KR102599391B1 - Apparatus and method for generating artifact drawings based on 3d scan data - Google Patents

Abstract

The present invention relates to an apparatus and method for generating a drawing of an artifact based on 3D scan data, the device comprising: a 3D scanning unit that acquires 3D data through 3D scanning of an original artifact; a region division unit that performs region division on the 3D data based on a user-defined viewpoint vector and cutting plane; A line detection unit that acquires a 2D artifact image based on area information divided from the 3D data and extracts an outline and a cross-sectional line; a dimension measuring unit that measures thickness and length values at a designated location of the 3D data as dimension values; and a drawing generator that generates a drawing of the original artifact by matching the outline or section line extracted from the 3D data and modifying and adjusting the shape, thickness, and length of the designated location.

Description

Apparatus and method for generating artifact drawings based on 3D scan data {APPARATUS AND METHOD FOR GENERATING ARTIFACT DRAWINGS BASED ON 3D SCAN DATA}

The present invention relates to artifact drawing technology, and more specifically, to a 3D scan data-based artifact drawing generation device and method that can generate digital drawing data by analyzing and visualizing the size, shape, and surface of the artifact based on 3D scan data of the artifact. It's about.

Cultural assets (hereinafter referred to as 'relics') are various types of items made and used by our distant ancestors that have been discovered or excavated in the present, and are very valuable and have historical value that can provide insight into the environment and culture in which our ancestors lived. It's a thing.

Since the number and type of these relics remaining to this day are relatively rare, their historical value, preciousness, and rarity are generally evaluated more highly over time, and the lifestyle, wisdom, and experience of our ancestors can be inferred, and necessary research and In order to proceed with learning, preservation, restoration, and reproduction of the relevant relics are relatively important. To preserve and restore the relics, first, confirm the external shape and dimensions of each part and draw the confirmed results. This is comparatively very important.

In other words, due to the historical, cultural, artistic, and religious value of the relic, as well as its scarcity, it must be possible to reproduce it in order to promote conservation, restoration, research, and exhibition while minimizing damage to the original. It is absolutely necessary to check (measure) the dimensions of the part and draw it up.

One embodiment of the prior art for drawing valuable and rare artifacts is to arrange and fix the artifacts on a specific table in various ways, observe them with the naked eye, and draw and draw the external shape, including the curvature, by hand. This is a method of measuring the thickness and length of each part using various measuring tools such as calipers and dividers, and then recording the corresponding outline, dimensions, and cross-section on the drawing.

In this prior art, it is difficult to align artifacts that are partially damaged and incomplete, and there is a relatively large difference in accuracy, time, and precision in drawing artifacts depending on the skill level of the drawing operator.

Therefore, even for ordinary, unskilled workers, there is a need to develop techniques to measure and draw the external appearance of artifacts and the dimensions of each part in a relatively accurate and precise but easy manner.

In addition, by preserving the original form of the three-dimensional artifact and installing it in an aligned state without damaging it, an unskilled person can quickly and easily measure the overall external shape, including the thickness and dimensions of each part, and the dimensions of each part, draw the shape, and draw the drawing. There is a need to develop technology that can manually reinforce the shape of necessary parts during the painting process.

Korean Patent No. 10-1296129 (2013. 08. 05.) Korean Patent No. 10-1968991 (2019. 04. 09.)

An embodiment of the present invention seeks to provide a 3D scan data-based artifact drawing generation device and method that can generate digital drawing data by analyzing and visualizing the size, shape, and surface of the artifact based on 3D scan data of the artifact.

An embodiment of the present invention seeks to provide an apparatus and method for generating a 3D scan data-based artifact drawing that can clearly display shape information and surface irregularity information by performing a shading operation on the 3D scan data of the artifact. .

One embodiment of the present invention seeks to provide a 3D scan data-based artifact drawing generation device and method that can improve artifact drawing performance by accurately detecting the outline of the javelin area in the artifact through X-ray rendering.

An apparatus for generating a 3D scan data-based artifact drawing according to an embodiment of the present invention includes a 3D scanning unit that acquires 3D data through 3D scanning of an original artifact; a region division unit that performs region division on the 3D data based on a user-defined viewpoint vector and cutting plane; A line detection unit that acquires a 2D artifact image based on area information divided from the 3D data and extracts an outline and a cross-sectional line; a dimension measuring unit that measures thickness and length values at a designated location of the 3D data as dimension values; and a drawing generator that generates a drawing of the original artifact by matching the outline or section line extracted from the 3D data and modifying and adjusting the shape, thickness, and length of the designated location.

The 3D scanning unit obtains the 3D data by performing 3D modeling after 3D scanning the original artifact through a scanner, and positions the 3D data with the floor surface aligned with the plane or horizontal line set by the user. You can align them by rotating them horizontally or vertically.

The 3D scan unit adjusts the rotation angle from -180° to 180° when aligned, and the rotation angle can be selected in ±0.1°, ±1°, ±5°, and ±90° increments.

The area dividing unit may divide the 3D data into a three-dimensional area or a planar area based on a user-defined viewpoint vector and cutting plane.

The line extractor may extract 2D SVG outlines and cross-section lines at a designated center line location for the 3D data.

The drawing generator may perform a shading operation on the 3D data to analyze the unevenness of the surface of the relic and apply it to the relic drawing to provide visualization.

The drawing generator may X-ray render the 3D data and visualize the javelin by calculating an invisible internal javelin tilt based on the view direction.

Among embodiments, a method for generating a 3D scan data-based artifact drawing includes a 3D scanning step of acquiring 3D data by performing 3D scanning of an original artifact and rotating and aligning the obtained 3D data; A region division step of performing artifact region division on the aligned 3D data using a viewpoint vector and a cutting plane to obtain elevations and cross sections required for drawing work; A line extraction step of extracting a 2D outline image and a 2D cross-sectional line image from a designated center line of the 3D data through SVG format conversion; A dimension measurement step of measuring the height, width, and thickness at a designated location for the 3D data as dimension values; and a drawing generation step of generating a drawing of the artifact by matching the 2D outline image and the 2D cross-sectional line image extracted based on the designated center line of the 3D data.

The disclosed technology can have the following effects. However, since it does not mean that a specific embodiment must include all of the following effects or only the following effects, the scope of rights of the disclosed technology should not be understood as being limited thereby.

The 3D scan data-based artifact drawing generation device and method according to an embodiment of the present invention can generate digital drawing data by analyzing and visualizing the size, shape, and surface based on the 3D scan data of the artifact.

The apparatus and method for generating a 3D scan data-based artifact drawing according to an embodiment of the present invention can clearly display shape information and surface irregularity information by performing a shading operation on the 3D scan data of the artifact.

The 3D scan data-based artifact drawing generation device and method according to an embodiment of the present invention can improve artifact drawing performance by accurately detecting the outline of the javelin area in the artifact through X-ray rendering.

Therefore, the device and method for generating a 3D scan data-based relic drawing according to the present invention allow a typical worker to 3D scan a rare and valuable relic without damaging or damaging it, freely move and align the scanned image, and create the overall external outline and outline of the relic. By measuring and drawing the size, thickness, and cross-sectional dimensions of each necessary part very accurately and precisely, the shape of the relic can be accurately confirmed and recorded, and in the case of damaged relics, it can be accurately restored to its original state.

1 is a diagram illustrating a system for generating artifact drawings according to the present invention.
FIG. 2 is a diagram explaining the system configuration of the artifact drawing generating device of FIG. 1.
FIG. 3 is a diagram explaining the functional configuration of the artifact drawing generating device of FIG. 1.
Figure 4 is a flowchart explaining the process of drawing an original artifact in the artifact drawing generation device according to the present invention.
Figure 5 is a diagram showing an embodiment of the drawing process of an artifact according to the present invention.
Figure 6 is a screen state diagram showing an embodiment of the 3D data alignment process according to the present invention.
Figure 7 is a screen state diagram showing an embodiment of the 3D data line extraction process according to the present invention.
Figure 8 is a screen state diagram showing an embodiment of the 3D data X-ray rendering process according to the present invention.
Figure 9 is a screen state diagram showing an embodiment of the process of matching lines extracted from 3D data according to the present invention.

Since the description of the present invention is only an example for structural or functional explanation, the scope of the present invention should not be construed as limited by the examples described in the text. In other words, since the embodiments can be modified in various ways and can have various forms, the scope of rights of the present invention should be understood to include equivalents that can realize the technical idea. In addition, the purpose or effect presented in the present invention does not mean that a specific embodiment must include all or only such effects, so the scope of the present invention should not be understood as limited thereby.

Meanwhile, the meaning of the terms described in this application should be understood as follows.

Terms such as “first” and “second” are used to distinguish one component from another component, and the scope of rights should not be limited by these terms. For example, a first component may be named a second component, and similarly, the second component may also be named a first component.

When a component is referred to as being “connected” to another component, it should be understood that it may be directly connected to the other component, but that other components may exist in between. On the other hand, when a component is referred to as being “directly connected” to another component, it should be understood that there are no other components in between. Meanwhile, other expressions that describe the relationship between components, such as "between" and "immediately between" or "neighboring" and "directly neighboring" should be interpreted similarly.

Singular expressions should be understood to include plural expressions unless the context clearly indicates otherwise, and terms such as “comprise” or “have” refer to implemented features, numbers, steps, operations, components, parts, or them. It is intended to specify the existence of a combination, and should be understood as not excluding in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

For each step, identification codes (e.g., a, b, c, etc.) are used for convenience of explanation. The identification codes do not explain the order of each step, and each step clearly follows a specific order in context. Unless specified, events may occur differently from the specified order. That is, each step may occur in the same order as specified, may be performed substantially simultaneously, or may be performed in the opposite order.

All terms used herein, unless otherwise defined, have the same meaning as commonly understood by a person of ordinary skill in the field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as consistent with the meaning they have in the context of the related technology, and cannot be interpreted as having an ideal or excessively formal meaning unless clearly defined in the present application.

1 is a diagram illustrating a system for generating artifact drawings according to the present invention.

Referring to FIG. 1 , the artifact drawing generation system 100 may include an original artifact 110, a scanner 130, an artifact drawing generation device 150, and a database 170.

The original artifact 110 is a drawing object and may include various excavated artifacts such as pottery, tiles, tombstones, and porcelain, but is not necessarily limited thereto and may include various remains and artifacts that require drawing.

The scanner 130 may obtain scan data by scanning the original artifact 110 in 3D. The scanner 130 can obtain 3D shape information from the outside without contacting the original artifact 110 by applying a 3D scanning method. The scanner 130 may be connected to the relic drawing generating device 150 through a network, and, unlike Figure 1, may be implemented by being included in the relic drawing generating device 150. In this case, the scanner 130 is an original relic generating device. It can perform the role of the 3D scanning unit 310 constituting (150).

The artifact drawing generating device 150 may be implemented as a server corresponding to a computer or program that can draw 3D data obtained through 3D scanning of the original artifact 110. The artifact drawing generation device 150 acquires sorted data from 3D scan data, divides the artifact area based on 3D depth, acquires a 2D artifact image through 2D projection based on the divided area information, and then performs contour detection. You can create drawings through The artifact drawing generating device 150 may be connected to the scanner 130 through a wired network or a wireless network such as Bluetooth or Wi-Fi, and may communicate with the scanner 130 through the network.

The database 170 may correspond to a storage device that stores various information required during the operation of the artifact drawing generating device 150. For example, the database 170 is a measurement tool for measuring the height, width, thickness, etc. of artifacts from 3D scan data and can store various programs such as Adobe Illustrator, but is not necessarily limited to this and is not limited to this. The drawing creation device 150 may store information collected or processed in various forms during the process of drawing the original artifact 110.

FIG. 2 is a diagram explaining the system configuration of the artifact drawing generating device of FIG. 1.

Referring to FIG. 2, the artifact drawing generating device 150 may be implemented including a processor 210, a memory 230, a user input/output unit 250, and a network input/output unit 270.

The processor 210 can execute a procedure that processes each step in the process of operating the artifact drawing generating device 150, and can manage the memory 230 that is read or written throughout the process, and the memory ( 230), the synchronization time between the volatile memory and the non-volatile memory can be scheduled. The processor 210 can control the overall operation of the artifact drawing generating device 150 and is electrically connected to the memory 230, the user input/output unit 250, and the network input/output unit 270 to control data flow between them. can do. The processor 210 may be implemented as a central processing unit (CPU) of the artifact drawing generating device 150.

The memory 230 may be implemented as a non-volatile memory such as a solid state drive (SSD) or a hard disk drive (HDD) and may include an auxiliary memory used to store all data required for the artifact drawing generation device 150. , may include a main memory implemented as volatile memory such as RAM (Random Access Memory).

The user input/output unit 250 may include an environment for receiving user input and an environment for outputting specific information to the user. For example, the user input/output unit 250 may include an input device including an adapter such as a touch pad, touch screen, on-screen keyboard, or pointing device, and an output device including an adapter such as a monitor or touch screen. In one embodiment, the user input/output unit 250 may correspond to a computing device connected through a remote connection, and in such case, the artifact drawing creation device 150 may be performed as an independent server.

The network input/output unit 270 includes an environment for connecting with external devices or systems through a network, for example, Local Area Network (LAN), Metropolitan Area Network (MAN), Wide Area Network (WAN), and VAN ( It may include an adapter for communication such as a Value Added Network).

FIG. 3 is a diagram explaining the functional configuration of the artifact drawing generating device of FIG. 1.

Referring to FIG. 3, the artifact drawing generating device 150 includes a 3D scanning unit 310, a region dividing unit 330, a line detecting unit 350, a dimension measuring unit 370, a drawing generating unit 390, and a control unit ( (not shown) may be included.

The 3D scanning unit 310 may acquire 3D scan data through 3D scanning of the original artifact 110. The 3D scanning unit 310 may acquire 3D scan data by 3D scanning the original artifact 110 through the scanner 130.

3D scanning can refer to a series of processes that acquire shape information of an object and convert it into digital information by projecting a laser or white light onto an object using a 3D scanner.

In one embodiment, the 3D scanning unit 310 may obtain shape information from the outside without contacting the original artifact 110 by applying a 3D scanning method. The 3D scanning unit 310 can scan at the right angle and on the right shot through the scanner 130 to prevent distortion and ensure that a valid data section exists. Here, the 3D scan unit 310 can perform multiple scans by changing the position of the scanner 130 when data cannot be secured with a single scan in one direction, and at this time, scan so that an overlap section exists for data matching. can do. The 3D scanning unit 310 may generate 3D artifact scan data by performing 3D modeling on each scan data. For example, the 3D scanning unit 310 may acquire 3D artifact scan data by reconstructing scan data consisting of point cloud data into a surface and modeling it to create a visual three-dimensional effect.

In one embodiment, the 3D scan unit 310 can obtain correctly aligned data by horizontally and vertically rotating the 3D scan data at various angles. For example, the 3D scanning unit 310 stores 3D scanned data in a random state in which the original artifact 110 is lying or tilted so that the bottom surface is aligned with the plane or horizontal line set by the user. You can adjust the angle and rotate it to align it. Here, the 3D scan unit 310 can adjust the rotation angle from -180° to 180° when aligned, and the rotation angle can be selected in increments of 0.1°, 1°, 5°, and 90°.

The region division unit 330 may divide the artifact region by performing region division on the 3D data. In one embodiment, the region dividing unit 330 may divide 3D data into a plurality of regions based on a user-defined viewpoint vector and cutting plane. For example, the area dividing unit 330 may divide 3D data into three areas: the front part, the cross-section part, and the back part. The area divider 330 operates when a user-defined viewpoint vector exists on an arbitrary axis and a cutting surface perpendicular to the viewpoint vector exists. If the coordinates of the cutting surface are 0, the set with coordinates greater than 0 is the front part, and the coordinates are 0. The set can be the cross-section part, and the set whose coordinates are less than 0 can be the rear part. Each divided area becomes a three-dimensional area (front, back) or a flat area (cross-section).

The line extractor 350 may acquire a 2D artifact image based on the divided region information and extract the outline and cross-sectional line using a line extraction algorithm. In one embodiment, the line extractor 350 may acquire a 2D artifact image through format conversion of stl2svg and svg2png for 3D data. The line extractor 350 can extract a 2D SVG outline (outline) at a designated center line location for 3D data. Here, the center line is also called a boundary box.

SVG stands for Scalable Vector Graphic, which is a method of expressing each pixel of an image with a formula. It is known and common that no damage occurs to the enlarged image even if the image is enlarged indefinitely, so no further Detailed explanation will be omitted.

Additionally, the line extractor 350 may extract a 2D section line or a section line at a designated center line location for 3D data.

The dimension measurement unit 370 can measure the thickness and length at a designated location for 3D data as dimension values. In one embodiment, the size measurement unit 370 can automatically measure the size of the artifact using an Adobe Illustrator tool for 3D data and check the height and width values. The dimension measurement unit 370 can determine the numerical value by specifying two points on the 2D artifact image, so that objective numerical information of the artifact can be determined.

The drawing generator 390 may generate a drawing of the original artifact 110 by modifying and adjusting the shape, thickness, and length of a designated location with respect to the 3D data. That is, the drawing generator 390 adjusts the appearance, curve, curvature, straight line, straightness, rendering, line thickness, surface texture, shape, color, etc. of the artifact based on 3D data, 2D outline, and cross-section line data. It can be transformed. In one embodiment, the drawing generator 390 may create a drawing by matching the 3D data with the extracted 2D outline or section line at the location designated by the center line.

In one embodiment, the drawing generator 390 may perform surface analysis by performing a shading operation on 3D data and apply it to a drawing of an artifact for visualization. Here, the drawing generator 390 can perform surface analysis of 3D data using a shader program.

Shader is a function that calculates various visual effects (position, color, texture, lighting, etc.) in 3D computer graphics and ultimately calculates the position and color of the pixel to be displayed on the screen.

The drawing generator 390 can calculate a gradient map, which is information about the slope of the surface, from 3D data through a first shading operation, calculate the curvature through the gradient map, and then perform a second shading based on the curvature. By performing the ding operation, a gray map, which is information about the degree of roughness of the surface, can be calculated.

The drawing generator 390 may apply the gray map to drawing the original artifact 110 to express minute changes in the surface of the artifact.

In one embodiment, the drawing generator 390 may express information that is not visible from the front, such as internal manufacturing marks or internal javelins of 3D data, through X-ray rendering. The drawing generator 390 can prevent visualization interference due to image overlap by deleting information on the central horizontal axis based on the top view direction.

The control unit (not shown) controls the overall operation of the artifact drawing generating device 150 and generates the 3D scanning unit 310, area dividing unit 330, line extracting unit 350, dimension measuring unit 370, and drawing. Control flow or data flow between units 390 can be managed.

Figure 4 is a flowchart explaining the process of drawing an original artifact in the artifact drawing generation device according to the present invention.

Referring to FIG. 4, the artifact drawing generating device 150 performs 3D scanning of the original artifact 110 through the 3D scanning unit 310 to obtain 3D scan data and rotates and aligns the acquired 3D scan data. There is (step S410). The artifact drawing generating device 150 may perform artifact region division on the aligned 3D data using the viewpoint vector and the cutting surface through the region dividing unit 330 (step S430). The area division unit 330 divides the 3D data into three areas: front, cross-section, and rear to obtain elevations and cross-sections required for drawing work.

Additionally, the artifact drawing generating device 150 may extract outlines and cross-section lines through the line extractor 350 (step S450). The line extractor 350 can extract 2D SVG outlines and cross-section lines from a designated center line for 3D data. The line extraction unit 350 can directly extract lines from 3D scan data. The extracted lines are saved in SVG format, which is vector type data, and can be easily used in Adobe Illustrator without loss of precision. The artifact drawing generating device 150 can measure the height, width, and thickness of the 3D data at a designated location as dimension values through the dimension measurement unit 370.

In addition, the relic drawing generating device 150 generates a relic drawing by matching the 2D outline image extracted based on the designated center line of the 3D data and the 2D cross-section line image extracted based on the designated center line through the drawing generating unit 390. (step S490).

Figure 5 is a diagram showing an embodiment of the drawing process of an artifact according to the present invention.

Referring to FIG. 5, the artifact drawing creation device 150 performs digital drawing work in four steps: (a) 3D scanning step, (b) actual measurement step, (c) file format export step, and (d) drafting step. You can.

In the 3D scanning step (a) of FIG. 5, the original artifact 110 may be 3D scanned for a predetermined period of time using the scanner 130. Here, the scanner 130 can use a high-precision laser scanner, and different scanning methods can be used depending on the deformity of the original artifact 110. The artifact drawing generating device 150 may acquire 3D data by merging the scan data after taking a 3D scan.

In the actual measurement step (b) in Figure 5, 3D data can be rotated and aligned in the same environment as arranging artifacts on an actual plan sheet. The artifact drawing creation device 150 can acquire line data from 3D data arranged as if drawing an elevation and cross section using actual measuring points, bodies, and calipers. The relic drawing generation device 150 can express information that is not visible from the front, such as internal manufacturing marks or internal javelins, through rendering.

In the (c) file format export step of Figure 5, the line data (vector data) of the SVG file and the high-resolution 3D artifact image data of the JPG file are drawn by drag-and-drop. You can send it to a program such as Later or CAD and have it run in that program.

In the drafting step (d) of Figure 5, the user can complete the drawing of the relic by drawing extensions and production marks within a program such as Illustrator or CAD and then completing the drafting work.

Figure 6 is a screen state diagram showing an embodiment of the 3D data alignment process according to the present invention.

Referring to FIG. 6 , the artifact drawing generating device 150 may perform a process of rotating and aligning 3D scan data in the process of drawing an artifact. The alignment process may correspond to the act of arranging artifacts on the plan so that they touch the floor.

In FIG. 6, the artifact drawing generating device 150 includes a scroll bar 610 provided at the bottom of the execution screen, angle buttons 620 provided on the right side of the execution screen, and a user-defined button ( 630) can be used to rotate 3D data. Here, the scroll bar 610 can adjust the rotation angle from -180° to 180°, and the angle buttons 620 rotate at ±0.1°, ±1°, ±5°, and ±90°. An angle can be selected, and the user definition button 630 allows the user to input the desired angle. The relic drawing generating device 150 may align the relic image with the floor surface by rotating the 3D data according to a rotation angle set by the user or automatically.

Figure 7 is a screen state diagram showing an embodiment of the 3D data line extraction process according to the present invention.

Referring to FIG. 7 , the relic drawing generating device 150 may perform a process of extracting lines such as outlines and cross-section lines from 3D data aligned on the floor surface during the drawing process of the relic. The line extraction process selects a cutting surface based on sorted 3D data and extracts 2D line data (vector data) at the selected cutting surface location. The artifact drawing generating device 150 can generate line data by adjusting the rotation axis on the top, front, right side, etc.

In Figure 7, (a) is line data extraction when the rotation axis is adjusted from the top side, (b) is line data extraction when the rotation axis is adjusted from the front side, and (c) is line data extraction when the rotation axis is adjusted from the right side. am.

Figure 8 is a screen state diagram showing an embodiment of the 3D data X-ray rendering process according to the present invention.

Referring to FIG. 8, the relic drawing generating device 150 calculates the invisible internal javelin tilt based on the view direction of the 3D data through X-ray rendering during the drawing process of the relic to visualize the javelin. You can.

Figure 9 is a screen state diagram showing an embodiment of the process of matching lines extracted from 3D data according to the present invention.

Referring to (a) of FIG. 9, the artifact drawing generating device 150 can generate (extract) an image that matches the 2D outline image extracted based on the specified center line and the 2D cross-section image extracted based on the specified center line. there is.

Referring to (b) of FIG. 9, the artifact drawing generating device 150 adjusts the position of the center line, which is the reference of the 2D outline image and the cross-section line image extracted based on the center line of the designated position, to create an outline image of an asymmetric shape and an outline image of an asymmetric shape, respectively. It can be registered with a cross-sectional line image. Here, the position of each center line from which the outline image and the cross-sectional line image are extracted can be modified in various ways and the extracted corresponding images can be matched.

The outline image and section line image extracted based on the center line can be either left or right. As shown in (b) of Figure 9, the outline image can be placed on the left and the section line image on the right, and vice versa. It can also be an image of a shape.

An apparatus and method for generating a drawing of a relic based on 3D scan data according to an embodiment can generate a drawing image based on 3D scan data of a relic or precisely and accurately observe the inside of an old ship's javelin.

Although the present invention has been described above with reference to preferred embodiments, those skilled in the art may make various modifications and changes to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that you can do it.

100: Artifact drawing generation system
110: Original Artifact 130: Scanner
150: Artifact drawing generation device 170: Database
210: Processor 230: Memory
250: user input/output unit 270: network input/output unit
310: 3D scanning unit 330: Area dividing unit
350: Line extraction unit 370: Dimension measurement unit
390: Drawing creation unit

Claims (8)

3D scanning unit that acquires 3D data through 3D scanning of the original artifact;
a region division unit that performs region division on the 3D data based on a user-defined viewpoint vector and cutting plane;
A line detection unit that acquires a 2D artifact image based on area information divided from the 3D data and extracts an outline and a cross-sectional line;
a dimension measuring unit that measures thickness and length values at a designated location of the 3D data as dimension values; and
A drawing generator that generates a drawing of the original artifact by matching the outline or cross-section line extracted from the 3D data and modifying and adjusting the shape, thickness, and length of the designated location,
The 3D scanning unit
The 3D data is sorted by horizontal rotation or vertical translation at various angles, and when sorting, the rotation angle is adjusted from -180° to 180°, in units of ±0.1°, ±1°, ±5°, and ±90°. Select the rotation angle with
The area division unit is
According to the coordinates of the cutting plane perpendicular to the viewpoint vector, the 3D data is divided into three areas, a front part, a cross-section part, and a back part, and divided into a three-dimensional area (front part, back part) or a planar area (cross-section part),
The drawing creation unit
Through the first shading operation, a gradient map, which is information about the slope of the surface, is calculated from the 3D data, and the curvature is calculated through the gradient map, and then a second shading operation is performed based on the curvature to calculate the surface A 3D scan data-based artifact drawing generation device that calculates a gray map, which is information about the degree of unevenness, and applies it to the artifact drawing based on the gray map to visualize and provide subtle changes in the artifact surface. .
The method of claim 1, wherein the 3D scanning unit
After 3D scanning the original artifact using a scanner, 3D modeling is performed to obtain the 3D data, and the 3D data is positioned horizontally or vertically so that the bottom surface is aligned with the plane or horizontal line set by the user. A 3D scan data-based artifact drawing generation device characterized by rotation and alignment.
delete delete The method of claim 1, wherein the line extractor
A 3D scan data-based artifact drawing generation device, characterized in that extracting 2D SVG outlines and cross-section lines at a designated center line location for the 3D data.
delete The method of claim 1, wherein the drawing generator
A device for generating artifact drawings based on 3D scan data, characterized in that the javelin is visualized by X-ray rendering the 3D data and calculating the invisible internal javelin tilt based on the view direction.
A 3D scanning step of acquiring 3D data by performing 3D scanning of the original artifact and rotating and aligning the obtained 3D data;
A region division step of performing artifact region division on the aligned 3D data using a viewpoint vector and a cutting plane to obtain elevations and cross sections required for drawing work;
A line extraction step of extracting a 2D outline image and a 2D cross-sectional line image from a designated center line of the 3D data through SVG format conversion;
A dimension measurement step of measuring the height, width, and thickness at a designated location for the 3D data as dimension values; and
A drawing generation step of generating a relic drawing by matching a 2D outline image and a 2D cross-sectional line image extracted based on a designated center line for the 3D data,
The 3D scanning step is
The 3D data is sorted by horizontal rotation or vertical rotation at various angles, and when sorting, the rotation angle is adjusted from -180° to 180° and in units of ±0.1°, ±1°, ±5°, and ±90°. Select the rotation angle,
The area division step is
According to the coordinates of the cutting plane perpendicular to the viewpoint vector, the 3D data is divided into three areas, a front part, a cross-section part, and a back part, and divided into a three-dimensional area (front part, back part) or a planar area (cross-section part),
The drawing creation step is
Through the first shading operation, a gradient map, which is information about the slope of the surface, is calculated from the 3D data, and the curvature is calculated through the gradient map, and then a second shading operation is performed based on the curvature to calculate the surface A method of generating a drawing of a relic based on 3D scan data, comprising calculating a gray map, which is information about the degree of unevenness, and applying it to the drawing of the relic based on the gray map to visualize and provide subtle changes in the surface of the relic. .