Analysis of Color Landscape Characteristics in“Beautiful Village”of China Based on 3D Real Scene Models

Color,as a significant element of village landscapes,serves various functions such as enhancing aesthetic appeal and attractiveness,conveying emotions and cultural values.To explore the three-dimensional spatial characteristics of color landscapes in beautiful villages,this study conducted a comparative experiment involving eight provinciallevel beautiful villages and eight ordinary villages in Jinzhai County.Landscape pattern indices were used to analyze the color landscape patterns on the facades of these villages,complemented by a quantitative analysis of color attributes using theMunsell color system.The results indicate that(1)Natural landscape colors in beautiful villages are primarily concentrated in the yellow-red to green-yellow interval,while those in ordinary villages are widely distributed in the red to blue-green interval.Artificial landscape colors in beautiful villages aremainly characterized by medium value,with chroma concentrated in the low chroma range.(2)The proportion of color areas for forests,grasslands,and building walls in beautiful villages is higher by 14.76%,2.17%,and 5.16%,respectively,compared to ordinary villages.However,the proportion of yellow exposed areas in ordinary villages ismore than twice that of beautiful villages.(3)The Landscape Shape Index for forests,grasslands,and buildings in beautiful villages is 5.23,8.01,and 8.19,respectively,indicating a higher irregularity in color patches.(4)Ordinary villages exhibit a higher Shannon’s diversity index,indicating amore complex distribution of colors,whereas beautiful villages demonstrate a higher number of connected dominant patches.This study can provide a scientific basis for village color planning and layout.

Three-Dimensional Scene Encryption Algorithm Based on Phase Iteration Algorithm of the Angular-Spectral Domain

In order to increase the capacity of encrypted information and reduce the loss of information transmission, a three-dimensional(3 D) scene encryption algorithm based on the phase iteration of the angular spectrum domain is proposed in this paper. The algorithm, which adopts the layer-oriented method, generates the computer generated hologram by encoding the three-dimensional scene. Then the computer generated hologram is encoded into three pure phase functions by adopting the phase iterative algorithm based on angular spectrum domain,and the encryption process is completed. The three-dimensional scene encryption can improve the capacity of the information,and the three-phase iterative algorithm can guarantee the security of the encryption information. The numerical simulation results show that the algorithm proposed in this paper realized the encryption and decryption of three-dimensional scenes. At the same time, it can ensure the safety of the encrypted information and increase the capacity of the encrypted information.

Three-Dimensional Scenes Restore Using Digital Image

Encryption and decryption method of three-dimensional objects uses holograms computer-generated and suggests encoding stage. Information obtained amplitude and phase of a three-dimensional object using mathematically stage transforms overlap stored on a digital computer. Different three-dimensional images restore and develop the system for the expansion of the three-dimensional scenes and camera movement parameters. This article talks about these kinds of digital image processing algorithms as the reconstruction of three-dimensional model of the scene. In the present state, many such algorithms need to be improved in this paper proposing one of the options to improve the accuracy of such reconstruction.

Three-Dimensional Nonlinear Dynamic Model and Macro Control of Real Estate

In this paper, according to economics of real estate and macro-control theory, combine with the characteristics of the real estate market, macro-control of the real estate market is studied. After giving the dynamic model of three-dimensional nonlinear differential equations based on the total number of houses on the real estate business, the government’s averages housing investment funds and the standard price, systematically established the stability conditions of equilibrium point for this model. What’s more, through the use of extreme value analysis model, government funds have been invested in real estate business building devotion principles and the construction base of the real estate businessmen has also been estimated successfully. This provides the corresponding theoretical basis for government macro control policy-making.

Design and Realization of Block Level Augmented Reality Three-Dimensional Map

In response to the construction needs of “Real 3D China”, the system structure, functional framework, application direction and product form of block level augmented reality three-dimensional map is designed. Those provide references and ideas for the later large-scale production of augmented reality three-dimensional map. The augmented reality three-dimensional map is produced based on skyline software. Including the map browsing, measurement and analysis and so on, the basic function of three-dimensional map is realized. The special functional module including housing management, pipeline management and so on is developed combining the need of residential quarters development, that expands the application fields of augmented reality three-dimensional map. Those lay the groundwork for the application of augmented reality three-dimensional map. .

Clinical Value of Stereoscopic Three-dimensional Echocardiography in Assessment of Atrial Septal Defects: Feasibility and Efficiency

Stereoscopic three-dimensional echocardiography（S-3DE） is a novel displaying technol-ogy based on real-time 3-dimensional echocardiography （RT-3DE）. Our study was to evaluate the feasibility and efficiency of S-3DE in the diagnosis of atrial septal defect （ASD） and its use in the guidance for transcatheter ASD occlusion. Twelve patients with secundum ASD underwent RT-3DE examination and 9 of the 12 were subjected to transcatheter closure of ASD. Stereoscopic vision was generated with a high-performance volume renderer with red-green stereoscopic glasses. S-3DE was compared with standard RT-3D display for the assessment of the shape, size, and the surrounding tis-sues of ASD and for the guidance of ASD occlusion. The appearance rate of coronary sinus and the mean formation time of the IVC, SVC were compared. Our results showed that S-3DE could measure the diameter of ASD accurately and there was no significant difference in the measurements between S-3DE and standard 3D display （2.89±0.73 cm vs 2.85±0.72 cm, P〉0.05; r=0.96, P〈0.05）. The appearance of coronary sinus for S-3DE was higher as compared with the standard 3D display （93.3% vs 100%）. The mean time of the IVC, SVC for S-3DE monitor was slightly shorter than that of the standard 3D display （11.0±3.8 s vs 10.3±3.6 s, P〉0.05）. The mean completion time of interven-tional procedure was shortened with S-3DE display as compared with standard 3D display （17.3±3.1 min vs 23.0±3.9 min, P〈0.05）. Stereoscopic three-dimensional echocardiography could improve the visualization of three-dimensional echocardiography, facilitate the identification of the adjacent structures, decrease the time required for interventional manipulation. It may be a feasible, safe, and efficient tool for guiding transcatheter septal occlusion or the surgical interventions.

Interpretation of Peitai Real Scene by Tang Yin in the Ming Dynasty

Peitai Real Scene clearly shows us the gorgeous image of Xu-style gardens in the Ming Dynasty,and discloses the achievement of ancient Xu-style gardens,which is of great significance for studying Xu-style gardens.From the perspective of spatial processing,plant landscaping,architectural style,stone and water layout,this paper brought us back to the ancient glory of Peitai through analyzing this painting,which was extremely valuable for the research on Xu-style gardens.

基于Cesium for Unreal的自然资源远程协同调查方法

针对传统自然资源地籍调查依赖大量现场工作和后期数据处理导致的调查周期长、成本高等问题,提出了一种基于Cesium for Unreal的自然资源远程协同调查方法。该方法以倾斜摄影获取的实景三维模型为基础,叠加权属、土地利用等业务数据构建调查场景,并通过优化实景三维模型的渲染效果和性能,使自然资源信息以更加直观、真实的方式呈现。在此基础上,自然资源所在地相关政府部门可直接在系统中查看界址、权属等信息,并与实景进行对比核实,然后在线反馈和记录问题;调查单位根据反馈在系统中直接修改数据,完成后即可与政府部门进行线上确认和签字。肇庆某湿地公园的试点应用结果表明,该方法能显著提高自然资源地籍调查效率,压缩工期,具有较好的应用前景。

基于特征增强和多头注意力融合的表情识别

为了解决近年来基于深度学习的人脸表情识别研究主要依赖实验室受控环境,难以反映现实场景中的自发性和无约束性的问题,同时针对人脸表情变化受多个关键区域影响以及表情数据存在显著类间相似性与类内差异性的挑战,提出了一种基于特征增强和多头注意力融合的人脸表情识别模型.设计改进中心损失函数来增强面部特征的可区分性,增大类间差异,减小类内差异;通过多头注意力学习表情变化的区域相关性;进行注意力融合,提出融合损失函数避免注意力区域重叠,输出表情类别.在基于真实场景的RAFGDB和AffectNet数据集上取得了89.37%和65.31%的准确率,与现有模型相比,有效提高了表情识别精度.

基于线性特征边界线的实景三维动态更新关键技术研究

实景三维中国建设是落实数字中国、平安中国、数字经济战略的重要举措,是新时期国家重要新型基础设施,是服务生态文明建设和经济社会发展的基础支撑。“十四五”以来,各地已经陆续开展了一定规模的实景三维建设项目,积累了不同尺度的实景三维底板数据。如何充分利用已有建设成果,且持续保障实景三维数据的时效性、可用性,已经成为下一个亟需解决的问题。文章针对实景三维数据的场景特征属性,提出一种线性特征边界线的实景三维动态更新和场景融合的方案。基于原有场景数据,将目标更新区域最邻近线性特征边界线作为实际更新范围,对其进行切割、拼接、调色、融合等处理,实现多期实景三维数据的无缝融合。

卧游与朝鲜文人的中国文学图景想象

朝鲜文人基于中国文学图景而发生的卧游行为,架起了文本与想象、图像与真景之间的桥梁,这是中国文学在域外传播中不容忽视的接受现象。借助于“以画卧游”“以文卧游”“以景卧游”,朝鲜文人既实现了替代实地之行的自我消遣,也与中国文学及其艺术精神在精神层面产生了高度契合与创造性超越。由文到画、再到实景空间的再现,充分展现了中国文学在古代朝鲜半岛与其他艺术门类的交织会通,东亚文化共相也由此而生。

无人机倾斜摄影在实景三维模型构建中的应用研究

为了探索无人机倾斜摄影技术在实景三维模型构建中的高效应用,本文通过介绍研究区概况、无人机数据采集的详细流程(包括布置像控点、设计倾斜环绕航线与数据采集)、图像预处理的关键步骤(图像修复与匀光处理),以及实景三维模型的建立过程,深入分析了该技术在实际应用中的技术细节与优势。研究结果表明,无人机倾斜摄影技术能够显著提升三维模型构建的精度与效率,为城市规划、灾害评估、环境监测等领域提供了更为精准、全面的空间信息支持,展现出广阔的应用前景。

基于倾斜摄影测量的建筑实景三维模型构建

为了构建高精度的建筑实景三维模型,本文基于倾斜摄影测量技术,首先介绍了研究区的概况,随后详细阐述了建筑场景空地联合布控的方法,确保数据采集的全面性与准确性。通过倾斜摄影数据采集与影像预处理步骤,有效解决了色彩差异、重叠度等问题,提升了影像质量。进而,采用先进的三维建模技术构建了实景三维模型。最后,对模型进行了严格的误差检验,验证了其精度与可靠性。研究结果表明,该方法能够高效、准确地构建出建筑实景三维模型,为城市规划、建筑设计及灾害评估等领域提供了有力支持。

基于神经辐射场的化工厂设备三维实景重建

在中小型化工企业中,员工设备认识教育方面存在教学设施单一、企业投入成本比例偏低的问题。为解决该问题,本文提出一种基于神经辐射场的化工设备实景三维重建技术,旨在构建可实景复制的设备认识教学培训环境。通过神经辐射场技术,能够精确还原化工设备的真实物理形态,使员工有身临其境之感,充分感知设备细节,进而为中小型化工企业员工培训提供高性价比的解决方案。本文详细阐述了设备实景重建原理及其在中小型化工企业中的应用前景,并通过文献分析和实验研究对其有效性和实用性进行了验证。

倾斜摄影技术在精细化模型制作中的应用研究

针对倾斜摄影技术自动得到的实景三维模型存在水面破损、悬浮物问题,提出采用模型修饰技术对自动化生产的模型进行处理,提升模型成果的质量。文章首先对倾斜摄影测量技术进行介绍,并对实景三维模型的作业流程进行说明,然后重点分析了模型出现问题的原因并给出可行的解决措施,最后对问题模型进行处理,得到了质量较高的模型成果。

基于无人机倾斜摄影的大比例尺地形图测绘研究

针对实景三维模型拉花区域生产的地形图精度易超限的问题,文章提出采用实景三维模型和虚拟立体像对相结合的方式生产地形图。首先介绍了无人机倾斜摄影技术和基于下视影像的立体模型重建技术;其次以某一项目为例,将实景三维模型和虚拟立体像对两种测图方式相结合用于生产任务区内地形图数据的测绘;最后将外业采集的特征检测点导入到软件中,完成地形图精度的检测。通过分析检测点的平面、高程较差和中误差,研究项目测绘的地形图,精度符合1∶500测图比例要求。研究成果可为采用航摄作业方式生产大比例尺地形图人员提供参考。

Unreal Engine引擎支持下的三维规划审批关键技术研究

本文提出了一种基于Unreal Engine引擎在三维规划审批场景构建的关键技术,为人们研究和分析国土空间规划方案提供直观的参考价值和实用意义。首先,基于规划方案设计原始资料,采用3ds Max软件制作规划方案模型,准确地呈现规划方案的建筑效果;然后,将规划方案模型数据进行特定的格式转换,融合Unreal Engine空间渲染引擎技术,加载真实地形影像数据与实景三维数据,构建三维规划方案场景,以提高真实感和沉浸感;最后,以重庆市某规划方案为研究对象,论证基于Unreal Engine引擎在三维规划审批场景构建的关键技术。

Overview of 3D Scene Viewpoints evaluation method

The research on 3D scene viewpoints has been a frontier problem in computer graphics and virtual reality technology.In a pioneering study,it had been extensively used in virtual scene understanding,image-based modeling,and visualization computing.With the development of computer graphics and the human-computer interaction,the viewpoint evaluation becomes more significant for the comprehensive understanding of complex scenes.The high-quality viewpoints could navigate observers to the region of interest,help subjects to seek the hidden relations of hierarchical structure,and improve the efficiency of virtual exploration.These studies later contributed to research such as robot vision,dynamic scene planning,virtual driving and artificial intelligence navigation.The introduction of visual perception had The introduction of visual perception had contributed to the inspiration of viewpoints research,and the combination with machine learning made significant progress in the viewpoints selection.The viewpoints research also has been significant in the optimization of global lighting,visualization calculation,3D supervising rendering,and reconstruction of a virtual scene.Additionally,it has a huge potential in novel fields such as 3D model retrieval,virtual tactile analysis,human visual perception research,salient point calculation,ray tracing optimization,molecular visualization,and intelligent scene computing.

面向水库型小流域的多源水利三维建模方法研究

针对大型河道三维可视化建模中采用激光雷达、声呐等传感器获取水下地形建模方式操作复杂且成本较高的缺陷,在利用基础测绘成果构建实景地形模型的基础上,采用多源三维模型融合方法对月塘水库小流域进行实景建模。首先采用倾斜摄影三维建模技术对重点水利工程进行实景建模,并利用专业建模软件对重要控制单元进行构件级建模;然后利用已有河道断面数据结合河流面状矢量数据,实现流域内胥浦河河道实景三维建模;最后通过人机交互方式对多源实景模型进行微调与相互印证,实现月塘水库小流域多源三维模型精准融合构建。研究成果可为河道型水库的预报调度与洪水风险分析提供可视化模型基础与决策支撑。

实景三维北京研究建设进展(2008—2023年)

本文介绍了实景三维(3D)建设的工作背景,汇总了国家和自然资源部、北京市层面关于数字中国、实景3D中国、实景3D北京建设的政策文件和主要内容,归纳了实景3D建设标准体系、理论研究、数据生产、数据库建设、平台研发与应用等方面技术研究成果,总结了2008—2023年北京实景3D建设历程、主要成果以及新型基础测绘北京试点建设内容、关键技术和应用,对已开展的实景3D北京研究建设工作进行了分析并从产品、数据更新、应用场景等方面提出了建议。