Automatic acquisition and modeling method for three-dimensional real scene of rock core

Abstract

According to the automatic acquisition and modeling method for the three-dimensional real scene of the rock core, the rock core is placed on the rotatable roller, and the rock core is automatically rotated through the roller, so that the plurality of cameras arranged on the periphery of the roller can cover the cylindrical surface and the cross section of the rock core, and 360-degree all-dimensional dead-corner-free shooting is performed on the rock core; the method comprises the following steps: taking a core picture as a template, ensuring the overlapping degree and angle of the core picture required by modeling, then automatically uploading the core picture to core three-dimensional live-action automatic modeling software independently developed in a server, carrying out full-automatic image preprocessing, aerial triangulation solution and texture mapping, carrying out full-automatic three-dimensional live-action modeling, and obtaining a core three-dimensional live-action model. According to the method, the steps are simple, a plurality of processes of photo acquisition, data processing, aerial triangulation calculation and texture mapping are combined into an automatic process, manual operation steps are reduced, the photo acquisition time and the subsequent core three-dimensional real scene modeling time are greatly shortened, the core shooting and modeling efficiency and success rate are improved, and the method is suitable for large-scale popularization and application. And the engineering rock core management level and the digital level are greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of geological exploration and relates to an automatic acquisition and modeling method. Background Art

[0002] In the fields of water conservancy and hydropower engineering, mining, etc., cores are cylindrical rock samples taken out from the hole using annular drill bits and other coring tools according to the needs of geological exploration and engineering. After the cores are collected, they need to be transported to the core warehouse for storage. The core storage is physical storage, which not only takes up a lot of space, but also has the risk of gradual damage over time and with multiple moves.

[0003] In recent years, with the rise and development of digital technologies such as 3D laser scanning, BIM modeling, and real-scene modeling, the 3D real-scene automated collection and modeling method of digital cores based on close-range photogrammetry technology has provided a new method for core storage and management. However, due to the small diameter of the physical core, the core is difficult to fix, and the blocked part of the core after fixation cannot participate in shooting and modeling, making it difficult to collect core cross-sectional data; in addition, real-scene modeling has high requirements for photo collection. Usually, real-scene modeling requires an overlap rate of more than 65%, and the interval between different shooting points at the same position of the core is <20°. The overlap and angle of core shooting are difficult to control, resulting in a low success rate of real-scene modeling. According to the survey, the current 3D real-scene collection equipment for cores based on 3D real-scene modeling technology can collect core columnar data, but it does not realize the collection of core cross-sectional data. In addition, in the 3D real-scene modeling of cores based on real-scene modeling technology, the real-scene modeling is generally manually imported and modeled after photo collection, and the steps are complicated and require a lot of time for data processing. In particular, for the large number of core data in large-scale projects, the traditional data collection and modeling are time-consuming. Summary of the invention

[0004] In order to solve the problems described in the background technology of difficulty in collecting core section data, difficulty in controlling the overlap and angle of core shooting, slow speed and low success rate of core three-dimensional real scene modeling, the present invention provides an automated collection and modeling method for core three-dimensional real scene.

[0005] The method of the present invention comprises:

[0006] The core is placed on multiple parallel rollers;

[0007] While the drum automatically rotates the core, multiple cameras arranged around the drum take photos of the core's cylindrical surface and cross section until the core rotates one circle;

[0008] Automatically upload the core photos taken by each camera to the server;

[0009] The independently developed core 3D real-scene automatic modeling software is automatically launched on the server side to automatically pre-process the core photos in batches, delete the background and other redundant image information except the core in the core photos, and only retain the core main body photos; the processed core main body photos are automatically subjected to aerial triangulation and texture mapping to finally obtain the core 3D real-scene model.

[0010] Furthermore, the cylinder and cross section of the core are first automatically photographed by multiple cameras arranged around the drum; then the drum automatically rotates the core Y by 15°, and the cylinder and cross section of the core Y are automatically photographed again by multiple cameras arranged around the drum until the core Y rotates one circle.

[0011] Furthermore, a camera rack is arranged around the drum, and a plurality of cameras are arranged on the inner wall of the camera rack. The cameras are arranged along the outer side of the cross section and the outer side of the cylinder of the core.

[0012] Furthermore, the camera frame is a horizontally placed U-shaped frame structure, the cameras on the left and right sides of the U-shaped frame structure are arranged along the outer side of the cross section of the core, and the camera on the bottom side of the U-shaped frame structure is arranged along the outer side of the cylinder of the core.

[0013] Furthermore, the cameras on the left and right sides of the camera stand can be moved and adjusted along the length direction of the core to take pictures of cross sections of cores of different lengths.

[0014] Furthermore, a light-diffusing plate is arranged on the inner wall of the camera frame, and a fill light is arranged inside the light-diffusing plate to adjust the color temperature and brightness according to the environment.

[0015] Furthermore, a light shield is arranged on the outside of the camera frame and the drum, and the fill light is turned on under the light shielding condition to take pictures of the cylinder and cross section of the core.

[0016] Furthermore, the camera is connected to the computer via a switch and a cable. The power cord in the cable supplies power to the camera and the fill light. The network cable in the cable connects to the transmission network interface of the camera to control the camera to take pictures and receive the camera's shooting data.

[0017] Furthermore, the roller is connected to the computer via a USB cable, and commands are sent via the computer serial port to control the rotation time, angle and speed of the roller.

[0018] Furthermore, the obtained three-dimensional real-scene model of the core is checked on the server side. If the modeling fails or the modeling effect is not good, the cause of the failure is analyzed and the model is re-photographed.

[0019] Compared with the prior art, the present invention places the core on a rotatable drum, and the drum automatically rotates the core, so that multiple cameras arranged around the drum can cover the core cylinder and section, and the core is photographed 360 degrees in all directions without dead angles, ensuring the overlap and angle of the core photos required for modeling, and then automatically uploaded to the server, automatically imported into the independently developed core three-dimensional real scene automated modeling software, and fully automatic image preprocessing, air three-dimensional solution and texture mapping are performed to perform fully automated three-dimensional real scene modeling, and obtain the core three-dimensional real scene model. The method of the present invention can collect all-round, dead angle-free multi-perspective photos of the physical core cylinder and section at one time, quickly and completely, and the real scene modeling does not need manual import and modeling processing after the photo is collected, and the steps are simple. The multiple processes of photo collection, data processing, air three-dimensional solution and texture mapping are merged into an automated process, reducing manual operation steps, greatly shortening the photo collection time and the subsequent core three-dimensional real scene modeling time, and the obtained three-dimensional real scene model can reflect the real texture and geometric shape of the core, improve the efficiency and success rate of core shooting and modeling, and greatly improve the engineering core management level and digital level. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 An isometric view of the apparatus used in the present invention.

[0021] Figure 2 It is a rear view of the device adopted by the present invention.

[0022] Figure 3 This is a schematic diagram of the camera frame structure of the equipment used in the present invention.

[0023] Figure 4 for Figure 2 Left side partial image.

[0024] Figure 5 for Figure 2 The right side partial image.

[0025] Figure 6 This is a schematic diagram of testing a core according to the present invention.

[0026] Figure 7 The diagram is a schematic diagram of a light shield (21) of the device used in the present invention, wherein (a) is a diagram of the external structure of the light shield (21), and (b) is a diagram of the internal structure of the light shield (21).

[0027] Figure 8 The present invention is a flow chart of the method.

[0028] Fig. 9 The principle diagram is collected for the three-dimensional real scene modeling technology of the present invention.

[0029] Fig.10 This is a three-dimensional real-life model of the core.

[0030] Explanation of reference numerals: 1- camera stand; 1.1- horizontal stand; 1.2- connecting plate; 1.3- adjusting plate; 1.4- angle stand; 1.5- moving support foot; 1.6- roller; 1.7- fixed support foot; 1.8- extension plate; 1.9- horizontal support foot; 1.10- hand screw; 2- light homogenizing plate; 3- window rubber plug; 4- camera; 5- fill light; 6- power input port for camera and light source; 7- network port; 8- power input port for switch; 9 switch; 10- control board; 11- rotating seat; 11.1- bottom plate; 11.2- end support platform; 11.3- Top plate; 11.4-end rotating connection seat; 11.5-middle support platform; 11.6-middle rotating connection seat; 11.7-rotating support seat; 12-power supply; 13-motor control port; 14-roller; 14.1-driven roller; 14.2-motor; 14.3-driving gear; 14.4-driven gear; 15-switch power output port; 16-camera and light source power output port; 17-power input port; 18-camera switch; 19-fill light brightness adjustment switch; 20-cable; 21-light shield (21); 21.1-movable window; Y-core. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] The automatic acquisition equipment of the three-dimensional real scene of the core used in the method of the present invention is as follows: Figures 1 to 6 As shown, the whole is composed of a camera frame 1, a rotating seat 11 and a plurality of parallel rollers 14. The camera frame 1 is a horizontally placed U-shaped frame structure, a plurality of cameras 4 are arranged on the inner side wall of the camera frame 1, and a supporting structure is arranged at the bottom of the camera frame 1; the rotating seat 11 is arranged inside the camera frame 1, and the end of the rotating seat 11 is fixedly connected to the supporting structure; the roller 14 is arranged on the rotating seat 11, and is used to place and rotate the core Y.

[0033] The camera 4 of the camera frame 1 is provided with a window rubber plug 3 on the outside, and the camera 4 can control the switch according to the length of the core Y to reduce the amount of shooting data and data interference. The inner wall of the camera frame 1 is a light-diffusing plate 2, and the inner wall of the light-diffusing plate 2 is provided with a fill light 5, which can adjust the color temperature and brightness according to the environment to ensure the shooting effect.

[0034] The specific structure of the camera frame 1 is as follows: Figures 2 to 5As shown, a plurality of cameras 4 are arranged on the inner side walls of the horizontal frame 1.1 and the angle frame 1.4, and both ends of the horizontal frame 1.1 are connected to one end of the angle frame 1.4 through a connecting plate 1.3 to form a U-shaped frame structure; specifically, as Figure 4 As shown, an adjustment plate 1.2 is arranged on the cross frame 1.1, and the adjustment plate 1.2 is provided with a plurality of screw holes passing through. The top of the cross frame 1.1 is provided with screw holes corresponding to the screw holes of the adjustment plate 1.2. One end of the connecting plate 1.3 is inserted between the cross frame 1.1 and the adjustment plate 1.2 and is connected with the cross frame 1.1 and the adjustment plate 1.2 by means of hand screws 1.10. Figure 3 As shown, the bottom of the two ends of the cross frame 1.1 is provided with cross frame support feet 1.9, the bottom of the cross frame support feet 1.9 is fixedly connected to one end of the extension plate 1.8, and the other end of the extension plate 1.8 is fixedly connected to the end of the rotating seat 11. Figure 4 and Figure 5 As shown, a movable support foot 1.5 is provided at the bottom of the exposed end of one of the angle frames 1.4, a roller 1.6 is provided at the bottom of the movable support foot 1.5, and a fixed support foot 1.7 is provided at the bottom of the exposed end of the other angle frame 1.4. Through the above arrangement, the fixed positions of the connecting plate 1.3, the cross frame 1.1 and the adjustment plate 1.2 are adjusted, so that the angle frame 1.4 can be adjusted and moved along the length direction of the cross frame 1.1. For cores Y of different lengths, the distance between the cameras 4 on the left and right angle frames 1.4 can be adjusted to ensure that the core Y is accurately focused.

[0035] like Figure 5 As shown, a switch 9 is fixed at the bottom of the angle frame 1.4, and the side of the switch 9 is in contact with the fixed support foot 1.7, that is, the switch 9 is arranged at the bottom of the angle frame 1.4 where the fixed support foot 1.7 is located. The exposed end of the angle frame 1.4 above the fixed support foot 1.7 is provided with a camera and light source power input port 6, a network port seat 7 and a switch power input port 8, and a camera switch 18 is arranged on the horizontal frame 1.1; cables 20 are arranged on the inner side of the horizontal frame 1.1 and the angle frame 1.4, and the cables 20 include a power line and a network cable. The power line has two positive and negative lines, and supplies power to the camera 4 and the fill light 4. The network cable is a Category 6 network cable, which is connected to the transmission network interface of the camera 4 to control the camera 4 to take pictures and receive the shooting data of the camera 4.

[0036] The specific structure of the rotating seat 11 is as follows Figure 4 and Figure 5As shown, the rotating seat 11 is provided with a bottom plate 11.1 and a top plate 11.3; the two ends of the bottom plate 11.1 and the two ends of the top plate 11.3 are fixedly connected through the end support platform 11.2, and the middle part of the bottom plate 11.1 and the middle part of the top plate 11.3 are fixedly connected through the middle support platform 11.5; the top of one end of the top plate 11.3 is provided with an end rotating connection seat 11.4, the top of the other end of the top plate 11.3 is provided with a rotating support seat 11.7, and the top of the middle part of the top plate 11.3 is provided with a middle rotating connection seat 11.6; the rotating support seat 11.7, the middle rotating connection seat 11.6 and the end rotating connection seat 11.4 are connected to the roller 14; the control board 10 and the power supply 12 are provided on the bottom plate 11.1 of the rotating seat 11. Figure 2 As shown, a motor control port 13, a switch power output port 15, a camera and light source power output port 16, a power input port 17 and a fill light brightness adjustment switch 19 are arranged on the side of the end support platform 11.2 below the end rotating connecting seat 11.4.

[0037] The specific structure of the drum 14 is as follows Figure 4 and Figure 5 As shown, the drum 14 is composed of a driven roller 14.1 and a driving mechanism; the driving mechanism is composed of a motor 14.2, a driving gear 14.3 and a driven gear 14.4, the motor 14.2 is arranged on the bottom plate, the motor 14.2 is arranged on the bottom plate, the power output end of the motor 14.2 is connected with the driving gear 14.3, the driving gear 14.3 and the driven gear 14.4 are arranged in the end support platform 11.2 below the rotating support seat 11.7, the driving gear 14.3 and the driven gear 14.4 are meshed with each other, and the driven gear 14.4 is meshed and connected with the driven roller 14.1 and drives the driven roller 14.1 to rotate. Multiple parallel rollers 14 enable the device to place cores Y of different diameters, so that a suitable placement position can be selected according to the diameter of the core Y, so that the distance between the lens and the cylindrical surface of the core Y of different diameters is kept consistent, so as to ensure that the fixed-focus lens image does not defocus, thereby obtaining a high-definition and high-precision real-life model; in this embodiment, the number of rollers 14 is 4, and of course the number of rollers 14 can be increased or decreased according to actual conditions.

[0038] like Figure 7 As shown, a light shield 21 may be provided on the outside of the camera frame 1, and the light shield 21 is provided with an active window 21.1. The active window 21.1 may be provided on the side and top of the light shield 21, and is connected to the light shield 21 through a hinge, so that the active window 21.1 can be folded along the hinge, which is convenient for placing the core Y on the drum 14. The setting of the light shield 21 ensures the shooting environment. On the one hand, it avoids interference from ambient light, and the uniform light plays a role of softening light. On the other hand, the single background highlights the core body, which is convenient for image background cutout processing during subsequent modeling, thereby improving the efficiency of subsequent image processing.

[0039] Through the switch 9 and the network port 7, the communication connection between the transmission network interface of all cameras 4 and the transmission network interface of the computer is realized. The photos taken by the camera 4 are automatically transmitted to the computer through the network cable by using the network cable signal transmission. The computer is connected to the computer using a USB cable, and the rotation time, angle and speed of the motor 14.2 can be controlled through the computer serial port. In order to ensure the efficiency of data transmission, an Ethernet port can be provided for each camera 4, and they are connected to the switch 9. Then, the switch 9 is connected to the computer to ensure that the computer has sufficient performance and network bandwidth to process the data generated by multiple cameras; the switch 9 uses a gigabit network port. The computer control software workflow is as follows: send instructions to the motor 14.2, rotate the core Y to a certain angle, the camera 4 automatically shoots, and the background performs image preprocessing and modeling processes after the photos are transferred to the specified folder of the computer. The shooting and data transmission are carried out continuously without affecting the next core Y shooting operation.

[0040] The camera 5 on the camera stand can cover the cylinder and cross section of the core Y. The core Y is placed on the rotatable drum 14. The drum 14 automatically rotates the core at a certain angle to perform 360-degree all-round shooting without blind spots. The rotation angle is preferably 15°, so that the interval between adjacent angles of different shooting points at the same position of the core Y is <20°. The real-scene modeling requires an overlap rate of more than 65% to ensure the overlap and angle of the core photos required for modeling, and then the photos are imported into the computer's three-dimensional real-scene modeling software to perform three-dimensional real-scene modeling of the core.

[0041] Using the above-mentioned automatic acquisition equipment for core three-dimensional real scene, the present invention proposes an automatic acquisition and modeling method for core three-dimensional real scene, the flow chart is as follows: Figure 8 The steps are as follows:

[0042] First, the core Y is placed on a plurality of parallel rollers 14;

[0043] Then, while the drum 14 automatically rotates the core Y, multiple cameras 4 arranged around the drum 14 automatically take photos of the cylindrical surface and cross section of the core Y until the core Y rotates one circle;

[0044] Automatically upload the core photos taken by each camera 4 to the server;

[0045] The core 3D real-scene automatic modeling software is automatically started on the server side to automatically pre-process the core photos in batches, delete the background and other redundant image information except the core in the core photos, and only retain the core main body photos; the processed core main body photos are automatically subjected to aerial triangulation and texture mapping to obtain the core 3D real-scene model.

[0046] Specifically, the present invention can automatically start the independently developed core 3D real scene automatic modeling software on the server side, automatically import photos, fully automatically preprocess images, automatically perform aerotriangulation and texture mapping, and can control the diameter and length of the core Y through an improved algorithm to perform fully automated 3D real scene modeling and obtain a 1:1 real-scale core 3D real scene model. The present invention realizes the core 3D real scene automatic modeling from data collection, data upload, image processing, and 3D real scene modeling.

[0047] Specifically, referring to the above-mentioned automated collection device for the three-dimensional real scene of the core, a plurality of parallel rollers 14 are arranged on the rotating seat 11, and the roller 14 is composed of a driven roller 14.1 and a driving mechanism, and the driving mechanism is arranged on the rotating seat 11. The specific structure of the driving mechanism is not repeated here. The core Y is placed between the two driven rollers 14.1 of the roller 14, and the driven roller 14.1 is driven to rotate by the driving mechanism, so that the roller 14 rotates, and the core Y is driven to rotate.

[0048] Specifically, the cylinder and cross-section of the core Y are first automatically photographed using multiple cameras 4 arranged around the drum 14; then the drum 14 automatically rotates the core Y by 15°, and the cylinder and cross-section of the core Y are automatically photographed again using multiple cameras 4 arranged around the drum 14 until the core Y rotates one circle.

[0049] More specifically, a camera frame 1 is arranged around the drum 14, and a plurality of cameras 4 are arranged on the inner wall of the camera frame 1, and the cameras 4 are arranged along the outer side of the cross section and the outer side of the cylinder of the core Y. More specifically, the camera frame 1 is a horizontally placed U-shaped frame structure, and the cameras 4 on the left and right sides of the U-shaped frame structure are arranged along the outer side of the cross section of the core Y, and the cameras 4 on the bottom side of the U-shaped frame structure are arranged along the outer side of the cylinder of the core Y. At the same time, the cameras 4 on the left and right sides of the camera frame 1 can be moved and adjusted along the length direction of the core Y, and take pictures of the cross sections of the core Y of different lengths to ensure that the cross section of the core Y is accurately focused. Specifically, referring to the automated acquisition equipment for the three-dimensional real scene of the core described above, in the camera frame 1, both ends of the horizontal frame 1.1 are connected to one end of the angle frame 1.4 through the connecting plate 1.3 to form a U-shaped frame structure; a plurality of cameras 4 are arranged on the inner side walls of the horizontal frame 1.1 and the angle frame 1.4; an adjustment plate 1.2 is arranged on the horizontal frame 1.1, and the adjustment plate 1.2 is provided with a plurality of screw holes penetrating therethrough, and the top of the horizontal frame 1.1 is provided with screw holes corresponding to the screw holes of the adjustment plate 1.2, and one end of the connecting plate 1.3 is inserted between the horizontal frame 1.1 and the adjustment plate 1.2 and is connected to the horizontal frame 1.1 and the adjustment plate 1.2 through the hand screw 1.10. Figure 3As shown, the bottom of the two ends of the cross frame 1.1 is provided with cross frame support feet 1.9, the bottom of the cross frame support feet 1.9 is fixedly connected to one end of the extension plate 1.8, and the other end of the extension plate 1.8 is fixedly connected to the end of the rotating seat 11. Figure 4 and Figure 5 As shown, a movable support foot 1.5 is provided at the bottom of the exposed end of one of the angle frames 1.4, a roller 1.6 is provided at the bottom of the movable support foot 1.5, and a fixed support foot 1.7 is provided at the bottom of the exposed end of the other angle frame 1.4. Through the above arrangement, the fixed positions of the connecting plate 1.3, the cross frame 1.1 and the adjustment plate 1.2 are adjusted, so that the angle frame 1.4 can be adjusted and moved along the length direction of the cross frame 1.1. For cores Y of different lengths, the distance between the cameras 4 on the left and right angle frames 1.4 can be adjusted to ensure that the core Y is accurately focused.

[0050] In addition, a light-diffusing plate 2 may be provided on the inner wall of the camera frame 1, and a fill light 5 may be provided inside the light-diffusing plate 2 to adjust the color temperature and brightness according to the environment to ensure the shooting effect.

[0051] In addition, a light shield 21 can be set on the outside of the camera frame 1 and the drum 14, and the fill light can be turned on under the condition of light shielding to take pictures of the cylindrical surface and cross section of the core Y. The setting of the light shield 21, on the one hand, ensures the shooting environment, avoids the interference of ambient light, and uniformly light plays a role of soft light. On the other hand, the background is single and the core body is highlighted, thereby improving the efficiency of subsequent image processing.

[0052] At the same time, the camera 4 can be connected to the computer through the switch 9 and the cable. The power cable in the cable supplies power to the camera 4 and the fill light. The network cable in the cable is connected to the transmission network interface of the camera 4 to control the camera 4 to take pictures and receive the shooting data of the camera 4. To ensure the efficiency of data transmission, an Ethernet port can be provided for each camera 4, and they are connected to the switch 9. Then, the switch 9 is connected to the computer to ensure that the computer has sufficient performance and network bandwidth to process the data generated by multiple cameras; the switch 9 uses a gigabit network port.

[0053] At the same time, the roller 14 is connected to the computer via a USB cable, and commands are sent through the computer serial port to control the rotation time, angle and speed of the roller 14.

[0054] Specifically, the computer sends a command to the drum 14 to rotate the core Y by a certain angle, such as 15°, and the camera 4 automatically takes pictures. The core photos are automatically transmitted to the server, and the three-dimensional real-scene modeling software is automatically started. The real-scene modeling process of image import, image preprocessing, aerial triangulation and texture mapping is automatically run in the background. The shooting and data transmission, data preprocessing and modeling are carried out continuously without affecting the next shooting operation of the core Y.

[0055] In addition, the obtained three-dimensional real-scene model of the core is also checked on the server side. If the modeling fails or the modeling effect is not good, the cause of the failure is analyzed and the model is re-photographed.

[0056] The principle diagram of the real scene modeling technology acquisition of the present invention is as follows Fig. 9 Shown for reference.

[0057] The method of the present invention is used to automatically collect and model a three-dimensional real scene of a core Y, and the obtained three-dimensional real scene model of the core is as follows: Fig.10 As shown, the cylinder and cross section of core Y are clear, which can reflect the real texture and geometric shape of core Y.

[0058] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A method for automatic acquisition and modeling of three-dimensional real scenes of cores, characterized in that: include: Placing the core (Y) on a plurality of parallel rollers (14); While the drum (14) automatically rotates the core (Y), a plurality of cameras (4) arranged around the drum (14) automatically take photos of the cylindrical surface and cross section of the core (Y) until the core (Y) rotates one circle; Automatically upload the core photos taken by each camera (4) to the server; The core 3D real-scene automatic modeling software is automatically started on the server side to automatically pre-process the core photos in batches, delete the background and other redundant image information except the core in the core photos, and only retain the core main body photos; the processed core main body photos are automatically subjected to aerial triangulation and texture mapping to obtain the core 3D real-scene model.

2. The method for automatic acquisition and modeling of a three-dimensional core scene according to claim 1, characterized in that: First, the cylinder and cross section of the core (Y) are automatically photographed for the first time using a plurality of cameras (4) arranged around the drum (14); then, the drum (14) automatically rotates the core (Y) by 15°, and the cylinder and cross section of the core (Y) are automatically photographed again using a plurality of cameras (4) arranged around the drum (14), until the core (Y) rotates once.

3. The method for automatic acquisition and modeling of a three-dimensional core scene according to claim 2, characterized in that: A camera frame (1) is arranged around the drum (14), and a plurality of cameras (4) are arranged on the inner wall of the camera frame (1). The cameras (4) are arranged along the outer side of the cross section and the outer side of the cylinder of the core (Y).

4. The method for automatic acquisition and modeling of a three-dimensional core scene according to claim 3, characterized in that: The camera frame (1) is a horizontally placed U-shaped frame structure, the cameras (4) on the left and right sides of the U-shaped frame structure are arranged along the outer side of the cross section of the core (Y), and the camera (4) on the bottom side of the U-shaped frame structure is arranged along the outer side of the cylinder of the core (Y).

5. The method for automatic acquisition and modeling of a three-dimensional core scene according to claim 4, characterized in that: The cameras (4) on the left and right sides of the camera frame (1) can be moved and adjusted along the length direction of the core (Y) to take pictures of the cylinder and cross-section of the core (Y) of different lengths.

6. The method for automatically collecting and modeling a three-dimensional core scene according to any one of claims 1 to 5, characterized in that: A light-diffusing plate (2) is arranged on the inner wall of the camera frame (1), and a fill light (5) is arranged inside the light-diffusing plate (2) to adjust the color temperature and brightness according to the environment.

7. The method for automatic acquisition and modeling of a three-dimensional core scene according to claim 6, characterized in that: A light shield (21) is arranged outside the camera frame (1) and the roller (14), and a fill light is turned on under the light shielding condition to take pictures of the cylindrical surface and the cross section of the core (Y).

8. The method for automatically collecting and modeling a three-dimensional core scene according to claim 7, characterized in that: The camera (4) is connected to the computer via a switch (9) and a cable. The power cable in the cable supplies power to the camera (4) and the fill light. The network cable in the cable is connected to the transmission network interface of the camera (4) to control the camera (4) to take pictures and receive the shooting data of the camera (4).

9. The method for automatic acquisition and modeling of a three-dimensional core scene according to claim 8, characterized in that: The roller (14) is connected to a computer via a USB cable, and commands are sent via the computer serial port to control the rotation time, angle and speed of the roller (14).

10. The method for automatic acquisition and modeling of three-dimensional core real scene according to claim 9, characterized in that: The obtained three-dimensional real-scene model of the core is also checked on the server side. If the modeling fails or the modeling effect is not good, the cause of the failure is analyzed and the model is re-photographed.

Images