KR20230134828A - Method and apparatus for supporting editing of 3d tooth model - Google Patents

Abstract

Provides a method and device for supporting 3D tooth model editing. An editing support method according to an embodiment includes the steps of masking a masking area of a cross-sectional image included in a 3D tooth model using a graphic element, displaying a plurality of area control handles on the outline of the masking area, and , receiving a movement input for one or more area control handles among the plurality of area control handles from the user, and changing the masking area based on the movement input for the one or more area control handles. .

Description

3D tooth model editing method and device {METHOD AND APPARATUS FOR SUPPORTING EDITING OF 3D TOOTH MODEL}

The present invention relates to a method of editing a 3D tooth model. More specifically, it relates to an editing method and device that can conveniently support editing of a 3D tooth model.

Digital dentistry refers to digitizing and analyzing a patient's oral information. When establishing a treatment plan for orthodontic treatment using digital dentistry, an improved tooth arrangement can be reliably and conveniently predicted compared to the current dental condition. Additionally, when using a tooth model provided in a digital dentistry environment, teeth can be freely viewed in three dimensions, allowing various treatment plans to be established.

In a digital dentistry environment, a 3D tooth model in which the skeleton and teeth are realized in 3D is provided to the surgeon, and the surgeon can select a tooth to be treated using the 3D tooth model. Additionally, the surgeon can edit the 3D tooth model by coloring the teeth to be treated in the 3D tooth model.

However, in order for the operator to edit a specific tooth in a 3D tooth model, each 2D cross-sectional image that is the basis of the 3D tooth model must be edited. However, since the number of cross-sectional images consists of hundreds or more, there is an inconvenience in that for perfect editing, editing must be performed as many as the number of cross-sectional images. This editing method requires a lot of labor from the operator and also takes a lot of editing time.

Korean Patent Publication No. 10-2021-0100248 (published on August 17, 2021)

The technical problem to be solved by the present invention is to provide an editing method and device that supports editing of a 3D tooth model quickly and conveniently.

Another technical problem to be solved by the present invention is to provide an editing method and device that improves the efficiency of the operator's editing work.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

A 3D tooth model editing method according to an embodiment to solve the above technical problem includes the steps of masking a masking area of a cross-sectional image included in the 3D tooth model using a graphic element, and adding an outline of the masking area to the outline of the masking area. displaying a plurality of area control handles, receiving a movement input for one or more area control handles among the plurality of area control handles from a user, and based on the movement input of the one or more area control handles, performing the masking. It may include the step of changing the area.

In one embodiment, the step of displaying the plurality of area control handles includes calculating a curvature appearing at the outline of the masking area, and displaying the area control handle at a point where the calculated curvature is greater than or equal to a threshold value. It can be included.

In one embodiment, the masking area includes a first object, and the step of changing the masking area includes, when the size of the masking area is enlarged, the enlarged area includes a second object that is different from the first object. It may include determining whether a second object is included in the enlarged area as a result of the determination, and masking the second object using a graphic element different from the graphic element.

In one embodiment, the step of determining whether the enlarged area includes a second object different from the first object includes the difference between the first HU value of the masking area and the second HU value of the enlarged area. determining whether the first HU value and the second HU value are outside the threshold range, and if the difference between the first HU value and the second HU value is outside the threshold range, the enlarged area includes a second object that is different from the first object. It may include a step of determining that it has been done.

An editing support method according to another embodiment for solving the above technical problem includes displaying a cross-sectional image included in a three-dimensional tooth model, receiving input information at a point in the displayed cross-sectional image, Identifying an object including the point in the cross-sectional image, setting the identified object as a masking area, masking the set masking area using a graphic element, and a plurality of devices including the masking area. It may include the step of acquiring cross-sectional images, and using the graphic element to mask a masking area included in each of the obtained cross-sectional images using the graphic element.

An editing support method according to another embodiment for solving the above technical problem includes displaying a cross-sectional image included in a three-dimensional tooth model, receiving a line drawing input from the displayed cross-sectional image, and drawing the line Creating a specific area based on a drawing input, setting the generated specific area as a masking area, masking the set masking area using a graphic element, and forming a plurality of cross sections including the masking area. It may include acquiring images and masking a masking area included in each of the obtained cross-sectional images using the graphic element.

An editing device according to another embodiment for solving the technical problem includes one or more processors, a memory for loading a computer program executed by the processor, and storage for storing the computer program, The computer program includes an operation of masking a masking area of a cross-sectional image included in a 3D tooth model using a graphic element, an operation of displaying a plurality of area control handles on the outline of the masking area, and an operation of controlling the plurality of areas. Instructions for receiving a movement input for one or more area control handles among the control handles from the user and performing an operation for changing the masking area based on the movement input for the one or more area control handles. It can be included.

According to this embodiment, an editing tool that can conveniently edit a 3D tooth model is provided, allowing the operator to conveniently and quickly edit the 3D tooth model.

According to this embodiment, among the plurality of cross-sectional images included in the 3D tooth model, when one cross-sectional image is edited, the editing of other cross-sectional images is also processed at once, thereby saving the operator's labor and time in editing work. You can do it.

According to this embodiment, there is also the effect of minimizing editing errors by notifying the operator of the operator's incorrect edits or processing them so that they are not reflected in the 3D tooth model.

1 is a diagram illustrating a 3D tooth model editing system according to an embodiment of the present invention.
Figure 2 is a flowchart explaining a method of editing a 3D tooth model according to an embodiment of the present invention.
FIG. 3 is a flowchart specifically explaining step S130 of FIG. 2 for displaying a plurality of area control handles.
Figure 4 is a diagram showing a cross-sectional image displaying a plurality of area control handles.
FIG. 5 is a flowchart specifically explaining step S140 of FIG. 2 for changing the masking area.
Figures 6a and 6b are diagrams illustrating changes in the position of the area adjustment handle in a cross-sectional image.
Figure 7 is a diagram illustrating a state in which a plurality of objects are masked as different graphic elements.
Figure 8 is a diagram illustrating an editing result screen.
Figure 9 is an example diagram showing masked data using a cross-sectional image expressed in a 3D tooth model.
Figure 10 is a flowchart explaining a method of editing a 3D tooth model according to another embodiment of the present invention.
Figure 11 is a diagram illustrating a masking area being masked using a brush tool.
Figure 12 is a flowchart explaining a method of editing a 3D tooth model according to another embodiment of the present invention.
Figure 13 is a diagram illustrating a masking area being masked using a line drawing tool.
FIG. 14 is a hardware configuration diagram of the editing device described with reference to FIG. 1.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The advantages and features of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the technical idea of the present invention is not limited to the following embodiments and may be implemented in various different forms. The following examples are merely intended to complete the technical idea of the present invention and to be used in the technical field to which the present invention pertains. It is provided to fully inform those skilled in the art of the scope of the present invention, and the technical idea of the present invention is only defined by the scope of the claims.

In describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description will be omitted.

Hereinafter, several embodiments of the present invention will be described with reference to the drawings.

1 is a diagram illustrating an editing system, according to an embodiment of the present invention.

As shown in FIG. 1, the editing system according to this embodiment may include an image collection device 200 and an editing device 100, and the image collection device 200 and the editing device 100 are connected to a network 300. ) can communicate with each other.

The image collection device 200 can collect tooth scan data obtained by 3D scanning the patient's oral cavity, and can also capture and collect skeletal image data (CT image data). The image collection device 200 may collect tooth scan data from a 3D intraoral scanner, a model scanner, etc., and may collect skeletal image data from a CT (Computed Tomography) imaging device, etc. The tooth scan data may include a tooth image included in the upper jaw and a tooth image included in the lower jaw. In one embodiment, the image collection device 200 may match dental scan data and skeletal image data. At this time, the image collection device 200 may match tooth scan data and skeletal image data using the three-dimensional positions of a plurality of tooth feature points.

In one embodiment, the image collection device 200 may generate a three-dimensional tooth model based on tooth scan data matched with skeletal image data. Here, the 3D tooth model may include a plurality of cross-sectional images. Then, the image collection device 200 may provide a 3D tooth model including a plurality of cross-sectional images to the editing device 100. Each cross-sectional image may be assigned a sequence number. For example, if 600 cross-sectional images are included in a 3D tooth model, each cross-sectional image may be assigned a sequence number from 1 to 600.

The editing device 100 may be a computing device including one or more processors and memory. The editing device 100 may obtain a 3D tooth model from the image collection device 200 and provide an editing tool for editing the 3D tooth model. The editing device 100 can edit a 3D tooth model based on input information input through an editing tool.

In the editing support system shown in FIG. 1, the image collection device 200 and the editing device 100 are shown as physically separate devices. However, in some embodiments, the image collection device 200 and the editing device 100 are physically separated from each other. ) may be implemented in the form of a separate software module that runs through the same computing device.

Hereinafter, various embodiments of editing a 3D tooth model of the present invention will be described with reference to FIGS. 2 to 13.

Figure 2 is a flowchart explaining a method of editing a 3D tooth model according to an embodiment of the present invention.

Each step of the method shown in FIG. 2 may be performed by a computing device. In other words, each step of the method may be implemented as one or more instructions executed by a processor of a computing device. The first steps included in the method may be performed by a first computing device, and the second steps included in the method may be performed by a second computing device. In the following, the description will be continued assuming that each step of the present method is performed by the editing device 100 described with reference to FIG. 1. However, the performer of each step is only an example, and the present invention is not intended to be described in the following description. It is not limited by this, and for convenience of explanation, the description of some of the operating entities included in the method may be omitted.

Referring to FIG. 2, when a user (eg, surgeon) requests to edit a 3D tooth model, the editing device 100 may display a tooth cross section included in the 3D tooth model (S110). In one embodiment, when a request to edit a 3D tooth model is input, the editing device 100 may display a plurality of cross-sectional images, and among these, the cross-sectional image selected by the user may be enlarged and displayed.

Subsequently, the editing device 100 selects one of one or more objects included in the cross-sectional image according to a predetermined criterion or is selected by the user, and performs masking including the selected object or the object selected by the user. ) You can set the area. The editing device 100 may mask the set masking area using a first graphic element (S120).

In one embodiment, the object may be a structure such as a tooth, and the editing device 100 may identify the object in a cross-sectional image based on a Hounsfield Unit (HU) value. For example, the editing device 100 may identify an area with an HU value within a predetermined error range as one object. The masking area may be an area corresponding to a structure selected by the user.

Additionally, the editing device 100 may perform masking by selecting a first color as the first graphic element and filling the masking area with the first color. The editing device 100 may fill the masking area in a semi-transparent manner. Additionally, the editing device 100 may fill the masking area using a gradient method or a predetermined translucent pattern.

Next, the editing device 100 may identify the outline of the masking area and display a plurality of area adjustment handles on the outline (S130). The plurality of area adjustment handles may be displayed as predetermined graphic objects on the outline, and the user may adjust the masking area according to intention by inputting a user input for area adjustment. Hereinafter, the operation of displaying a plurality of area adjustment handles on the outline will be described in more detail with reference to FIGS. 3 and 4.

First, the editing device 100 identifies the outline of the masking area (S131). Identification of the outline may be performed using an algorithm based on image processing technology or may be performed using a machine-learned masking area identification model. For example, the editing device 100 inputs a feature vector extracted from an image of a tooth cross-section into the masking area identification model, and uses the data output from the masking area identification model to create an outline of the masking area. You will be able to decide.

The masking area identification model may be machine-learned using training data generated using the results of masking area adjustment through manipulation of the area adjustment handle, which will be described later. In this case, as the results of the user's masking area adjustment through the area adjustment handle are accumulated, the masking area identification model can be additionally machine learned, and as a result, the masking area identification model can more accurately determine the outline of the masking area. You can achieve certain effects.

Next, the editing device 100 may calculate the curvature for each position on the outline of the masking area (S132). Next, the area adjustment handle can be displayed at a position where the calculated curvature value is greater than or equal to the threshold (S133). At this time, the area adjustment handle may be displayed on the outline as a graphic object of the first shape.

Additionally, in some embodiments, the editing device 100 may display a designated number of area adjustment handles. At this time, the editing device 100 may select the curvature value as many as the number of area adjustment handles in order of increasing value, and then display the area adjustment handle at a position on the outline having the selected curvature value. At this time, the area adjustment handle may be displayed on the outline as a graphic object of a second shape.

Additionally, in some embodiments, the editing device 100 may display a plurality of area adjustment handles at predetermined intervals on the outline of the masking area (S133). At this time, the area adjustment handle may be displayed on the outline as a third-shaped graphic object.

In addition, in some embodiments, the positions of the plurality of region adjustment handles are machine-learned region adjustment handle position models using training data generated using attribute values of region adjustment handles where user input was input. It may have been decided by . At this time, the area adjustment handle may be displayed on the outline as a fourth-shaped graphic object. In this case, as the results of the user's masking area adjustment through the area adjustment handle are accumulated, the masking area identification model can be additionally machine learned, and as a result, the area adjustment handle is displayed only in locations with a high possibility of manipulation, Users will be able to quickly adjust the masking area with minimal manipulation.

As described above, it has been explained that the shapes of the plurality of area adjustment handles may vary from the first shape to the fourth shape depending on the positioning method of the area adjustment handles. As a result, the user will be able to intuitively understand how to determine the position of the area adjustment handle. However, in some embodiments, at least some of the first to fourth shapes may have the same shape to avoid visual complexity.

Referring again to FIG. 2, the editing device 100 receives position change input information for an area control handle from the user among a plurality of area control handles displayed on the outline of the masking area, and inputs the position change input information. The masking area can be changed based on (S140).

4 shows a masking area 10 and an area adjustment handle 10a. The area adjustment handle 10a is a control object that is subject to user input for adjusting the masking area 10. For example, if the position of the area adjustment handle 10a changes according to a dragging input to the area adjustment handle 10a, the masking area 10 may be adjusted to reflect the changed position of the area adjustment handle 10a. . Hereinafter, it will be described in detail with reference to FIG. 5.

FIG. 5 is a flowchart specifically explaining step S140 of FIG. 2 for changing the masking area.

The editing device 100 may receive position change input information for a specific area control handle from the user among a plurality of area control handles displayed on the outline of the masking area (S141). For example, the position change input information may include information about a dragging operation and information about an area adjustment handle that is the target of the dragging operation.

In some embodiments, the editing device 100 may receive position change information for two or more area adjustment handles. Additionally, in some embodiments, the editing device 100 may receive batch position change input information for all of the plurality of area adjustment handles.

For example, the user may be able to finely enlarge the masking area by inputting an area enlargement operation for all of the plurality of area control handles displayed on the outline.

Subsequently, the editing device 100 changes the position of the specific area control handle according to the received position change input information, and changes the outline of the masking area by connecting the repositioned area control handle and adjacent area control handles. (S142). That is, the editing device 100 may determine the adjusted masking area based on the area adjustment handle moved by the user and display the adjusted masking area.

In some embodiments, the editing device 100 may additionally display one or more new region adjustment handles as a result of adjusting the position of the region adjustment handles. In this case, the user will be able to more precisely adjust the masking area. The shape of the new area control handle may be different from the shape of the existing area control handle. As a result, the user will be able to intuitively understand that the masking area may need to be adjusted using the new area adjustment handle.

As illustrated in FIGS. 6A and 6B, among the area adjustment handles displayed in the masking area 10 in FIG. 6A, the area adjustment handle located at point 11a may be moved to point 11b in FIG. 6B. In this case, the editing device 100 can change the size of the masking area 20 as shown in FIG. 6B.

Meanwhile, the user can enter a selection input for a point on the outline of the masking area where the area control handle is not displayed. The selection input may be, for example, a click input. In this case, the editing device 100 creates and displays a new area control handle at the point selected by the user in response to the selection input, and controls the newly created area control handle to move according to the user's input. there is. When the newly created area control handle is moved, the editing device 100 may change the size of the masking area based on the moved area control handle.

Let's return to Figure 5 again for explanation. The editing device 100 may determine whether the masking area has been enlarged according to the movement of the area adjustment handle (S143).

If it is determined that the masking area is enlarged, the editing device 100 may determine whether another object is included in the enlarged masking area (S144). That is, the editing device 100 can determine whether the masking area enlarged according to the movement of the area control handle includes new objects in addition to the existing objects. For example, the other object may be an object of an adjacent tooth adjacent to the first tooth included in the masking area before enlargement. In other words, the other object may be understood as a new object that was not included in the masking area before enlargement.

In one embodiment, the editing device 100 compares the first HU value of the object included in the masking area before enlargement with the second HU value of the masking area after enlargement to determine whether other objects are included in the masking area after enlargement. can be judged.

In some embodiments, the editing device 100 may set the average of the HU values of the masked area before enlargement as the first HU value, and may also set the average of the HU values in the additionally enlarged area as the area control handle is moved. It can be set to the second HU value.

If the difference between the first HU value and the second HU value is outside a predetermined range, the editing device 100 may determine that the enlarged area does not include other objects, and the first HU value and the If the difference between the second HU values is within the predetermined range, it may be determined that another object is included in the enlarged masking area.

Subsequently, when other objects are included in the enlarged masking area, the editing device 100 may mask the other objects using a second graphic element while masking the existing object as a first graphic element. (S145). That is, the editing device 100 can mask a plurality of objects included in the enlarged area using different graphic elements.

In some embodiments, when another object is included in the masking area after enlargement, the editing device 100 may display masking for the other object using a second graphic element. That is, the editing device 100 masks and displays objects included in the masking area before enlargement and objects newly included in the masking area after enlargement using different graphic elements, allowing the user to re-confirm the enlargement operation of the masking area. It may be possible to induce Hereinafter, it will be described in more detail with reference to FIG. 7.

Figure 7 is a diagram illustrating a state in which a plurality of objects are masked as different graphic elements.

As illustrated in FIG. 7, the first object 21 is masked using a first graphic element, and the second object 22 is masked using a second graphic element. For example, when the masking area includes only the first object 21 before being expanded and is expanded to the area including the second object 22 by moving the area control handle, the second object 22 is changed to the first object. Masking can be done using graphic elements different from (21).

Meanwhile, in another embodiment, when other objects are included in the enlarged masking area, the editing device 100 may determine that the user has performed incorrect editing and may not perform masking processing on the other objects. Taking FIG. 7 as an example, the editing device 100 may not perform masking processing on the area corresponding to reference numeral 22.

The editing device 100 may display the first object and the second object visually differently in various ways. For example, the editing device 100 may color a first object with a first color and a second object with a second color. That is, the difference between the first graphic element and the second graphic element may be color.

Additionally, in some embodiments, the difference between the first graphic element and the second graphic element may be a method of filling the target area. For example, the first graphic element may fill the target area with first transparency, and the second graphic element may fill the target area with second transparency. Additionally, the first graphic element may fill the target area with a first pattern, and the second graphic element may fill the target area with a second pattern. Additionally, the first graphic element may fill the target area with a gradient in a first direction, and the second graphic element may fill the target area with a gradient in a second direction.

Meanwhile, if the masking area is reduced as a result of the determination in step S143, the editing device 100 masks the reduced masking area using the first graphic element, and the area excluded due to the reduction is masked with the first graphic element. Graphic elements can be removed (S146).

If, as a result of the determination in step S144, no other objects are included in the enlarged masking area, the editing device 100 may additionally mask the enlarged masking area using the first graphic element (S147).

Referring again to FIG. 2, the editing device 100 may acquire a plurality of cross-sectional images including a masking area from the 3D tooth model (S150). Next, the editing device 100 may identify a masking area in each obtained cross-sectional image and mask the masking area of each cross-sectional image using the first graphic element (S160).

According to this embodiment, the masking area can be conveniently changed by moving the area adjustment handle. Additionally, according to this embodiment, when an object included in a specific cross-sectional image is set as a masking area and is masked, objects included in other cross-sectional images can also be collectively masked. According to this batch masking process, the convenience and speed of editing can be improved compared to the existing method in which the user must mask each cross-sectional image one by one.

In some embodiments, the editing device 100 receives from the user a range of cross-sectional images to which a masking area is applied among all cross-sectional images, identifies a masking area in each cross-sectional image corresponding to the input range, and The masking area of each cross-sectional image can be masked using the first graphic element.

In some embodiments, the editing device 100 may display an editing result screen in which a plurality of cross-sectional images with masking areas displayed are arranged in order (i.e., sequence number). Additionally, the editing device 100 may display a three-dimensional tooth model including a masked area.

Figure 8 is a diagram illustrating an editing result screen.

As illustrated in FIG. 8 , the editing device 100 may provide the user with an editing result screen in which each masked cross-sectional image is arranged according to sequence number. Users can verify whether each cross-sectional image has been masked as intended by changing the page of the editing result screen.

Figure 9 is an example diagram showing masked data using a cross-sectional image expressed in a 3D tooth model, illustrating a specific tooth 30 that has been masked.

Figure 10 is a flowchart explaining a method for supporting editing of a 3D tooth model according to another embodiment of the present invention.

Referring to FIG. 10 , when a user (eg, surgeon) requests to edit a 3D tooth model, the editing device 100 may display a tooth cross section included in the 3D tooth model (S210). In one embodiment, when a request to edit a 3D tooth model is input, the editing device 100 may display a plurality of cross-sectional images, and among these, the cross-sectional image selected by the user may be displayed on the entire screen. .

Next, the editing device 100 may provide a brush tool to the user and receive input information from the user selecting one of one or more objects included in the cross-sectional image through the brush tool (S220).

Next, the editing device 100 may identify an object located at the point where the brush tool is selected and set the object as a masking area (S230). In one embodiment, the editing device 100 identifies the HU value of a point where a brush tool is selected, and selects an area that has an HU value within a threshold difference from the HU value within a range included in the selected point and a predetermined radius. identification, and the identified area can be identified as the object.

Next, the editing device 100 may process the masking area by displaying the first graphic element in the set masking area (S240).

Figure 11 is a diagram illustrating a masking area being masked using a brush tool.

As illustrated in FIG. 11 , when a user selects a specific point using the brush tool 41, the object corresponding to that point is set as the masking area 42 and can be masked with a specific color. The object corresponding to the selection point can be identified using the HU value. That is, an area having an HU value within a predetermined range based on the HU value of the selected point may be identified as the object.

Next, the editing device 100 may acquire a plurality of cross-sectional images including the masking area from the 3D tooth model (S250). Next, the editing device 100 may identify a masking area in each obtained cross-sectional image and mask the masking area included in each cross-sectional image using the first graphic element (S260). In some embodiments, the editing device 100 receives a range of cross-sectional images to which a masking area is applied from the user among all cross-sectional images, and selects a masking area included in each cross-sectional image corresponding to the input range. 1 Masking can be done using graphic elements.

In addition, the editing device 100 may display a three-dimensional tooth model (see FIG. 9) including a masked area, and may display a plurality of cross-sectional images showing the masking area in order (i.e., sequence number). An arranged editing result screen (see FIG. 8) can be displayed.

Figure 12 is a flowchart explaining a method for supporting editing of a 3D tooth model according to another embodiment of the present invention.

Referring to FIG. 12, when a user requests to edit a 3D tooth model, the editing device 100 may display a tooth cross section included in the 3D tooth model (S310). In one embodiment, when a request to edit a 3D tooth model is input, the editing device 100 may display a plurality of cross-sectional images, and among these, the cross-sectional image selected by the user may be displayed on the entire screen. .

Next, the editing device 100 may provide a line drawing tool to the user and receive a line drawing input from the user through the line drawing tool (S320).

Next, when the line drawing is completed, the editing device 100 may generate a closed curve based on the line input through the line drawing tool (S330). In one embodiment, the editing device 100 may generate a closed curve by connecting the first input point (ie, first point) and the last input point (ie, last point). The inner area of the closed curve may be a masking area. That is, the closed curve may be the outline of the masking area.

In one embodiment, the editing device 100 may adjust the masking area by correcting the closed curve. At this time, the editing device 100 may identify the HU values of pixels constituting the masking area and adjacent pixels of the closed curve. The adjacent pixels may be understood as pixels that are newly included when the masking area is expanded or contracted by a predetermined distance.

Next, the editing device 100 may determine a representative HU value of the masking area. For example, the representative HU value of the masking area may be the average HU value of the masking area or the HU value of the center point of the masking area.

Next, the editing device 100 may identify first adjacent pixels among the adjacent pixels whose HU value difference with the representative HU value of the masking area is within a predetermined range. Next, the editing device 100 may adjust the closed curve using the outline of the first area composed of the first adjacent pixels. For example, the editing device 100 may determine that the outline of the first area is a closed curve after adjustment.

Next, the editing device 100 may create a specific area within the closed curve and set a masking area based on the created area (S340). In one embodiment, the editing device 100 may set the generated closed curve to be the masking area.

Next, the editing device 100 may perform masking processing on the set masking area by displaying a first graphic element in the set masking area (S350).

Figure 13 is a diagram illustrating a masking area being masked using a line drawing tool.

As illustrated in FIG. 13 , when a user draws a line using the line drawing tool 51, a masking area 52 is set based on the line and can be masked with a specific color.

Next, the editing device 100 may acquire a plurality of cross-sectional images including the masking area from the 3D tooth model (S360). Next, the editing device 100 may identify the masking area in each obtained cross-sectional image and mask the masking area included in each cross-sectional image using the first graphic element (S370). In some embodiments, the editing device 100 receives a range of cross-sectional images to which a masking area is applied from the user among all cross-sectional images, and selects a masking area included in each cross-sectional image corresponding to the input range. 1 Masking can be done using graphic elements.

In addition, the editing device 100 may display a three-dimensional tooth model (see FIG. 9) including a masked area, and may display a plurality of cross-sectional images showing the masking area in order (i.e., sequence number). An arranged editing result screen (see FIG. 8) can be displayed.

Figure 14 is a hardware configuration diagram of the editing device 100. The editing device 100 includes one or more processors 1100, a system bus 1600, a communication interface 1200, and a memory 1400 that loads a computer program 1500 executed by the processor 1100, It may include a storage 1300 that stores a computer program 1500.

The processor 1100 controls the overall operation of each component of the image collection device 200. The processor 1100 may perform operations on at least one application or program to execute methods/operations according to various embodiments of the present invention. The memory 1400 stores various data, commands and/or information. The memory 1400 may load one or more computer programs 1500 from the storage 1300 to execute methods/operations according to various embodiments of the present invention. The bus 1600 provides communication functions between components of the image collection device 200. The communication interface 1200 supports Internet communication of the image collection device 200. Storage 1300 may non-temporarily store one or more computer programs 1500. The computer program 1500 may include one or more instructions implementing methods/operations according to various embodiments of the present invention. When the computer program 1500 is loaded into the memory 1400, the processor 1100 can perform methods/operations according to various embodiments of the present invention by executing the one or more instructions.

The computer program 1500 includes an operation of masking a masking area of a cross-sectional image included in a 3D tooth model using graphic elements, an operation of displaying a plurality of area adjustment handles on the outline of the masking area, and an operation of controlling a plurality of areas. It may include instructions for receiving a movement input for one or more area control handles from the user and performing an operation for changing the masking area based on the movement input for one or more area control handles. there is.

So far, various embodiments of the present invention and effects according to the embodiments have been mentioned with reference to FIGS. 1 to 14. The effects according to the technical idea of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below.

The technical idea of the present invention described so far can be implemented as computer-readable code on a computer-readable medium. The computer program recorded on the computer-readable recording medium can be transmitted to another computing device through a network such as the Internet, installed on the other computing device, and thus used on the other computing device.

Although operations are shown in the drawings in a specific order, it should not be understood that the operations must be performed in the specific order shown or sequential order or that all illustrated operations must be performed to obtain the desired results. In certain situations, multitasking and parallel processing may be advantageous. Although embodiments of the present invention have been described above with reference to the attached drawings, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical idea or essential features. I can understand that there is. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. The scope of protection of the present invention shall be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope shall be construed as being included in the scope of rights of the technical ideas defined by the present invention.

Claims (16)

A method for a computer device to edit a three-dimensional tooth model, comprising:
masking a masking area of the cross-sectional image included in the 3D tooth model using a graphic element;
displaying a plurality of area adjustment handles located on the outline of the masking area;
Receiving a movement input for one or more area control handles selected from the plurality of area control handles from the user; and
Including a step of changing the masking area by reflecting a movement input of the one or more area adjustment handles.
How to edit a 3D tooth model. According to paragraph 1,
The step of displaying the plurality of area control handles includes:
calculating a curvature appearing at the outline of the masking area; and
Including, displaying the area adjustment handle at a point where the calculated curvature is greater than or equal to a threshold value.
How to edit a 3D tooth model. According to paragraph 1,
The masking area includes a first object,
The step of changing the masking area is,
When the size of the masking area is enlarged, determining whether the enlarged area includes a second object different from the first object; and
If, as a result of the determination, a second object is included in the enlarged area, masking the second object using a graphic element different from the graphic element,
How to edit a 3D tooth model. According to paragraph 3,
The step of changing the masking area is,
If, as a result of the determination, the first object is included in the enlarged area, masking the enlarged area using the graphic element.
How to edit a 3D tooth model. According to paragraph 3,
The step of determining whether the enlarged area includes a second object different from the first object includes:
determining whether a difference between a first HU value of the masking area and a second HU value of the enlarged area is outside a threshold range; and
If the difference between the first HU value and the second HU value is outside the threshold range, determining that the enlarged area does not contain a second object that is different from the first object.
How to edit a 3D tooth model. According to paragraph 1,
After changing the masking area,
acquiring a plurality of cross-sectional images including the masking area; and
Further comprising: using the graphic element to mask a masking area included in each of the obtained cross-sectional images using the graphic element.
How to edit a 3D tooth model. According to clause 6,
The step of masking the masking area included in each obtained cross-sectional image using the graphic element,
Including, displaying an editing result screen in which a plurality of cross-sectional images displaying the masking area are arranged according to sequence numbers.
How to edit a 3D tooth model. According to paragraph 1,
The step of changing the masking area is,
When the size of the masking area is reduced, identifying an area excluded from the masking area according to the size reduction; and
Including, removing the graphic element displayed in the identified exclusion area.
How to edit a 3D tooth model. According to paragraph 1,
The graphic element is a preset color,
The step of masking using the graphic elements is,
Including; coloring the masking area with the color,
How to edit a 3D tooth model. A method for a computer device to edit a three-dimensional tooth model, comprising:
Displaying a cross-sectional image included in the three-dimensional tooth model;
Receiving input information at a point in the displayed cross-sectional image;
identifying an object including the point in the cross-sectional image;
Setting the identified object as a masking area and masking the set masking area using a graphic element;
acquiring a plurality of cross-sectional images including the masking area; and
Including, using the graphic element, masking a masking area included in each of the obtained cross-sectional images using the graphic element.
How to edit a 3D tooth model. According to clause 10,
The step of identifying the object in the cross-sectional image includes:
identifying the HU value of the point;
identifying an area having an HU value within a threshold difference from the HU value in an area included within a predetermined distance from the point; and
Including, identifying the identified area as the object.
How to edit a 3D tooth model. A method for a computer device to edit a three-dimensional tooth model, comprising:
Displaying a cross-sectional image included in the three-dimensional tooth model;
Receiving a line drawing input from the displayed cross-sectional image;
generating a specific area based on the line drawing input;
Setting the created specific area as a masking area and masking the set masking area using a graphic element;
acquiring a plurality of cross-sectional images including the masking area; and
Including, using the graphic element, masking a masking area included in each of the obtained cross-sectional images using the graphic element.
How to edit a 3D tooth model. According to clause 12,
The step of creating the specific area is,
Connecting the start and end points of the line drawing input to create a closed curve; and
Including, generating a specific area within the closed curve,
How to edit a 3D tooth model. According to clause 12,
The step of generating the closed curve is,
Identifying the HU value of the closed curve;
identifying an area having an HU value within a threshold difference from the HU value of the specific area within a range from the closed curve to a predetermined distance; and
Comprising: correcting the closed curve to match the outline of the identified area,
How to edit a 3D tooth model. According to clause 14,
The HU value of the specific area is the HU value of the center point of the specific area or the average of the HU values of the entire specific area,
How to edit a 3D tooth model. One or more processors;
a memory that loads a computer program executed by the processor; and
Including storage for storing the computer program,
The computer program is,
An operation of masking a masking area of a cross-sectional image included in a 3D tooth model using a graphic element;
An operation of displaying a plurality of area adjustment handles on the outline of the masking area;
Receiving a movement input for one or more area control handles among the plurality of area control handles from a user; and
Comprising instructions for performing an operation to change the masking area based on a movement input of the one or more area adjustment handles,
3D tooth model editing device.

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