KR102536525B1 - Filming Device for 3D Scanning Using a Special Mannequin Equipped With a Marker - Google Patents

Abstract

A photographing device for 3D scanning using a special mannequin equipped with a marker according to the present invention comprises: special mannequins provided to mount target products for 3D scanning; and a photographing system that photographs the special mannequin using a plurality of optical equipment and acquires a plurality of image data for 3D scanning of the target product, wherein the special mannequin is provided with one or more markers for performing optical equipment alignment through the plurality of image data generated by the photographing system. Thus, the present invention can provide the photographing device for 3D scanning capable of performing high-quality 3D scanning of target products mounted on a special mannequin equipped with markers.

Description

Filming Device for 3D Scanning Using a Special Mannequin Equipped With a Marker}

The present invention relates to a photographing apparatus for 3D scanning, and more particularly, to a photographic apparatus for 3D scanning of apparel products capable of performing high-quality 3D scanning of a target product using a special mannequin equipped with a marker.

Recently, 3D scanning equipment for 3D scanning of a human body, products, etc., has been actively spread in various industrial fields.

Such 3D scanning equipment is generally classified into a contact type and a non-contact type, and the contact type scanning equipment has a method of measuring a probe called a transducer and directly touching an object to be measured. Although the accuracy of the measuring point is excellent, there is a disadvantage that the probe may deform or damage the object because it contacts the surface of the object.

In addition, non-contact scanning equipment can be classified into active and passive types depending on whether or not light is directly directed at the subject. Typically, a cage that captures the appearance of an object from all directions by arranging a plurality of optical devices in a form surrounding the entire circumference of the object. Scanning equipment of this type is widely used.

In this way, a method of directly producing a 3D model including a texture using a photograph is called photogrammetry.

Due to the nature of omnidirectional simultaneous shooting, such a cage-type scanning device arranges lighting fixtures to surround the entire circumference of an object like optical equipment, so when shooting at a specific angle, if the object is made of a highly reflective material, other lighting may be affected. There is a problem in that high-quality 3D data may not be obtained because objects may not have the original color due to interference by the object.

In addition, the cage-type scanning equipment has a lot of optical equipment placed all over the circumference of the object, and in order to improve the quality of the result, the optical equipment must be placed at a very narrow angle. Of course, sufficient space is required, and when the number of optical devices is reduced, sufficient data cannot be secured, resulting in deterioration of scan quality.

Therefore, a method for solving these problems is required.

Korean Patent Registration No. 10-1909552

The present invention has been made to solve the above-described problems of the prior art, and has an object to provide a 3D scan imaging device capable of high-quality 3D scanning of a target product mounted on a special mannequin equipped with a marker.

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

In order to achieve the above object, the photographing apparatus for 3D scanning using a special mannequin equipped with a marker of the present invention uses a special mannequin provided to mount a target product for 3D scanning and a plurality of optical equipment, and a photographing system for acquiring a plurality of image data for 3D scanning of the target product by photographing the mannequin, and in the special mannequin for performing optical equipment alignment through a plurality of image data generated by the photographing system. One or more markers are provided.

Further, the special mannequin may include a torso corresponding to the torso of the human body.

In addition, the special mannequin may further include upper limbs corresponding to the upper limbs of the human body and connected to have a predetermined angle with respect to the torso.

In addition, the special mannequin further includes a head corresponding to a human head, and in this case, a marker for aligning optical equipment through a plurality of image data generated by a photographing system may be provided on the head.

The special mannequin further includes lower limbs corresponding to the lower limbs of the human body, and in this case, the marker may be provided at the lower end of the upper limbs in a form extending downward to a predetermined position of the lower limbs.

Meanwhile, in the photographing system, the special mannequin is seated on the top, and a turntable assembly provided to rotate the special mannequin with respect to the central axis of rotation in the vertical direction, and a predetermined distance from the central axis of rotation of the turntable assembly An imaging array installed at a spaced apart position, arranged along the vertical direction and seated on the turntable assembly at different altitudes to obtain a plurality of image data by photographing the special mannequin, and provided on the rear side of the special mannequin, A background film forming a background of image data photographed through the imaging array may be included.

A photographing device for 3D scanning using a special mannequin equipped with a marker of the present invention for solving the above problems includes a special mannequin provided to mount a target product for 3D scanning, and the special mannequin has As one or more markers are provided for aligning optical equipment through a plurality of image data generated by the system, there is an advantage in that high-quality 3D scanning is possible.

Accordingly, the present invention enables automatic production of 3D data, and in the process, manual work can be minimized or eliminated.

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

1 is a diagram showing the overall configuration of a photographing apparatus for 3D scanning according to an embodiment of the present invention;
2 is a view showing appearances of a turntable assembly and a special mannequin in a photographing device for 3D scanning according to an embodiment of the present invention;
Figure 3 is a diagram showing the quality of image data according to the angle of the upper limb of a special mannequin in the process of performing 3D scanning using a photographing device for 3D scanning according to an embodiment of the present invention;
4 is a view showing a process of performing optical equipment alignment by way of example;
5 and 6 are views showing actual photos of special mannequins applied to the present invention;
7 is a view showing a photograph of another form of a special mannequin applied to the present invention;
8 is a view showing a state in which a 3D scan operation is performed through a photographing apparatus for 3D scan according to an embodiment of the present invention; and
9 is a diagram showing a final 3D scanning result constructed using a photographing device for 3D scanning according to an embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention in which the object of the present invention can be realized in detail will be described with reference to the accompanying drawings. In describing the present embodiment, the same name and the same reference numeral are used for the same configuration, and additional description thereof will be omitted.

1 is a diagram showing the overall configuration of a photographing device for 3D scanning according to an embodiment of the present invention. The present invention uses a photogrammetry method for directly producing a 3D model including texture at least. It can be implemented with minimal equipment in a space of .

Referring to FIG. 1 , a photographing device for 3D scanning according to an embodiment of the present invention includes a special mannequin 10 provided to mount a target product for 3D scanning, and a plurality of such special mannequins 10. It includes a photographing system for acquiring a plurality of image data for 3D scanning of a target product by photographing using optical equipment.

At this time, one or more markers may be provided at a predetermined position of the special mannequin 10 . As such, the marker provided on the special mannequin 10 is for aligning optical equipment through a plurality of image data generated by the photographing system. This will be described later.

And in the case of this embodiment, the target product for 3D scanning is exemplified as a clothing product that can be worn on the special mannequin 10, but the type of target product is not limited thereto, and any product can be applied to the present invention, of course. .

In addition, the photographing system is not limited to equipment having a specific photographing method, and if it has a plurality of optical equipment capable of acquiring image data for an object, including an image sensor, not only the known existing photographing system but also new ones in the future All of the photographing systems to be developed and the like can be applied.

That is, the present invention is to acquire a plurality of image data of a target product using a special mannequin 10 equipped with a marker, and there are no limitations on the target product and shooting system applied thereto.

In this embodiment, the photographing system is exemplified in a form including a turntable assembly 100, an imaging array 200, a special mannequin 10, and a backdrop 300. This is presented as an example of one of the types of various imaging systems.

The turntable assembly 100 has a special mannequin 10 seated thereon, and is provided to rotate the special mannequin 10 based on a central axis of rotation in the vertical direction.

The imaging array 200 is installed at a position spaced apart from the rotation center axis of the turntable assembly 100 by a predetermined distance, and is arranged along the vertical direction to capture the special mannequin 10 seated on the turntable assembly 100. It is a component that acquires a plurality of image data by shooting at different altitudes.

The imaging array 200 of the present embodiment includes a support bar 220 extending vertically from the ground, and provided at different heights of the support bar 220 to provide a special mannequin 10 at different heights. It includes a plurality of optical devices 230 for acquiring image data, respectively, and a base part 210 supporting the lower part of the support bar 220 .

Since such an imaging array 200 is installed as a single unit on the front side of the turntable assembly 100, it can occupy only a minimum space, and also a special mannequin rotated by the turntable assembly 100 at a fixed position ( 10), it is possible to obtain a plurality of image data having photographing information under uniform lighting.

In addition, in the case of the present embodiment, a total of 8 optical devices 230 are installed from the top to the bottom of the support bar 220, but the number of optical devices 230 and the number of optical devices 230 are attached to the support bar 220. The fixed position may be variously changed.

In addition, the imaging array 200 may be applied in any form other than the present embodiment as long as it is a device capable of capturing images.

In addition, the backdrop 300 is provided on the rear side of the special mannequin 10 to form a background of image data photographed through the imaging array 200, and in this embodiment, the backdrop 300 has a single white color as a whole. catalog is formed

Such a background film 300 allows the boundary lines of the special mannequins 10 to be clearly distinguished from each other in the image data captured through the imaging array 200 so that the background can be easily removed.

Therefore, the present invention can acquire a good quality 2D image under uniform illumination, which results in greatly improving the quality of 3D scanning.

2 is a view showing appearances of the turn table assembly 100 and the special mannequin 10 in the photographing device for 3D scanning according to an embodiment of the present invention.

As shown in FIG. 2, in the present embodiment, the turntable assembly 100 generates a turntable 110 on which a special mannequin 10 is seated and a rotational driving force to move the turntable 110 up and down. It includes a drive motor 120 that rotates based on the rotation center axis.

At this time, the driving motor 120 may be provided inside the turntable 110 to rotate the turntable 110 by itself, as in the present embodiment, but may also have a method buried in the ground.

Also, the drive motor 120 may be a servo motor, and in this case, the turn table assembly 100 may further include a controller (not shown) for controlling the servo motor. That is, various driving elements such as the rotation direction, rotation speed, and rotation angle of the drive motor 120 may be controlled by the controller. Basically, in this embodiment, the turntable 110 can be controlled to rotate 360 degrees in about 100 seconds, but this can be changed according to the setting, of course.

The special mannequin 10 is formed in a shape imitating a human body so that a clothing product to be 3D scanned can be worn, and is provided on the turntable assembly 100 to be rotatable.

In this embodiment, the special mannequin 10 has a torso 11 corresponding to the torso of the human body, an upper limb 12 corresponding to the upper limbs of the human body, a head 13 corresponding to the head of the human body, and a lower limb corresponding to the human body. It includes a lower part 14 to be.

At this time, the upper limb 12 of the special mannequin 10 may be connected to have a predetermined angle (θ ₁ ) with respect to the torso 11, and the angle (θ ₁ ) may be sufficiently widened to 15˚ or more to wear clothes. ‹š It can be set so that the sleeve part of the arm and the top do not stick.

The reason for doing this is that, if not, the quality of the final product may be greatly degraded because the torso and arm portions of the clothing product are expressed in the form of being attached to each other in the final product.

In addition, the lower leg 14 of the special mannequin 10 may be connected so that a pair of legs have a preset angle (θ ₂ ), and the angle (θ ₁ ) is greater than or equal to 15˚, so that the crotch of the pants is widened. can be set so that

The reason for doing this is that, if not, the crotch part of the pants is attached to the final product, and when creating animation after 3D data is created, natural animation does not appear, and the quality of the final product may be greatly deteriorated.

3 is a diagram showing the quality of image data according to the angle of the upper limb 12 of the special mannequin 10 in the process of performing 3D scanning through the photographing device for 3D scanning of the present invention.

As shown in (A) of FIG. 3 , when the upper limb 12 of the special mannequin 10 is manufactured at an angle of less than 15 degrees with respect to the torso 11, the torso and arm of the clothing product are It can be confirmed that they were scanned in an attached form.

On the other hand, as shown in (B) of FIG. 3, when the upper limb 12 of the special mannequin 10 is made in a form wide open at a sufficient angle of 15 degrees or more with respect to the torso 11, the torso and arm parts are completely It can be confirmed that it was scanned in a separate form.

Referring back to FIG. 2 , in this embodiment, at least one of the head 13 and the upper limb 12 of the special mannequin 10 has an optical device through a plurality of image data generated by the imaging array 200. One or more markers M for performing alignment may be formed at a preset location.

Such a marker M is for accurately designating a connection point between image data in the process of connecting and synthesizing a plurality of image data. For example, when the color of the object to be scanned is black, it is not possible to align image data only with the color of the photograph. However, when the marker M is provided on the special mannequin 10, the image data is aligned based on the color of the marker M. will be able to perform

In particular, in this embodiment, the marker M of the head 13 is provided in the form of covering the entire head 13, and the marker M of the upper limb 12 is located at the lower end of the upper limb 12, that is, the hand. Although illustrated as being provided, this is not limited to only this embodiment.

At this time, the marker M provided on the upper limb part 12 is provided in a more extended form from the hand part of the upper limb part 12 to a predetermined position of the lower limb part 14, which is attached to the clothing on the lower limb part 14. This is to facilitate the process of aligning the optical equipment through a plurality of image data by allowing the lower part of the marker (M) to be photographed together when photographing is performed by wearing the .

4 is a view showing the process of aligning optical equipment by way of example. As shown in FIG. 4, in the 3D scanning process using the photogrammetry method, the appearance of the marker M appearing in a plurality of image data A process of specifying and aligning the position of the optical equipment may be performed through

Meanwhile, FIGS. 5 and 6 are diagrams showing actual photos of special mannequins applied to the present invention.

Referring to the photos shown in Figures 5 and 6, as described above, the special mannequin includes a torso, upper limbs, head and lower limbs. In addition, the head and upper limbs are provided with markers for aligning optical equipment through photographed image data, and in particular, it can be seen that the markers provided in the upper limbs are extended downward.

In addition, as shown in the photographs of (A) and (B) of FIG. 6 , the body part has a shape corresponding to the shape of the clothing product so that the special mannequin part does not directly appear on the photographed image according to the type of clothing product to be worn. can have

For example, the photo of (A) is applied when wearing a clothing product in the form of an open front, such as a suit shirt, and has a part of the upper chest so that the torso is not exposed on the photo, and the photo of (B) is a general It is applied when wearing clothing products that cover the entire upper body, such as T-shirts and knits, and unlike (A), the upper chest has a shape that is not pierced.

In addition, the support bar connecting the torso and the head may be extended so that the connecting portion of the head is positioned approximately 11 cm above the extension line connecting the clavicle of the torso.

Meanwhile, FIG. 7 is a view showing pictures of various types of mannequins that can be applied as special mannequins of the present invention.

As shown in FIG. 7 , the special mannequin does not necessarily have to have a torso, head, upper limbs, and lower limbs, but may have a shape including only some of them.

For example, as shown in FIG. 7(A), only the torso is provided, as shown in FIG. 7(B), only the torso and upper limbs are provided, and as shown in FIG. 7(C), only the torso and head are provided. It can be applied as a special mannequin in any form, such as the form provided.

That is, any type of special mannequin provided with a marker falls within the scope of the present invention.

And, as shown in (D) of FIG. 7, when the special mannequin is composed of two or more of the torso, head, upper limbs, and lower limbs, each component may be formed to be selectively coupled or separated from each other, This may be determined according to the type of target product.

8 is a diagram illustrating a state in which a 3D scan operation is performed through a photographing apparatus for 3D scan according to an embodiment of the present invention. As shown in FIG. 8 , the 3D scanning operation using the photographing device for 3D scanning of apparel products according to an embodiment of the present invention may be performed through the following process.

First, the shooting of the special mannequin 10 is started through the plurality of optical equipment units 230 disposed at various heights of the imaging array 200, and at the same time, the rotation of the turntable assembly 100 by the control unit It is done. At this time, a backdrop 300 is provided behind the special mannequin 10 to form a background of image data photographed for the special mannequin 10 .

Accordingly, the imaging array 200 acquires image data over the entire circumference of the special mannequin 10, and each image data is transmitted to the rendering server through wired/wireless communication.

In addition, the rendering server collects and stores all image data, removes the background and the special mannequin 10 from each original image data, and processes it so that only the clothing product data remains. As described above, the area forming the background of the special mannequin 10 in the image data is the part where the backdrop 300 of a single color appears, and therefore, in the image data photographed through the imaging array 200, the boundary of the special mannequin 10 Since they are clearly distinguished from each other, the background can be easily removed.

At this time, in the background removal process, a candidate area for designating the background color is selected, and an optimal parameter is selected after searching for a removed area according to the statistical distribution of the background color. Here, the candidate area for specifying the background color may be in the upper left or upper right 15% range of the image data, and the control area searched for selecting the optimal parameter is -20% to +10% in the H value and -70 in the S value, respectively. It may be in the range of % to +70% and -100% to +100% in the V value.

Also, in this process, a region segmentation and merging technique using a watershed technique may be applied.

And, in the process of removing the special mannequin 10, a candidate area for extracting the special mannequin 10 is selected, and a removal area parameter according to the statistical distribution of the special mannequin 10 is selected.

At this time, the process of extracting the special mannequin 10 can extract the location and color value of the neck from the image in which the neck appears best, and also modify the watershed technique used in the background removal process to create a special mannequin 10. Region segmentation and merging techniques can be applied.

Next, a process of removing noise in the area where the background and the special mannequin 10 were located is performed in the image data, and then a process of analyzing the color distribution characteristics according to the influence of lighting and the processing method for the shadow area is performed. .

In addition, an image in which the background and the special mannequin 10 area are transparently processed is extracted from the image data, and 3D scanning of the clothing product is derived through an automated script.

9 is a diagram showing a final 3D scanning result constructed using a photographing device for 3D scanning according to an embodiment of the present invention. The picture attached to the upper part of FIG. 9 shows 3D scanning of a target product manufactured through the above-described 3D scanning process, and the picture attached to the lower part of FIG. 9 shows an animation driving screen through 3D scanning and an avatar.

As described above, the present invention includes a special mannequin 10 provided to mount a target product for 3D scanning, and the special mannequin 10 includes a plurality of image data generated by a shooting system As one or more markers M for performing optical equipment alignment are provided, there is an advantage in that high-quality 3D scanning is possible.

As described above, the preferred embodiments according to the present invention have been reviewed, and the fact that the present invention can be embodied in other specific forms without departing from the spirit or scope in addition to the above-described embodiments is a matter of ordinary knowledge in the art. It is self-evident to them. Therefore, the embodiments described above are to be regarded as illustrative rather than restrictive, and thus the present invention is not limited to the above description, but may vary within the scope of the appended claims and their equivalents.

The present invention was derived through the research project of '3D data automation using 4K image sensor and virtual fitting system technology development', a project for commercialization of convergence technology in the fashion industry of the Seoul Business Agency.

10: special mannequin
11: fuselage
12: upper limbs
13: tofu
14: lower extremity
100: turn table assembly
110: turn table
120: drive motor
200: imaging array
210: base part
220: support bar
230: optical equipment
300: backdrop
M: marker

Claims (6)

a special mannequin provided to mount a target product for 3D scanning, including a torso corresponding to the torso of the human body, upper limbs corresponding to the upper limbs of the human body, and lower limbs corresponding to the lower limbs of the human body; and
a photographing system for acquiring a plurality of image data for 3D scanning of the target product by photographing the special mannequin using a plurality of optical devices;
Including,
In the special mannequin, one or more markers are provided on at least the upper limbs to perform optical equipment alignment by accurately designating a connection point between image data in the process of connecting and synthesizing a plurality of image data generated by the photographing system. do it,
The marker provided on the upper limb is provided in a form extending from the hand of the upper limb to a predetermined position lower than the upper limb, and is provided on the upper limb when photographing is performed by wearing clothes on the lower limb. It is formed so that the marker part extended to be photographed together to perform optical equipment alignment for the lower leg,
The shooting system,
a turn table assembly on which the special mannequin is seated and rotates the special mannequin with respect to a central axis of rotation in a vertical direction; and
It is installed at a position spaced apart from the rotational central axis of the turntable assembly by a predetermined distance, and a plurality of image data is obtained by photographing special mannequins arranged in the vertical direction and seated on the turntable assembly at different altitudes an imaging array including a plurality of optical devices;
including,
An imaging device for 3D scanning. delete According to claim 1,
The upper limb is connected to have a predetermined angle with respect to the torso.
An imaging device for 3D scanning. According to claim 1,
The special mannequin further includes a head corresponding to the head of the human body,
The head is provided with the marker,
An imaging device for 3D scanning. delete According to claim 1,
The shooting system,
Further comprising a backdrop provided on the rear side of the special mannequin and forming a background of image data photographed through the imaging array,
An imaging device for 3D scanning.

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