ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences最新文献_第10页

COMPARISON OF IMAGE ENHANCEMENT TECHNIQUES FOR RAPID PROCESSING OF POST FLOOD IMAGES 洪水后图像快速处理的图像增强技术比较

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences Pub Date : 2020-11-17 DOI: 10.5194/isprs-archives-xliv-m-2-2020-45-2020

M. Harichandana, V. Sowmya, V. Sajithvariyar, R. Sivanpillai

{"title":"COMPARISON OF IMAGE ENHANCEMENT TECHNIQUES FOR RAPID PROCESSING OF POST FLOOD IMAGES","authors":"M. Harichandana, V. Sowmya, V. Sajithvariyar, R. Sivanpillai","doi":"10.5194/isprs-archives-xliv-m-2-2020-45-2020","DOIUrl":"https://doi.org/10.5194/isprs-archives-xliv-m-2-2020-45-2020","url":null,"abstract":"Abstract. Satellite images are widely used for assessing the areal extent of flooded areas. However, presence of clouds and shadow limit the utility of these images. Numerous digital algorithms are available for enhancing such images and highlighting areas of interest. These algorithms range from simple to complex, and the time required to process these images also varies considerably. For disaster response, it is important to select an algorithm that can enhance the quality of the images in relatively short time. This study compared the relative performance of five traditional (Histogram Equalization, Local Histogram Equalization, Contrast Limited Adaptive Histogram Equalization, Gamma Correction, and Linear Contrast Stretch) algorithms for enhancing post-flood satellite images. Flood images with different levels of clouds and shadows were enhanced and output generated were evaluated in terms of processing time and quality as measured by Blind/Reference less Image Spatial Quality Evaluator (BRISQUE), a no-reference image quality metric. Findings from this study will provide valuable information to image analysts for selecting a suitable algorithm for rapidly processing post-flood satellite images.","PeriodicalId":14757,"journal":{"name":"ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences","volume":"119 1","pages":"45-50"},"PeriodicalIF":0.0,"publicationDate":"2020-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85306186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

UAS LIDAR MAPPING OF AN ARCTIC TUNDRA WATERSHED: CHALLENGES AND OPPORTUNITIES 北极冻土带流域激光雷达制图:挑战与机遇

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences Pub Date : 2020-11-17 DOI: 10.5194/isprs-archives-xliv-m-2-2020-1-2020

A. Collins, C. Andresen, L. Charsley-Groffman, T. Cochran, J. Dann, E. Lathrop, G. Riemersma, E. Swanson, A. Tapadinhas, C. J. Wilson

引用次数: 1

DEVELOPING GEOSPATIAL SCIENTISTS – USING STUDENTS AS PARTNERS IN DRONE RESEARCH 培养地理空间科学家——利用学生作为无人机研究的合作伙伴

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences Pub Date : 2020-11-17 DOI: 10.5194/isprs-archives-xliv-m-2-2020-69-2020

T. McKee, L. Hashemi-Beni

引用次数: 1

PHOTOGRAMMETRIC MODELING OF SUBTERRANEAN FEATURES THROUGH THREE-DIMENSIONAL SOFTWARE ANALYSIS 通过三维软件分析对地下地物进行摄影测量建模

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences Pub Date : 2020-11-17 DOI: 10.5194/isprs-archives-xliv-m-2-2020-95-2020

J. Sepúlveda, J. Capps, K. Johnson, C. Parada, A. Garcia, K. Sestak

{"title":"PHOTOGRAMMETRIC MODELING OF SUBTERRANEAN FEATURES THROUGH THREE-DIMENSIONAL SOFTWARE ANALYSIS","authors":"J. Sepúlveda, J. Capps, K. Johnson, C. Parada, A. Garcia, K. Sestak","doi":"10.5194/isprs-archives-xliv-m-2-2020-95-2020","DOIUrl":"https://doi.org/10.5194/isprs-archives-xliv-m-2-2020-95-2020","url":null,"abstract":"Abstract. LiDAR is a popular and accurate method for mapping that can be utilized for three-dimensional model analysis. However, the equipment set-up and usage can become tedious, and ultimately impractical when applied to locations that are remote and confined in nature. In this investigation, three-dimensional analysis was conducted within a cave system. With this, limitations of LiDAR technology in these conditions become prominent; mapping non-planar surfaces can cause a potential decrease of the quality of the point cloud data. In all, a LiDAR application would be an inefficient use of methodology to conduct this investigation. This prompted a need to set-up and conduct a photogrammetric based evaluation. With this, smartphone camera technology was used in conjunction with free-to-use software and three-dimensional modeling applications. Through the use of photogrammetric concepts and structure from motion software, a three-dimensional model of the cave can be generated. Long term, this model can also be utilized to document the impact and health of the cave system. For the methodology, the on-sight portion of the investigation relied heavily on smartphone camera technology. The procedure draws parallels to drone paths; specifically, two flight-plans were developed to evaluate different perspectives within a 15 by 15 meter space in the cave. Within each flight path, the use of photo overlapping techniques established a denser and more fluid point cloud model. Once the data was processed, two different three-dimensional models of the cave were created. From those models, the point cloud data was extracted in order to merge the two separate models. Afterwards, the models underwent several format conversions in order to import it into the Unity game engine. The final result is an accurate three-dimensional model of the cave that is viewable and playable in a simple video game platform.","PeriodicalId":14757,"journal":{"name":"ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences","volume":"47 3","pages":"95-98"},"PeriodicalIF":0.0,"publicationDate":"2020-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91512539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

SPATIAL DIFFERENCES IN FRESH VEGETABLE SPENDING: A CASE STUDY IN GUILFORD COUNTY, NORTH CAROLINA 新鲜蔬菜消费的空间差异:以北卡罗来纳州吉尔福德县为例

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences Pub Date : 2020-11-17 DOI: 10.5194/isprs-archives-xliv-m-2-2020-73-2020

H. Miao, L. Hashemi-Beni, T. Mulrooney, L. Kurkalova, C. Liang, M. Jha, G. Monty

引用次数: 0

ASSESSMENT OF THE PRECISION OF A SMART-PHONE POLE PHOTOGRAMMETRY FOR A SECOND-ORDER CLIFF SURFACE DEFORMATION STUDIES 智能手机杆摄影测量在二阶悬崖表面变形研究中的精度评估

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences Pub Date : 2020-11-17 DOI: 10.5194/isprs-archives-xliv-m-2-2020-15-2020

M. Eboigbe, D. Kidner

{"title":"ASSESSMENT OF THE PRECISION OF A SMART-PHONE POLE PHOTOGRAMMETRY FOR A SECOND-ORDER CLIFF SURFACE DEFORMATION STUDIES","authors":"M. Eboigbe, D. Kidner","doi":"10.5194/isprs-archives-xliv-m-2-2020-15-2020","DOIUrl":"https://doi.org/10.5194/isprs-archives-xliv-m-2-2020-15-2020","url":null,"abstract":"Abstract. Coastal cliff is almost a vertical elongated structure with a wave-cut notch and a landslip. Cliffs are geological formations with an almost unpredictable and unstoppable detachment between constitutes formations. Due to health, safety, environmental, and military restrictions, there are more regulations and restrictions on the use of drones. There are also the issues of portability and high cost for the purchase of hybrid drones and Terrestrial Laser Scanners (TLS). These negate the regular monitoring of the coastal cliff. This research develops a rapid, low-cost, and precise digital photogrammetry methodology for the continuous monitoring of the cliff by using the pole as the platform and a mobile phone as a sensor. The most practical vertical camera angle, image overlaps, survey distance to the cliff, and realistic time range for surveys are all determined from the basic surveying principles. Precise geometrically related point clouds generated are with or without the Global Navigation Satellite Systems (GNSS). The standard deviation for “alignment and surface deviation” at every point on each point cloud is ± 0.05 m in the Northing and ± 0.12 m on the Easting’s for the self-calibrated digital camera and without the use of GNSS control points. With the GNSS controls, the maximum deviation in the XYZ coordinates is ± 5 cm. Change analysis performed identifies areas of cut, fill, and the segment of threats in all point clouds. The photogrammetric technique developed is very cheap, simple, and reliable with minimum labor. The results obtained indicate the applicability of this methodology for second-order cliff Deformation study.","PeriodicalId":14757,"journal":{"name":"ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences","volume":"181 1","pages":"15-24"},"PeriodicalIF":0.0,"publicationDate":"2020-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82978193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

ON THE CHALLENGE OF SERVICE RECOMMENDATION TO MOBILE USERS IN SMART CITIES: CONTEXT AND ARCHITECTURE 智慧城市中向移动用户推荐服务的挑战:语境与架构

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences Pub Date : 2020-09-15 DOI: 10.5194/isprs-archives-xliv-4-w2-2020-1-2020

A. Ameur, S. Ichou, S. Hammoudi, A. Benna, A. Meziane

{"title":"ON THE CHALLENGE OF SERVICE RECOMMENDATION TO MOBILE USERS IN SMART CITIES: CONTEXT AND ARCHITECTURE","authors":"A. Ameur, S. Ichou, S. Hammoudi, A. Benna, A. Meziane","doi":"10.5194/isprs-archives-xliv-4-w2-2020-1-2020","DOIUrl":"https://doi.org/10.5194/isprs-archives-xliv-4-w2-2020-1-2020","url":null,"abstract":"Abstract. The industrial and academic interest of the research on mobile service recommendation systems based on a wide range of potential applications has significantly increased, owing to the rapid progress of mobile technologies. These systems aim to recommend the right product, service or information to the right mobile users at anytime and anywhere. In smart cities, recommending such services becomes more interesting but also more challenging due to the wide range of information that can be obtained on the user and his surrounding. This quantity and variety of information create problems in terms of processing as well as the problem of choosing the right information to use to offer services. We consider that to provide personalized mobile services in a smart city and know which information is relevant for the recommendation process, identifying and understanding the context of the mobile user is the key. This paper aims to address the issue of recommending personalized mobile services in smart cities by considering two steps: defining the context of the mobile user and designing an architecture of a system that can collect and process context data. Firstly, we propose an UML-based context model to show the contextual parameters to consider in recommending mobile services in a smart city. The model is based on three main classes from which others are divided: the user, his device and the environment. Secondly, we describe a general architecture based on the proposed context model for the collection and processing of context data.","PeriodicalId":14757,"journal":{"name":"ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences","volume":"22 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75789185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

MOBILE LASER SCANNING IN HIGHLY URBANIZED AREA – A CASE STUDY IN SOFIA 高度城市化地区的移动激光扫描——以索非亚为例

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences Pub Date : 2020-09-15 DOI: 10.5194/isprs-archives-xliv-4-w2-2020-29-2020

C. Mickrenska‑Cherneva, A. Alexandrov

{"title":"MOBILE LASER SCANNING IN HIGHLY URBANIZED AREA – A CASE STUDY IN SOFIA","authors":"C. Mickrenska‑Cherneva, A. Alexandrov","doi":"10.5194/isprs-archives-xliv-4-w2-2020-29-2020","DOIUrl":"https://doi.org/10.5194/isprs-archives-xliv-4-w2-2020-29-2020","url":null,"abstract":"Abstract. The paper examines the possibility to create a three-dimensional model of cadastral objects – cadastral parcels and buildings, exploring different spatial data acquisition technologies. Four cadastral parcel and part of the buildings situated in them are selected for the range of the task. Self-contained objects located in buildings have not been examined. The objects are located on the territory of Lozenets District, Sofia, which is highly urbanized part of the capital. In order to create a three-dimensional model, classical land surveying measurements with a total station and mobile laser scanning were performed. In addition, the acquired data is assessed. It is made by comparing measurements of the building to the measurements of the registered point cloud. The assessment results show that the mobile laser scanning technology is efficient to reproduce high quality and accurate data for existing building structures due to MLS advantages – the large range, high accuracy, fast data acquisition and high level of detail. The paper is a part of Alexander Alexandrov master thesis.","PeriodicalId":14757,"journal":{"name":"ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences","volume":"14 1","pages":"29-36"},"PeriodicalIF":0.0,"publicationDate":"2020-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89061632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

KNOWLEDGE MODELING FOR HERITAGE CONSERVATION PROCESS: FROM SURVEY TO HBIM IMPLEMENTATION 遗产保护过程的知识建模:从调查到hbim实施

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences Pub Date : 2020-09-03 DOI: 10.5194/isprs-archives-xliv-4-w1-2020-19-2020

F. Di Stefano, A. Gorreja, E. Malinverni, C. Mariotti

{"title":"KNOWLEDGE MODELING FOR HERITAGE CONSERVATION PROCESS: FROM SURVEY TO HBIM IMPLEMENTATION","authors":"F. Di Stefano, A. Gorreja, E. Malinverni, C. Mariotti","doi":"10.5194/isprs-archives-xliv-4-w1-2020-19-2020","DOIUrl":"https://doi.org/10.5194/isprs-archives-xliv-4-w1-2020-19-2020","url":null,"abstract":"Abstract. This paper aims to develop a strategy for architectural knowledge modeling in order to actively support the built heritage conservation process by fostering collaboration among stakeholders and interoperability between datasets. The integration of two modeling systems, one ontology-based and one in BIM environment, seems to be the right way to meet this objective: the former is rather exhaustive to represent the semantic contents of conservation activities, especially non-geometrical data, the latter is absolutely suitable to represent the logic of the construction, above all geometrical-constructive aspects typical of any architectural organism. Thus, this study proposes a side-by-side approach to synchronize these different ways of representing reality by managing the complexity of cultural heritage on the one hand and of technology tools, such as information systems, on the other. The proposed methodology was tested on the city walls of San Ginesio (Macerata, Italy) and included different steps considering the in-use technologies (notably geomatics and information technologies) as key enablers to acquire, hierarchically order, model and enrich the knowledge of that heritage site. The result is a knowledge-led strategy moving from survey to HBIM implementation, as a way to enhance representation and management in architectural heritage processes.","PeriodicalId":14757,"journal":{"name":"ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences","volume":"4 1","pages":"19-26"},"PeriodicalIF":0.0,"publicationDate":"2020-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80376171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

ONTOLOGY-BASED RULE COMPLIANCE CHECKING FOR SUBSURFACE OBJECTS 基于本体的地下物体规则遵从性检查

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences Pub Date : 2020-09-03 DOI: 10.5194/isprs-archives-xliv-4-w1-2020-91-2020

C. Métral, V. Daponte, A. Caselli, G. D. Marzo, G. Falquet

引用次数: 3