Quick production and high-definition texture shape-shifting remapping method for immovable cultural relic model
By effectively combining high-precision models without texture with low-precision models with fragmented texture features, and using normal projection method to achieve projection of texture features, the high-precision and high-definition texture problems of three-dimensional models of large grotto temples and tomb cultural relics is solved, and a fast and high-quality data production task is achieved.
Patent Information
- Application Number
- CN202411742891.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-03-25
AI Technical Summary
The existing technology is difficult to meet the high-precision and high-definition texture requirements of three-dimensional models of large grotto temples and tombs at the same time, and the processing method of a single software cannot meet the results indicators required by the cultural and museum industry.
By acquiring the first model without surface fragmented texture features and the second model with fragmented texture features, the texture features of the second model are projected on the first model by using the normal projection method to realize the generation of high-precision models and the spatial positioning of high-definition textures.
It realizes high precision in the structure of the cultural relics model and spatial positioning accuracy of high-definition textures, solves huge data processing problems, improves data processing speed and reduces production time.
Smart Images
Figure CN119693523A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of three-dimensional models of cultural relics, and in particular to a method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping. Background Art
[0002] Large cave temples, tombs and other immovable cultural relics have complex structures and large sizes, covered with exquisite murals, stone brick carvings, imitation wood buildings and colored sculptures, which are inseparable from the cave tombs and have extremely high historical, cultural, scientific and social values. These characteristics and values bring extraordinary technical requirements and processing difficulties to the digital 3D reconstruction of cultural relics. The model results must express the integrity and authenticity of the cultural relics. In general, the relative accuracy of the model must reach ±0.1mm, and the texture accuracy must reach 0.084mm / pixel. Under such technical indicators, data collection, data processing and results display of large cave temples and tombs are extremely difficult.
[0003] Among the related technologies, the method currently commonly used in the digital protection industry of cultural relics is to choose one of the three softwares, PS (Metashape), CC (iTwin Capture Modeler Master) or RC (Reality Capture) to complete digital 3D reconstruction, and most people use PS. The processing method of a single software cannot achieve the performance indicators required by the cultural and museum industry, and the model accuracy and texture resolution cannot be met at the same time. For example, the geometric structure restoration of the model generated by RC is high, but the texture model is generated by calculated colors, and the clarity loss is very obvious relative to the original photo; the texture clarity of the model generated by CC basically maintains the quality of the original photo, but the calculation is affected by the design characteristics of the aerial survey it serves to generate large-area surface planes, and the model's geometric structure and detailed feature accuracy are poor, and the cultural relic body cannot be authentically reconstructed; PS has a slightly stronger ability in aerial triangulation adjustment, but the model's geometric accuracy and texture clarity are relatively weak, and it is not suitable as a complete solution for the digital protection of cultural relics;
[0004] Therefore, it is necessary to provide a new solution and strategy to achieve high-precision three-dimensional reconstruction of large cave tomb relics. Summary of the invention
[0005] The present application provides a method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping, which can solve the problems existing in the above-mentioned prior art.
[0006] In a first aspect, the present application provides a method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping, which adopts the following technical solutions:
[0007] A method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping, the method comprising the following steps:
[0008] Acquire a pre-established first model of the target cultural relic without surface fragmentation texture features; wherein the model construction accuracy of the first model is not less than a preset model accuracy requirement;
[0009] Acquire a pre-established second model of the target cultural relic; wherein the model accuracy of the second model is lower than that of the first model, and the surface of the second model has a fragmented texture feature, and the texture accuracy of the fragmented texture feature is not lower than a preset texture accuracy requirement;
[0010] According to the spatial positioning of the fragmented texture features on the second model, the fragmented texture features are projected onto the first model to obtain a high-precision model that meets the model accuracy requirements and the texture accuracy requirements.
[0011] In combination with the first aspect, in one embodiment, projecting the fragmented texture features onto the first model according to the spatial positioning of the fragmented texture features on the second model to obtain a high-precision model that meets the model accuracy requirements and the texture accuracy requirements includes the following steps:
[0012] Performing UV reconstruction on the first model according to a resolution difference between the first model and the second model;
[0013] According to the spatial positioning of the fragmented texture features on the second model, the fragmented texture features are automatically mapped to the reconstructed first model using a normal projection method to obtain the high-precision model.
[0014] In combination with the first aspect, in one embodiment, obtaining a pre-established first model of the target cultural relic without surface fragmentation texture features comprises the following steps:
[0015] Acquire a multi-source laser scanning point cloud about the target cultural relic, and establish a first point cloud model of the area with missing data based on the multi-source laser scanning point cloud;
[0016] Acquire supplementary data of the data missing area photographed by a mobile photographing device;
[0017] Supplement the first point cloud model according to the supplementary data to obtain a second point cloud model;
[0018] Acquire close-up photography data of the target cultural relic, and combine it with the second point cloud model to form a source data packet for 3D reconstruction of the target cultural relic;
[0019] The first model is established according to the target cultural relic three-dimensional reconstruction source data package.
[0020] In combination with the first aspect, in one implementation, establishing the first model according to the target cultural relic 3D reconstruction source data packet comprises the following steps:
[0021] Dividing the target cultural relic 3D reconstruction source data packet into a plurality of small data packets according to the processing area, and there is an overlap between the small data packets;
[0022] After solving each of the small data packets, they are merged to form the first model.
[0023] In combination with the first aspect, in one embodiment, acquiring a multi-source laser scanning point cloud about a target cultural relic and establishing a first point cloud model of a data missing area based on the multi-source laser scanning point cloud comprises the following steps:
[0024] Acquire a multi-source laser scanning point cloud about a target cultural relic, and perform registration, fusion and positioning on the multi-source laser scanning point cloud;
[0025] Performing aerial triangulation on the registered and complete multi-source laser scanning point cloud, and adding global accuracy control in the aerial triangulation process;
[0026] According to the aerial triangulation calculation results of the multi-source laser scanning point cloud, a first point cloud model with data missing areas is established.
[0027] In combination with the first aspect, in one implementation, the mobile shooting device includes but is not limited to one of a camera and a mobile phone.
[0028] In combination with the first aspect, in one embodiment, obtaining a pre-established second model of the target cultural relic includes the following steps:
[0029] Establishing a CC data project, and based on part of the aerial triangulation calculation results, and on the premise of ensuring the overall aerial triangulation accuracy, controlling the CC project to directly perform reconstruction calculations with local errors, obtaining a second basic model with fragmented texture features, and locating and recording the erroneous part of the second basic model;
[0030] The source data involved in the erroneous part of the second basic model is extracted, and the extracted source data is error processed separately and then three-dimensionally reconstructed to obtain a second model in which the fragmented texture features are processed.
[0031] In the second aspect, the embodiment of the present application provides a device for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping, which adopts the following technical solutions:
[0032] A first model acquisition module is configured to acquire a pre-established first model of the target cultural relic without surface fragmentation texture features; wherein the model construction accuracy of the first model is not less than a preset model accuracy requirement;
[0033] A second model acquisition module is configured to acquire a pre-established second model of the target cultural relic; wherein the model accuracy of the second model is lower than that of the first model, and the surface of the second model has a fragmented texture feature, and the texture accuracy of the fragmented texture feature is not lower than a preset texture accuracy requirement;
[0034] A high-precision model processing module is configured to project the fragmented texture features onto the first model according to the spatial positioning of the fragmented texture features on the second model, so as to obtain a high-precision model that meets the model accuracy requirements and the texture accuracy requirements.
[0035] In a third aspect, the present application provides a device for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping, which adopts the following technical solutions:
[0036] A device for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping, the device comprising a processor, a memory, and a program for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping stored in the memory and executable by the processor, wherein when the program for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping is executed by the processor, the steps of the method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping as described above are implemented.
[0037] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which adopts the following technical solution:
[0038] A computer-readable storage medium stores a program for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping. When the program for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping is executed by a processor, the steps of the method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping as described above are implemented.
[0039] The beneficial effects brought by the technical solution provided by the embodiments of the present application include:
[0040] Through the above scheme, the two relatively imperfect first models and second models obtained by a single software in the related technology are effectively combined. The final model ensures the high precision of the final model structure and the spatial positioning accuracy of the high-definition texture. It fully combines the advantages of various software technologies and solves the problem of processing huge amounts of data caused by the photogrammetry of cultural relics such as large cave tombs.
[0041] At the same time, during the processing process, the whole set of technical methods effectively broke through the traditional processing thinking mode of technical personnel, that is, the inherent thinking and operation paradigm of repeatedly calculating big data due to local small problems, that is, all out-of-limit error problems must be completely solved at all stages before entering the next step of processing. It breaks the whole into parts, bypasses the problem and makes great strides forward, and after solving the problem, it breaks the parts into a whole, completes the texture remapping by changing the shape, and completes the data production task of large-scale cave tomb cultural relics quickly and with high quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0042] Figure 1 This is a flow chart of an embodiment of a method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping of the present application;
[0043] Figure 2 For this application Figure 1 Detailed flow chart of step S100;
[0044] Figure 3 For this application Figure 3 A detailed flow chart of step S1500;
[0045] Figure 4 For this application Figure 1 Detailed flow chart of step S200 in FIG. DETAILED DESCRIPTION
[0046] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0047] Large cave temples, tombs and other immovable cultural relics have complex structures and large sizes, covered with exquisite murals, stone brick carvings, imitation wood buildings and colored sculptures, which are inseparable from the cave tombs and have extremely high historical, cultural, scientific and social values. These characteristics and values bring extraordinary technical requirements and processing difficulties to the digital 3D reconstruction of cultural relics. The model results must express the integrity and authenticity of the cultural relics. In general, the relative accuracy of the model must reach ±0.1mm, and the texture accuracy must reach 0.084mm / pixel. Under such technical indicators, data collection, data processing and results display of large cave temples and tombs are extremely difficult.
[0048] Among the related technologies, the method currently commonly used in the digital protection industry of cultural relics is to choose one of the three softwares, PS (Metashape), CC (iTwin Capture Modeler Master) or RC (Reality Capture) to complete digital 3D reconstruction, and most people use PS. The processing method of a single software cannot achieve the performance indicators required by the cultural and museum industry, and the model accuracy and texture resolution cannot be met at the same time. For example, the geometric structure restoration of the model generated by RC is high, but the texture model is generated by calculated colors, and the clarity loss is very obvious relative to the original photo; the texture clarity of the model generated by CC basically maintains the quality of the original photo, but the calculation is affected by the design characteristics of the aerial survey it serves to generate large-area surface planes, and the model's geometric structure and detailed feature accuracy are poor, and the cultural relic body cannot be authentically reconstructed; PS has a slightly stronger ability in aerial triangulation adjustment, but the model's geometric accuracy and texture clarity are relatively weak, and it is not suitable as a complete solution for the digital protection of cultural relics;
[0049] Therefore, it is necessary to provide a new solution and strategy to achieve high-precision three-dimensional reconstruction of large cave tomb relics.
[0050] Based on the above problems, the present application provides a method for rapid production of immovable cultural relic models and high-definition texture displacement and remapping. The key point of the invention is that it realizes the effective combination of two relatively imperfect first models and second models obtained by a single software in the relevant technology. The final model ensures the high precision of the final model structure and the spatial positioning accuracy of the high-definition texture. It fully combines the advantageous technologies of various software and solves the problem of massive data processing brought about by the photogrammetry of cultural relics such as large grottoes and tombs.
[0051] First, some technical terms in the present application are explained to facilitate those skilled in the art to understand the present application.
[0052] Aerial triangulation calculation: Aerial triangulation calculation
[0053] RC: RealityCapture
[0054] CC:iTwinCaptureModelerMaster
[0055] PS: Metashape
[0056] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.
[0057] In a first aspect, embodiments of the present application provide a method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping.
[0058] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping in this application. Figure 1 As shown, the method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping includes:
[0059] S100, obtaining a pre-established first model of a target cultural relic without surface fragmentation texture features; wherein the model construction accuracy of the first model is not less than a preset model accuracy requirement;
[0060] S200, obtaining a pre-established second model of the target cultural relic; wherein the model accuracy of the second model is lower than that of the first model, and the surface of the second model has a fragmented texture feature, and the texture accuracy of the fragmented texture feature is not lower than a preset texture accuracy requirement;
[0061] S300. Projecting the fragmented texture features onto the first model according to the spatial positioning of the fragmented texture features on the second model, to obtain a high-precision model that meets the model accuracy requirements and the texture accuracy requirements.
[0062] Specifically, step S300 includes the following steps:
[0063] S3100, performing UV reconstruction on the first model according to a resolution difference between the first model and the second model;
[0064] S3200. According to the spatial positioning of the fragmented texture features on the second model, a normal projection method is used to automatically map the fragmented texture features onto the reconstructed first model to obtain the high-precision model.
[0065] This setting realizes the effective combination of the two relatively imperfect first models and second models obtained by a single software in the related technology. The final model ensures the high precision of the final model structure and the spatial positioning accuracy of the high-definition texture.
[0066] Further, in some embodiments, referring to Figure 2 , step S100 includes the following steps:
[0067] S1100, obtaining a multi-source laser scanning point cloud about a target cultural relic, and establishing a first point cloud model having a data missing area based on the multi-source laser scanning point cloud;
[0068] Furthermore, step S1100 includes the following steps:
[0069] S1110, obtaining a multi-source laser scanning point cloud about the target cultural relic, and performing registration, fusion and positioning on the multi-source laser scanning point cloud. Specifically, when entering a large cave tomb, a multi-angle high-density laser scanning process is added, and the multi-source laser scanning point cloud is registered, fused and positioned using onboard software or third-party software.
[0070] S1120, perform aerial triangulation on the complete multi-source laser scanning point cloud after registration, and add global precision control in the aerial triangulation process. Specifically, the complete point cloud of the cultural relic body after registration is imported into the photogrammetry software, and global precision control is added to the photogrammetry aerial triangulation, thereby solving the problem that the image control points can only control the precision of a part of the area, resulting in uneven overall model precision.
[0071] S1130, based on the aerotriangulation calculation results of the multi-source laser scanning point cloud, establish a first point cloud model with data missing areas. Specifically, optical scanning can quickly obtain the overall point cloud, but due to the limitations of the machine operation mode, the front of the structure that cannot be illuminated, the reverse slope of each incision, and especially the back of the complex structure of the cultural relic (such as hollowing) will form data black holes.
[0072] S1200, obtaining supplementary data of the data missing area photographed by a mobile shooting device; specifically, for the data circle area, the missing part of the structural data can be supplemented by data information obtained or photographed by a small and flexible camera or mobile phone. It should be noted that the mobile shooting device includes but is not limited to a camera and a mobile phone.
[0073] S1300, supplementing the first point cloud model according to the supplementary data to obtain a second point cloud model;
[0074] S1400, obtaining close-up photography data of the target cultural relic, and combining it with the second point cloud model to form a source data packet for three-dimensional reconstruction of the target cultural relic; specifically, after forming a complete second point cloud model, the collected high-definition close-up photography data of the target cultural relic itself is supplemented to form a complete source data packet for three-dimensional reconstruction of the cultural relic.
[0075] S1500, establishing the first model according to the target cultural relic three-dimensional reconstruction source data package.
[0076] Among them, refer to Figure 3 , step S1500 includes the following steps:
[0077] S1510, dividing the target cultural relic 3D reconstruction source data packet into a plurality of small data packets according to the processing area, and there is overlap between the small data packets; specifically, through the global control of the laser point cloud, the target cultural relic 3D reconstruction source data packet is distinguished according to the object body in the processing area, and reduced to small data packets of different regions, and a certain degree of overlap of edge structures is guaranteed between the small data packets.
[0078] S1520, after solving each of the small data packets, merge them to form the first model; specifically, after RC solving each of the small data packets, merge the data to form the required high-precision and high-polygon first model.
[0079] This setting implements a data processing method that breaks the whole into parts under the control of global accuracy, further improving the processing efficiency of related models.
[0080] Further, see Figure 4 In some embodiments, step S200 comprises the following steps:
[0081] S2100, establishing a CC data project, and based on part of the aerial triangulation calculation results, and under the premise of ensuring the overall aerial triangulation accuracy, controlling the CC project to directly perform reconstruction calculations with local errors, obtaining a second basic model with fragmented texture features, and locating and recording the erroneous part of the second basic model;
[0082] Specifically, the aerial triangulation results of some small data packets solved by RC in the aforementioned step S1510 can be partially exported as text files, which can be imported into CC after editing. Simply using the calculation results of RC aerial triangulation as known quantities for CC strict adjustment and performing CC aerial triangulation calculations can solve some problems, but at the same time it will inevitably generate new problems, such as holes and staggered layers in the model that are not found in RC. In this step, the problems arising in this link will be ignored. Under the premise of ensuring the overall aerial triangulation accuracy, the CC data project will be allowed to directly perform reconstruction calculations with local errors, and the erroneous parts of the model will be located and recorded.
[0083] S2200, extract the source data involved in the erroneous part of the second basic model, perform three-dimensional reconstruction after error processing on the extracted source data separately, and obtain the second model with fragmented texture feature processing. Specifically, extract the source data involved in the erroneous part, process it separately, and perform three-dimensional reconstruction according to the positioning record in S2100. Finally, the high-definition fragmented texture of the target cultural relic can be obtained. These fragmented textures are pasted on the low-precision model established by the CC project, that is, the second model with fragmented texture features is obtained.
[0084] Finally, through the above scheme, the two relatively imperfect first and second models obtained by a single software in the relevant technology are effectively combined. The final model ensures the high precision of the final model structure and the spatial positioning accuracy of the high-definition texture. It fully combines the advantages of various software technologies and solves the huge data processing problems brought by the photogrammetry of cultural relics such as large cave tombs. At the same time, in the processing process, the whole set of technical methods effectively breaks through the traditional processing thinking mode of technical personnel, that is, the inherent thinking and operation paradigm of dragging big data to calculate repeatedly due to local small problems, that is, all stages must completely solve all excess error problems before entering the next step of processing, breaking the whole into parts, bypassing the problem and making great strides forward, breaking the parts into the whole after solving the problem, and completing the texture remapping by changing the shape and shadow, and quickly and high-quality completing the data production task of large cave tomb cultural relics. Finally, under the same precision and quality, the data processing speed is greatly improved, and the data production time is gradually controlled from uncontrollable. After practice, the original data production of the same type and volume project took more than three months. Using this method, the production task was completed in three weeks, saving a lot of costs.
[0085] In a second aspect, the embodiments of the present application also provide a device for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping.
[0086] In one embodiment, the device for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping comprises:
[0087] A first model acquisition module is configured to acquire a pre-established first model of the target cultural relic without surface fragmentation texture features; wherein the model construction accuracy of the first model is not less than a preset model accuracy requirement;
[0088] A second model acquisition module is configured to acquire a pre-established second model of the target cultural relic; wherein the model accuracy of the second model is lower than that of the first model, and the surface of the second model has a fragmented texture feature, and the texture accuracy of the fragmented texture feature is not lower than a preset texture accuracy requirement;
[0089] A high-precision model processing module is configured to project the fragmented texture features onto the first model according to the spatial positioning of the fragmented texture features on the second model, so as to obtain a high-precision model that meets the model accuracy requirements and the texture accuracy requirements.
[0090] Among them, the functional implementation of each module in the above-mentioned device for rapid production of immovable cultural relics models and high-definition texture shape shifting and remapping corresponds to the steps in the above-mentioned method embodiment for rapid production of immovable cultural relics models and high-definition texture shape shifting and remapping, and their functions and implementation processes will not be repeated here one by one.
[0091] In a third aspect, an embodiment of the present application provides a device for rapidly producing models of immovable cultural relics and remapping high-definition textures. The device for rapidly producing models of immovable cultural relics and remapping high-definition textures can be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.
[0092] In the embodiment of the present application, the device for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping may include a processor, a memory, a communication interface, and a communication bus.
[0093] The communication bus may be of any type and is used to interconnect the processor, the memory, and the communication interface.
[0094] The communication interface includes input / output (I / O) interface, physical interface and logical interface, etc., which are used to realize the interconnection of devices inside the device for rapid production of immovable cultural relics models and high-definition texture shape shifting and remapping, and the interface for interconnecting the device for rapid production of immovable cultural relics models and high-definition texture shape shifting and remapping with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, an optical fiber interface, an ATM interface, etc.; the user device can be a display, a keyboard, etc.
[0095] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.
[0096] The processor may be a general-purpose processor, which may call the immovable cultural relic model rapid production and high-definition texture shape shifting and remapping program stored in the memory, and execute the immovable cultural relic model rapid production and high-definition texture shape shifting and remapping method provided in the embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the immovable cultural relic model rapid production and high-definition texture shape shifting and remapping program is called may refer to the various embodiments of the immovable cultural relic model rapid production and high-definition texture shape shifting and remapping method of the present application, which will not be repeated here.
[0097] Those skilled in the art will appreciate that the hardware structure does not constitute a limitation on the present application, and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.
[0098] In a fourth aspect, an embodiment of the present application also provides a computer-readable storage medium.
[0099] The computer-readable storage medium of the present application stores a program for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping. When the program for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping is executed by a processor, the steps of the method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping as described above are implemented.
[0100] Among them, the method implemented when the immovable cultural relic model rapid production and high-definition texture shape shifting and remapping program is executed can refer to the various embodiments of the immovable cultural relic model rapid production and high-definition texture shape shifting and remapping method of the present application, and will not be repeated here.
[0101] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.
[0102] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.
[0103] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.
[0104] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.
[0105] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.
[0106] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.
[0107] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. A method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping, characterized in that: The method comprises the following steps: Acquire a pre-established first model of the target cultural relic without surface fragmentation texture features; wherein the model construction accuracy of the first model is not less than a preset model accuracy requirement; Acquire a pre-established second model of the target cultural relic; wherein the model accuracy of the second model is lower than that of the first model, and the surface of the second model has a fragmented texture feature, and the texture accuracy of the fragmented texture feature is not lower than a preset texture accuracy requirement; According to the spatial positioning of the fragmented texture features on the second model, the fragmented texture features are projected onto the first model to obtain a high-precision model that meets the model accuracy requirements and the texture accuracy requirements.
2. The method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping as claimed in claim 1, characterized in that: The method of projecting the fragmented texture features onto the first model according to the spatial positioning of the fragmented texture features on the second model to obtain a high-precision model that meets the model accuracy requirements and the texture accuracy requirements includes the following steps: Performing UV reconstruction on the first model according to a resolution difference between the first model and the second model; According to the spatial positioning of the fragmented texture features on the second model, the fragmented texture features are automatically mapped to the reconstructed first model using a normal projection method to obtain the high-precision model.
3. The method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping as claimed in claim 1, characterized in that: The step of obtaining a pre-established first model of the target cultural relic without surface fragmentation texture features comprises the following steps: Acquire a multi-source laser scanning point cloud about the target cultural relic, and establish a first point cloud model of the area with missing data based on the multi-source laser scanning point cloud; Acquire supplementary data of the data missing area photographed by a mobile photographing device; Supplement the first point cloud model according to the supplementary data to obtain a second point cloud model; Acquire close-up photography data of the target cultural relic, and combine it with the second point cloud model to form a source data packet for 3D reconstruction of the target cultural relic; The first model is established according to the target cultural relic three-dimensional reconstruction source data package.
4. The method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping as claimed in claim 3, characterized in that: The step of establishing the first model according to the target cultural relic three-dimensional reconstruction source data packet comprises the following steps: Dividing the target cultural relic 3D reconstruction source data packet into a plurality of small data packets according to the processing area, and there is an overlap between the small data packets; After solving each of the small data packets, they are merged to form the first model.
5. The method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping as claimed in claim 3, characterized in that: The step of acquiring a multi-source laser scanning point cloud about a target cultural relic and establishing a first point cloud model of a data missing area based on the multi-source laser scanning point cloud comprises the following steps: Acquire a multi-source laser scanning point cloud about a target cultural relic, and perform registration, fusion and positioning on the multi-source laser scanning point cloud; Performing aerial triangulation on the registered and complete multi-source laser scanning point cloud, and adding global accuracy control in the aerial triangulation process; According to the aerial triangulation calculation results of the multi-source laser scanning point cloud, a first point cloud model with data missing areas is established.
6. The method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping as claimed in claim 3, characterized in that: The mobile shooting device includes but is not limited to a camera and a mobile phone.
7. The method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping as claimed in claim 5, characterized in that: The step of obtaining a pre-established second model of the target cultural relic comprises the following steps: Establishing a CC data project, and based on part of the aerial triangulation calculation results, and on the premise of ensuring the overall aerial triangulation accuracy, controlling the CC project to directly perform reconstruction calculations with local errors, obtaining a second basic model with fragmented texture features, and locating and recording the erroneous part of the second basic model; The source data involved in the erroneous part of the second basic model is extracted, and the extracted source data is error processed separately and then three-dimensionally reconstructed to obtain a second model in which the fragmented texture features are processed.
8. A device for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping, characterized in that: The device comprises: A first model acquisition module is configured to acquire a pre-established first model of the target cultural relic without surface fragmentation texture features; wherein the model construction accuracy of the first model is not less than a preset model accuracy requirement; A second model acquisition module is configured to acquire a pre-established second model of the target cultural relic; wherein the model accuracy of the second model is lower than that of the first model, and the surface of the second model has a fragmented texture feature, and the texture accuracy of the fragmented texture feature is not lower than a preset texture accuracy requirement; A high-precision model processing module is configured to project the fragmented texture features onto the first model according to the spatial positioning of the fragmented texture features on the second model, so as to obtain a high-precision model that meets the model accuracy requirements and the texture accuracy requirements.
9. A device for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping, characterized in that: The device for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping comprises a processor, a memory, and a program for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping stored in the memory and executable by the processor. When the program for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping is executed by the processor, the steps of the method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping as claimed in any one of claims 1 to 7 are implemented.
10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping. When the program for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping is executed by a processor, the steps of the method for rapid production of immovable cultural relic models and high-definition texture shape shifting and remapping as described in any one of claims 1 to 7 are implemented.