머리 둘레(

)를 수식 2를 풀이하여 구할 수 있다. 이때, 수식 2는 수식 2는

이고, 장치(30)는 수식 2를 풀이하여 사용자의 목표 머리 둘레(

)를 산출할 수 있다. 수식 2에서 2는 미리 설정된 실제 임상 상의 보정 수치를 의미할 수 있으며, 실시예에 따라 상이하게 설정될 수 있다.That is, the device 30 has a circumference t of the reference ellipse T and a circumference of the diagnostic plane (

), and the user's target head circumference (

) can be obtained by solving Equation 2. At this time, Equation 2 is Equation 2 is

, and the device 30 solves Equation 2 to target the user's head circumference (

) can be calculated. In Equation 2, 2 may mean a preset actual clinical image correction value, and may be set differently according to embodiments.

In step S1004, the device 30 may check a percentile corresponding to user information using a preset growth index.

At this time, the database of the device 30 may store a growth index including information about the head circumference according to the user's age and percentile.

The growth index shown in FIG. 11 is a growth index published by the World Health Organization (WHO).

In this case, the growth index shown in (1) of FIG. 11 may include information about the head circumference according to the user's age and percentile when the user's gender is male, and shown in (2) of FIG. The growth index may include information about the head circumference according to the user's age and percentile when the user's gender is female.

For example, if the user's gender in the user information is male, the user's age is 3 weeks, and the user's current head circumference is 36.5 cm, the device 30 determines the 50th percentile of the user from the growth index stored in the database. can be checked with

)를 이용하여 사용자의 치료 예상 기간을 산출할 수 있다.In step S1005, the device 30 determines the growth index, percentile and target head circumference (

) can be used to calculate the expected treatment period of the user.

)가 38cm인 경우, 백분위 수가 50th인 사용자의 머리 둘레가 38cm에 도달하는 시점인 7주를 성장 지표로부터 추출할 수 있다.For example, the device 30 determines that the user's gender in the user information is male, the user's age is 3 weeks, the user's percentile is the 50th, and the target head circumference calculated in step S1003 (

) is 38 cm, 7 weeks, when the head circumference of the 50th percentile user reaches 38 cm, can be extracted from the growth index.

)에 도달하는 시점이 7주이므로, 사용자의 치료 예상 기간을 4주로 산출할 수 있다.The device 30 determines that the current user's age is 3 weeks and the user's target head circumference (

) is reached at 7 weeks, the user's expected treatment period can be calculated as 4 weeks.

12 is an exemplary diagram of a configuration of a device 30 according to an embodiment.

Device 30 according to one embodiment includes a processor 31 and a memory 32 . Device 30 according to an embodiment may be the above-described server or terminal. The processor 31 may include at least one device described above with reference to FIGS. 1 to 11 or may perform at least one method described above with reference to FIGS. 1 to 11 . The memory 32 may store information related to the above method or store a program in which the above method is implemented. Memory 32 may be volatile memory or non-volatile memory.

The processor 31 may execute a program and control the device 30 . Program codes executed by the processor 31 may be stored in the memory 32 . The device 30 may be connected to an external device (eg, a personal computer or network) through an input/output device (not shown) and exchange data.

The embodiments described above may be implemented as hardware components, software components, and/or a combination of hardware components and software components. For example, the devices, methods and components described in the embodiments may include, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate (FPGA). array), programmable logic units (PLUs), microprocessors, or any other device capable of executing and responding to instructions. A processing device may run an operating system (OS) and one or more software applications running on the operating system. A processing device may also access, store, manipulate, process, and generate data in response to execution of software. For convenience of understanding, there are cases in which one processing device is used, but those skilled in the art will understand that the processing device includes a plurality of processing elements and/or a plurality of types of processing elements. It can be seen that it can include. For example, a processing device may include a plurality of processors or a processor and a controller. Other processing configurations are also possible, such as parallel processors.

The method according to the embodiment may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program commands recorded on the medium may be specially designed and configured for the embodiment or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. - includes hardware devices specially configured to store and execute program instructions, such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language codes that can be executed by a computer using an interpreter, as well as machine language codes such as those produced by a compiler. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

Software may include a computer program, code, instructions, or a combination of one or more of the foregoing, which configures a processing device to operate as desired or processes independently or collectively. You can command the device. Software and/or data may be any tangible machine, component, physical device, virtual equipment, computer storage medium or device, intended to be interpreted by or provide instructions or data to a processing device. , or may be permanently or temporarily embodied in a transmitted signal wave. Software may be distributed on networked computer systems and stored or executed in a distributed manner. Software and data may be stored on one or more computer readable media.

As described above, although the embodiments have been described with limited drawings, those skilled in the art can apply various technical modifications and variations based on the above. For example, the described techniques may be performed in an order different from the method described, and/or components of the described system, structure, device, circuit, etc. may be combined or combined in a different form than the method described, or other components may be used. Or even if it is replaced or substituted by equivalents, appropriate results can be achieved.

Therefore, other implementations, other embodiments, and equivalents of the claims are within the scope of the following claims.

Claims (3)

In the method performed by the device,
acquiring head photographing information in which a user's head is photographed;
generating a 3D head model (M) of the user by using the head image capture information;
Generating head correction helmet information by applying a ray casting technique to the 3D head model (M);
The step of generating the head correction helmet information,
Setting a diagnostic plane cut from the 3D head model (M) based on a preset standard;
Generating a reference ellipse (T) of the smallest size among ellipses having a minor axis and a major axis ratio of 9:10 including the diagnosis plane;
Reference height, which is the distance to the 3D head model farthest from the diagnosis plane (

),
The reference ellipse (T) and the reference height (

) Generating an ellipsoid (I) that satisfies
After overlapping the ellipsoid (I) and the 3D head model (M), a virtual light is irradiated in a first direction, and the irradiated light meets the 3D head model (M) first than the ellipsoid (I) Setting as a head node,
setting a node located in the first direction with respect to the diagnosis plane among the head nodes as an unsuitable node;
A vector from the origin (O) of the reference ellipse (T) to the unsuitable node (

) is obtained, and the distance (l) from the origin (O) to the point where the vector direction meets the ellipsoid (I) and the distance from the origin (O) to the unsuitable node (

) generating a ratio of
Determining a first size of the ellipsoid (I) using the ratio;
Determining a second size of the ellipsoid (I) by applying a thickness of a foam for treatment set in advance to the first size, and
Determining the second size of the ellipsoid (I) as endothelial information of the head correction helmet,
A method for designing a head correction helmet using ray casting. delete According to claim 1,
The step of generating the head correction helmet information,
overlapping and displaying a helmet model (H) generated to satisfy the endothelial information and the 3D head model (M) based on the origin (O);
Irradiating virtual light in the first direction from the origin (O);
Determining a node corresponding to a point where the light hits the 3D head model (M) and the helmet model (H) in that order as a gap node;
Calculating the thickness of the gap for each gap node using the thickness of the 3D head model (M), the helmet model (H), and the treatment foam; and
Determining the thickness of the fixing foam based on the thickness of the gap for each gap node
A method for designing a head correction helmet using ray casting.

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