Method and system for census of cultural relics

Abstract

The invention discloses a cultural relic census method and system, and relates to the technical field of cultural relic census, and the method comprises the steps: exploring a cultural relic census region, and designing a cultural relic scanning route; collecting cultural relic data by using a cultural relic census tool; integrating the cultural relic data to generate a cultural relic data set, and preprocessing the cultural relic data set; constructing a triangular mesh model of the cultural relics, and performing visual display; and encrypting and storing the cultural relic data. According to the method, a cultural relic census tool integrating high-precision RTK + mobile SLAM three-dimensional laser scanning, aircraft panoramic shooting and an operation handbook is used, so that accurate capture of three-dimensional space information of cultural relics is realized, and acquired cultural relic data has relatively high detail fidelity; meanwhile, accurate form restoration in subsequent model construction is supported, the data acquisition process is more flexible due to the portability and multifunctionality of the census tool, and the census tool can adapt to different cultural relic types and environmental conditions, so that the efficiency and applicability of cultural relic census work are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cultural relics survey, and in particular to a method and system for cultural relics survey. Background Art

[0002] As time goes by, cultural heritage faces many threats such as natural erosion, man-made destruction and information loss. The cultural relics census is an important basic work for protecting the country's non-renewable cultural resources and an important measure to ensure the safety of the country's historical and cultural heritage.

[0003] Traditional cultural relics survey methods, such as manual field surveys, hand-drawn maps, paper records, etc., although they have historical value, have gradually shown limitations in terms of efficiency, accuracy and data management. These methods are not only time-consuming and labor-intensive, but also have poor application effects in large-scale and complex environments, and are difficult to meet the growing demand for cultural heritage protection in modern society. In the field of cultural relics survey, with the continuous development of science and technology, various new technologies have been gradually applied to the investigation, measurement, recording and protection of cultural relics. Among them, high-precision measurement technology and three-dimensional scanning technology are particularly critical. They provide unprecedented data accuracy and richness for cultural relics surveys. Although modern scientific and technological means such as remote sensing, drone surveys, and three-dimensional scanning are used in cultural relics surveys, these technologies still have limitations. For example, three-dimensional laser scanning technology: Although it can provide high-precision three-dimensional data, it usually requires professional manual operation and is relatively inefficient. For some complex cultural relic structures or hidden cultural relic sites, these technologies may not be able to provide sufficiently accurate data. Drone photography technology: It can complete high-definition image shooting of cultural relics, but the acquisition of details and structural information of cultural relics is limited. Summary of the invention

[0004] In view of the problems existing in the above-mentioned existing methods for surveying cultural relics, the present invention is proposed.

[0005] Therefore, the problem to be solved by the present invention is that the traditional cultural relics survey requires professional personnel to operate, is inefficient, and cannot provide sufficiently accurate cultural relics data.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a method for cultural relics survey, which includes: exploring a cultural relics survey area and designing a cultural relics scanning route; using a cultural relics survey tool to collect cultural relics data; integrating the cultural relics data to generate a cultural relics data set and preprocessing the cultural relics data set; constructing a cultural relics triangular mesh model for visual display; and encrypting and storing the cultural relics data.

[0007] As a preferred embodiment of the method for cultural relics survey of the present invention, the method of exploring the cultural relics survey area and designing the cultural relics scanning route includes:

[0008] The cultural relics survey site is surveyed using a cultural relics survey tool to obtain preliminary distribution of cultural relics and surrounding environment data. Based on the survey results, the environmental modeling tool is used to digitally model the cultural relics survey scene to generate a three-dimensional environmental model. The cultural relics survey tool integrates high-precision RTK, mobile SLAM three-dimensional laser scanning, high-definition camera aircraft platform and integrated operation manual;

[0009] Set up an RTK base station at the cultural relics survey site, and perform synchronous calibration between the RTK base station and the RTK mobile station through an integrated operation handbook;

[0010] Based on the three-dimensional environmental model, the scanning route is set, the cultural relics survey tools are transported to the cultural relics survey site and debugged.

[0011] As a preferred solution of the method for cultural relics survey of the present invention, the method of collecting cultural relics data using the cultural relics survey tool includes:

[0012] Start the cultural relics survey tool through the integrated operation manual, and set the scanning parameters according to the on-site survey results and scanning route, including laser emission frequency, scanning speed, point cloud resolution and image acquisition frequency;

[0013] Connect the cultural relics survey tool to the RTK base station set up on site to perform synchronous calibration of the RTK base station and mobile station;

[0014] Use high-precision RTK+mobile SLAM three-dimensional laser scanning to collect coordinates and scan point cloud models of cultural relics, obtain the coordinates and point cloud data of cultural relics, and simultaneously use a high-definition camera aircraft platform to take panoramic photos of the cultural relics according to a preset flight route to obtain multi-angle images of the cultural relics, and use Photoshop to splice the multi-angle images of the cultural relics into a panoramic image. The high-precision RTK+mobile SLAM three-dimensional laser scanning includes a controller, image acquisition, RTK and laser scanning, and the high-definition camera aircraft platform includes wings, a main body, a controller and a high-definition panoramic camera.

[0015] As a preferred solution of the method for cultural relics survey of the present invention, the step of integrating cultural relics data to generate a cultural relics data set and preprocessing the cultural relics data set includes:

[0016] Uploading the collected cultural relic point cloud data, cultural relic coordinates and cultural relic panoramic images to the data integration management platform by using an integrated operation handbook to generate a cultural relic data set, pre-processing the cultural relic data set and storing it in a database, wherein the pre-processing of the cultural relic data set includes point cloud data processing, cultural relic coordinate processing and panoramic image processing;

[0017] For the collected cultural relics point cloud data, remove noise points, perform point cloud data sparseness, and perform data alignment and calibration;

[0018] The noise point removal refers to identifying and removing noise points through statistical analysis methods and spatial neighborhood search;

[0019] The point cloud data sparse processing refers to dividing the point cloud data into three-dimensional grids through voxel grid filtering, and selecting representative points in each grid to perform sparse processing on high-density point cloud data;

[0020] The data alignment and calibration refers to registering the point cloud data using an iterative closest point ICP algorithm;

[0021] Standardize the coordinate data of the collected cultural relics and unify all the coordinate data of the cultural relics into the global coordinate system;

[0022] Perform color calibration and distortion correction on the collected panoramic image data of cultural relics;

[0023] The color calibration refers to adjusting the color of the panoramic image of the cultural relics to a unified standard;

[0024] The distortion correction refers to eliminating geometric distortion in the panoramic image of cultural relics through bilinear interpolation.

[0025] As a preferred solution of the method for cultural relics survey of the present invention, the construction of the cultural relics triangular mesh model includes:

[0026] Based on the pre-processed cultural relic point cloud data, the Delaunay triangulation algorithm is used to convert the cultural relic point cloud data into a triangular mesh model, and the Laplace smoothing algorithm is used to smooth the generated triangular mesh model;

[0027] The preprocessed panoramic image data of the cultural relics is mapped to the triangular mesh model of the cultural relics. The three-dimensional model is unfolded onto a two-dimensional plane using UV unfolding technology. Texture coordinates are assigned to each triangular face. The triangular mesh model of the cultural relics is rendered using the rendering engine Cycles in the three-dimensional modeling software Blender, and the lighting conditions, material properties and environment map are set.

[0028] As a preferred solution of the method for cultural relics survey of the present invention, the visual display includes:

[0029] Collect user requirements and design the layout of the visualization interface, including the 3D model display area, control panel and toolbar. Use HTML tags to define the basic structure of the visualization interface and use CSS for style design.

[0030] Use Three.js to create a 3D scene and configure a perspective camera. Add different types of light sources, including ambient light, parallel light, and point light. Import the cultural relic triangular mesh model into the 3D scene and align the center of the cultural relic triangular mesh model with the perspective camera. Adjust the scale of the cultural relic triangular mesh model according to the size of the 3D scene and the viewing angle of the perspective camera. Integrate the cultural relic triangular mesh model into the Web server. Connect the Web server through the integrated operation manual to display the cultural relic data and the cultural relic triangular mesh model.

[0031] As a preferred solution of the method for cultural relics survey of the present invention, the encrypted storage of cultural relics data includes:

[0032] Use symmetric encryption algorithms to encrypt cultural relics data, generate keys including public keys and private keys, store the keys in a key management system, rotate the keys regularly, and use the recipient's private key to decrypt when accessing data;

[0033] The distributed storage system GlusterFS is used to store cultural relic data, a multi-level backup strategy is used, and data integrity verification is performed regularly on the backed-up cultural relic data. The multi-level backup strategy includes local backup and off-site backup.

[0034] Another object of the present invention is to provide a system for cultural relics survey, which comprises:

[0035] Scene exploration module, used to collect scene information of cultural relics survey and plan scanning routes;

[0036] Data collection module, used to collect cultural relics data and perform pre-processing;

[0037] Model building module, used to build a triangular mesh model of cultural relics;

[0038] Visualization module, used to display the triangular mesh model of cultural relics and interact with users;

[0039] Data encryption and storage module, used to encrypt and store cultural relics data.

[0040] A computer device comprises: a memory and a processor; the memory stores a computer program, and the processor implements the steps of a method for cultural relics survey when executing the computer program.

[0041] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of a method for cultural relics survey.

[0042] The beneficial effects of the present invention are as follows: the present invention collects cultural relics data by using a new cultural relics survey tool, which integrates a high-precision RTK+mobile SLAM three-dimensional laser scanning system, an aircraft panoramic shooting system and an integrated operation manual, thereby realizing accurate capture of the three-dimensional spatial information of cultural relics, so that the collected cultural relic data has high detail fidelity, and also supports accurate morphological restoration in subsequent model construction. At the same time, the portability and versatility of the survey tool make the data collection process more flexible, and can adapt to different cultural relics types and environmental conditions, thereby improving the efficiency and applicability of the cultural relics survey work. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0044] Figure 1 This is a flowchart of the cultural relics survey method.

[0045] Figure 2 This is a schematic diagram of the implementation process of the cultural relics survey tool.

[0046] Figure 3 This is a structural diagram of the cultural relics survey tool.

[0047] Figure 4 This is a schematic diagram of the structure taken with a drone.

[0048] Figure 5 This is a structural diagram of high-precision RTK+mobile SLAM three-dimensional laser scanning.

[0049] Figure 6 This is a structural diagram of the cultural relics survey system. DETAILED DESCRIPTION

[0050] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0051] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0052] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0053] Example 1

[0054] Reference Figure 1 , Figure 2 and Figure 3 , which is the first embodiment of the present invention, and which provides a method for cultural relics survey, the method for cultural relics survey includes:

[0055] S1. Explore the cultural relics survey area and design the cultural relics scanning route;

[0056] Furthermore, the exploration of cultural relics survey areas and the design of cultural relics scanning routes include:

[0057] The cultural relics survey site is surveyed using a cultural relics survey tool to obtain preliminary distribution of cultural relics and surrounding environment data. Based on the survey results, the environmental modeling tool is used to digitally model the cultural relics survey scene to generate a three-dimensional environmental model. The cultural relics survey tool integrates high-precision RTK, mobile SLAM three-dimensional laser scanning, high-definition camera aircraft platform and integrated operation manual;

[0058] Set up an RTK base station at the cultural relics survey site, and perform synchronous calibration between the RTK base station and the RTK mobile station through an integrated operation handbook;

[0059] Based on the three-dimensional environmental model, the scanning route is set, the cultural relics survey tools are transported to the cultural relics survey site and debugged.

[0060] Through the exploration of the cultural relics survey area, we can have a comprehensive understanding of the terrain features, cultural relics distribution, environmental conditions, etc. in the area. This step combines a variety of data sources, such as historical records, geographic information systems, satellite images, and drone aerial photography data, to analyze the possible distribution of cultural relics in the area from multiple angles. When designing the cultural relics scanning route, we can take into account the cultural value, geographical location and environmental factors of different cultural relics to develop the optimal scanning path, ensure the high accuracy of the cultural relics survey, maximize the coverage of the cultural relics survey, and avoid missed scans and repeated scans due to improper route design. Through scientific scanning route design, we can effectively optimize resource allocation, make the scheduling of survey equipment and personnel more reasonable, ensure the efficient conduct of the survey work, and save time and costs.

[0061] S2. Use cultural relics survey tools to collect cultural relics data;

[0062] Furthermore, the use of cultural relics survey tools to collect cultural relics data includes:

[0063] Start the cultural relics survey tool through the integrated operation manual, and set the scanning parameters according to the on-site survey results and scanning route, including laser emission frequency, scanning speed, point cloud resolution and image acquisition frequency;

[0064] Connect the cultural relics survey tool to the RTK base station set up on site to perform synchronous calibration of the RTK base station and mobile station;

[0065] Use high-precision RTK+mobile SLAM three-dimensional laser scanning to collect coordinates and scan point cloud models of cultural relics, obtain the coordinates and point cloud data of cultural relics, and simultaneously use a high-definition camera aircraft platform to take panoramic photos of the cultural relics according to a preset flight route to obtain multi-angle images of the cultural relics, and use Photoshop to splice the multi-angle images of the cultural relics into a panoramic image. The high-precision RTK+mobile SLAM three-dimensional laser scanning includes a controller, image acquisition, RTK and laser scanning, and the high-definition camera aircraft platform includes wings, a main body, a controller and a high-definition panoramic camera.

[0066] The cultural relics survey tool is started through the integrated operation manual, and the laser emission frequency, scanning speed, point cloud resolution and image acquisition frequency are set according to the on-site exploration results and scanning routes, realizing a high degree of customization of the data collection process, and adjusting for different types of cultural relics and environmental conditions to ensure that the collected data has the highest accuracy and resolution. This flexible parameter setting method improves the adaptability and accuracy of the cultural relics survey work, ensuring that high-quality cultural relics data can be obtained under different conditions. By using high-precision RTK+ mobile SLAM technology to collect coordinates and scan point cloud models of cultural relics, a comprehensive and detailed record of cultural relics data is achieved, ensuring that every detail of the cultural relics can be accurately recorded, thereby providing high-quality original data for the subsequent construction of cultural relics 3D models, ensuring the realism and accuracy of the model. In addition, by using drones for multi-angle shooting, the details of cultural relics under different light and perspectives can be captured, and the stitched panoramic image provides a complete visual presentation, which not only enriches the digital record of cultural relics, but also improves the display effect of cultural relics on digital platforms, allowing viewers to observe the details of cultural relics from multiple angles, enhancing the educational and display value of cultural relics, and providing researchers with richer visual materials.

[0067] S3, integrating cultural relic data to generate a cultural relic data set and preprocessing the cultural relic data set;

[0068] Furthermore, integrating the cultural relic data to generate a cultural relic data set and preprocessing the cultural relic data set includes:

[0069] Uploading the collected cultural relic point cloud data, cultural relic coordinates and cultural relic panoramic images to the data integration management platform by using an integrated operation handbook to generate a cultural relic data set, pre-processing the cultural relic data set and storing it in a database, wherein the pre-processing of the cultural relic data set includes point cloud data processing, cultural relic coordinate processing and panoramic image processing;

[0070] For the collected cultural relics point cloud data, remove noise points, perform point cloud data sparseness, and perform data alignment and calibration;

[0071] The noise point removal refers to identifying and removing noise points through statistical analysis methods and spatial neighborhood search;

[0072] The point cloud data sparse processing refers to dividing the point cloud data into three-dimensional grids through voxel grid filtering, and selecting representative points in each grid to perform sparse processing on high-density point cloud data;

[0073] The data alignment and calibration refers to registering the point cloud data using an iterative closest point ICP algorithm;

[0074] Standardize the coordinate data of the collected cultural relics and unify all the coordinate data of the cultural relics into the global coordinate system;

[0075] Perform color calibration and distortion correction on the collected panoramic image data of cultural relics;

[0076] The color calibration refers to adjusting the color of the panoramic image of the cultural relics to a unified standard to ensure the color consistency of the image under different lighting conditions;

[0077] The distortion correction refers to eliminating the geometric distortion in the panoramic image of the cultural relics through a bilinear interpolation method, so as to restore the image to its true form.

[0078] By using the integrated operation manual, the collected cultural relics point cloud data, cultural relics coordinates and cultural relics panoramic images are uploaded to the data integration management platform to generate a unified cultural relics data set, integrating data from different sources and different types, and realizing standardized data management. It can effectively organize and manage cultural relics data, ensure the orderly storage and easy retrieval of data, and the unified cultural relics data set not only simplifies the subsequent data processing process, but also improves the operability of the data, providing convenient conditions for the research, protection and display of cultural relics. In addition, by preprocessing the collected cultural relics data, the high accuracy and consistency of the cultural relics data are ensured, the reliability and integrity of the cultural relics data are improved, and a solid technical foundation is provided for subsequent data analysis, three-dimensional model construction and display, which is conducive to the in-depth development of cultural relics protection, research and dissemination.

[0079] S4, constructing a triangular mesh model of cultural relics for visual display;

[0080] Furthermore, constructing the cultural relic triangular mesh model includes:

[0081] Based on the pre-processed cultural relic point cloud data, the Delaunay triangulation algorithm is used to convert the cultural relic point cloud data into a triangular mesh model, and the Laplace smoothing algorithm is used to smooth the generated triangular mesh model to eliminate noise and irregular parts;

[0082] The preprocessed panoramic image data of the cultural relics is mapped to the triangular mesh model of the cultural relics. The three-dimensional model is unfolded onto a two-dimensional plane using UV unfolding technology. Texture coordinates are assigned to each triangular face. The triangular mesh model of the cultural relics is rendered using the rendering engine Cycles in the three-dimensional modeling software Blender. The lighting conditions, material properties and environment maps are set to simulate real lighting effects.

[0083] Based on the pre-processed cultural relic point cloud data, the Delaunay triangulation algorithm is used to convert the cultural relic point cloud data into a triangular mesh model, thereby realizing efficient meshing of the point cloud data. The Delaunay triangulation algorithm has the characteristic of generating "optimal triangles", which can maximize the minimum angle and avoid generating overly sharp or distorted triangles. This ensures the stability and geometric accuracy of the mesh model, so that the model can maintain a high quality in the subsequent processing and rendering process, avoids calculation errors and visual distortion, and ensures that the model can accurately reflect the shape and details of the cultural relics. In addition, the generated triangular mesh model is smoothed by using the Laplace smoothing algorithm to eliminate noise and irregular parts, which effectively improves the smoothness and visual effect of the model, making the model smoother and more realistic, laying a solid foundation for subsequent rendering and display. Finally, through UV unfolding technology and rendering engine Cycles, the realism and texture accuracy of the model are further enhanced, and the high-precision digital restoration of cultural relics is realized, which provides strong technical support for the display, protection and research of cultural relics, and effectively enhances the cultural communication and educational value of cultural relics.

[0084] Furthermore, the visualization includes:

[0085] Collect user requirements and design the layout of the visualization interface, including the 3D model display area, control panel and toolbar. Use HTML tags to define the basic structure of the visualization interface and use CSS for style design.

[0086] Use Three.js to create a 3D scene and configure a perspective camera. Add different types of light sources, including ambient light, parallel light, and point light. Import the cultural relic triangular mesh model into the 3D scene and align the center of the cultural relic triangular mesh model with the perspective camera. Adjust the scale of the cultural relic triangular mesh model according to the size of the 3D scene and the viewing angle of the perspective camera. Integrate the cultural relic triangular mesh model into the Web server. Connect the Web server through the integrated operation manual to display the cultural relic data and the cultural relic triangular mesh model.

[0087] By collecting user needs and designing a visual interface layout, users can easily access and operate cultural relic models, which can improve the user's operating experience. The cultural relic display is no longer a single visual presentation, but a multi-dimensional experience platform with strong interactivity and high operability. By using HTML, CSS and Three.js to build a visualization platform to interact with users, the cultural relic model is made more realistic, which improves the display effect of cultural relics and the user's operating experience, provides strong technical support for the research, education and cultural dissemination of cultural relics, and greatly expands the social influence and audience of cultural relics.

[0088] S5. Encrypt and store cultural relics data;

[0089] Furthermore, encrypting and storing cultural relics data includes:

[0090] Use symmetric encryption algorithms to encrypt cultural relics data, generate keys including public keys and private keys, store the keys in a key management system, rotate the keys regularly, and use the recipient's private key to decrypt when accessing data;

[0091] The distributed storage system GlusterFS is used to store cultural relic data, a multi-level backup strategy is used, and data integrity verification is performed regularly on the backed-up cultural relic data. The multi-level backup strategy includes local backup and off-site backup.

[0092] By using symmetric encryption algorithms and key management systems, the security of data access and the effectiveness of key management are enhanced. Keys are replaced regularly to further improve the security of the system. Even if a key is leaked, a new key will be replaced in time to reduce potential security risks. In addition, a multi-level backup strategy is used to back up cultural relics data, including local backup and off-site backup, to ensure the security and recovery capabilities of data in various disaster situations. Local backup can quickly restore data and reduce the risk of data loss due to accidental deletion or hardware failure. Off-site backup stores data at sites with different geographical locations, effectively preventing global data loss due to force majeure such as natural disasters and fires, ensuring the security, reliability and availability of cultural relics data during storage and transmission, providing a solid foundation for cultural relics protection, research and digital management, and greatly improving the security management level of cultural relics data.

[0093] Example 2

[0094] Reference Figure 3 , which is the second embodiment of the present invention, is different from the previous embodiment and provides a system for cultural relics survey, including:

[0095] Scene exploration module, used to collect scene information of cultural relics survey and plan scanning routes;

[0096] Data collection module, used to collect cultural relics data and perform pre-processing;

[0097] Model building module, used to build a triangular mesh model of cultural relics;

[0098] Visualization module, used to display the triangular mesh model of cultural relics and interact with users;

[0099] Data encryption and storage module, used to encrypt and store cultural relics data.

[0100] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0101] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0102] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0103] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used to implement: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0104] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for surveying cultural relics, characterized in that: include, Explore the cultural relics survey area and design the cultural relics scanning route; Use cultural relics survey tools to collect cultural relics data; Integrate cultural relic data to generate cultural relic data sets and preprocess the cultural relic data sets; Construct a triangular mesh model of cultural relics for visual display; The cultural relics data is encrypted and stored.

2. The method for cultural relics survey as claimed in claim 1, characterized in that: The exploration of cultural relics survey area and design of cultural relics scanning route include: The cultural relics survey site is surveyed using a cultural relics survey tool to obtain preliminary distribution of cultural relics and surrounding environment data. Based on the survey results, the environmental modeling tool is used to digitally model the cultural relics survey scene to generate a three-dimensional environmental model. The cultural relics survey tool integrates high-precision RTK, mobile SLAM three-dimensional laser scanning, high-definition camera aircraft platform and integrated operation manual; Set up an RTK base station at the cultural relics survey site, and perform synchronous calibration between the RTK base station and the RTK mobile station through an integrated operation handbook; Based on the three-dimensional environmental model, the scanning route is set, the cultural relics survey tools are transported to the cultural relics survey site and debugged.

3. The method for cultural relics survey as claimed in claim 2, characterized in that: The use of cultural relics survey tools to collect cultural relics data includes: Start the cultural relics survey tool through the integrated operation manual, and set the scanning parameters according to the on-site survey results and scanning route, including laser emission frequency, scanning speed, point cloud resolution and image acquisition frequency; Connect the cultural relics survey tool to the RTK base station set up on site to perform synchronous calibration of the RTK base station and mobile station; Use high-precision RTK+mobile SLAM three-dimensional laser scanning to collect coordinates and scan point cloud models of cultural relics, obtain the coordinates and point cloud data of cultural relics, and simultaneously use a high-definition camera aircraft platform to take panoramic photos of the cultural relics according to a preset flight route to obtain multi-angle images of the cultural relics, and use Photoshop to splice the multi-angle images of the cultural relics into a panoramic image. The high-precision RTK+mobile SLAM three-dimensional laser scanning includes a controller, image acquisition, RTK and laser scanning, and the high-definition camera aircraft platform includes wings, a main body, a controller and a high-definition panoramic camera.

4. The method for cultural relics survey as claimed in claim 3, characterized in that: The integrating cultural relic data to generate a cultural relic data set and preprocessing the cultural relic data set comprises: Uploading the collected cultural relic point cloud data, cultural relic coordinates and cultural relic panoramic images to the data integration management platform by using an integrated operation handbook to generate a cultural relic data set, pre-processing the cultural relic data set and storing it in a database, wherein the pre-processing of the cultural relic data set includes point cloud data processing, cultural relic coordinate processing and panoramic image processing; For the collected cultural relics point cloud data, remove noise points, perform point cloud data sparseness, and perform data alignment and calibration; The noise point removal refers to identifying and removing noise points through statistical analysis methods and spatial neighborhood search; The point cloud data sparse processing refers to dividing the point cloud data into three-dimensional grids through voxel grid filtering, and selecting representative points in each grid to perform sparse processing on high-density point cloud data; The data alignment and calibration refers to registering the point cloud data using an iterative closest point ICP algorithm; Standardize the coordinate data of the collected cultural relics and unify all the coordinate data of the cultural relics into the global coordinate system; Perform color calibration and distortion correction on the collected panoramic image data of cultural relics; The color calibration refers to adjusting the color of the panoramic image of the cultural relics to a unified standard; The distortion correction refers to eliminating geometric distortion in the panoramic image of cultural relics through bilinear interpolation.

5. The method for cultural relics survey as claimed in claim 4, characterized in that: The said constructing the cultural relics triangular mesh model comprises: Based on the pre-processed cultural relic point cloud data, the Delaunay triangulation algorithm is used to convert the cultural relic point cloud data into a triangular mesh model, and the Laplace smoothing algorithm is used to smooth the generated triangular mesh model; The preprocessed panoramic image data of the cultural relics is mapped to the triangular mesh model of the cultural relics. The three-dimensional model is unfolded onto a two-dimensional plane using UV unfolding technology. Texture coordinates are assigned to each triangular face. The triangular mesh model of the cultural relics is rendered using the rendering engine Cycles in the three-dimensional modeling software Blender, and the lighting conditions, material properties and environment map are set.

6. The method for cultural relics survey as claimed in claim 5, characterized in that: The visual display comprises: Collect user requirements and design the layout of the visualization interface, including the 3D model display area, control panel and toolbar. Use HTML tags to define the basic structure of the visualization interface and use CSS for style design. Use Three.js to create a 3D scene and configure a perspective camera. Add different types of light sources, including ambient light, parallel light, and point light. Import the cultural relic triangular mesh model into the 3D scene and align the center of the cultural relic triangular mesh model with the perspective camera. Adjust the scale of the cultural relic triangular mesh model according to the size of the 3D scene and the viewing angle of the perspective camera. Integrate the cultural relic triangular mesh model into the Web server. Connect the Web server through the integrated operation manual to display the cultural relic data and the cultural relic triangular mesh model.

7. The method for cultural relics survey as claimed in claim 6, characterized in that: The encrypted storage of cultural relic data includes: Use symmetric encryption algorithms to encrypt cultural relics data, generate keys including public keys and private keys, store the keys in a key management system, rotate the keys regularly, and use the recipient's private key to decrypt when accessing data; The distributed storage system GlusterFS is used to store cultural relic data, a multi-level backup strategy is used, and data integrity verification is performed regularly on the backed-up cultural relic data. The multi-level backup strategy includes local backup and off-site backup.

8. A system for cultural relics survey based on the method for cultural relics survey according to any one of claims 1 to 7, characterized in that: include, Scene exploration module, used to collect information about cultural relics survey scenes and plan scanning routes; Data collection module, used to collect cultural relics data and perform pre-processing; Model building module, used to build a triangular mesh model of cultural relics; Visualization module, used to display the triangular mesh model of cultural relics and interact with users; Data encryption and storage module, used to encrypt and store cultural relics data.

9. A computer device comprising: A memory and a processor; the memory stores a computer program, wherein the processor implements the steps of the method for cultural relics survey described in any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for cultural relics survey according to any one of claims 1 to 7 are implemented.

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