Environmental Effects on Light Propagation and Adaptive Systems VI最新文献

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Turbulence mitigation pipelines evaluation 湍流缓解管道评估
Environmental Effects on Light Propagation and Adaptive Systems VI Pub Date : 2023-10-20 DOI: 10.1117/12.2682942
N. Boehrer, Pieter J. Piscaer, Gerhard C. Reeling Brouwer, R. Nieuwenhuizen, Judith Dijk
{"title":"Turbulence mitigation pipelines evaluation","authors":"N. Boehrer, Pieter J. Piscaer, Gerhard C. Reeling Brouwer, R. Nieuwenhuizen, Judith Dijk","doi":"10.1117/12.2682942","DOIUrl":"https://doi.org/10.1117/12.2682942","url":null,"abstract":"Long range horizontal path imaging through atmospheric turbulence is hampered by spatiotemporally randomly varying shifting and blurring of scene points in recorded imagery. Software mitigation strategies have been developed to produce sharp and stable imagery. However, it remains challenging to correct video disturbed by turbulence in real time. Real time implementation of turbulence mitigation will search for compromises between processing performance and corrected image quality. In this paper we compare the quality of real time turbulence mitigation to the results of non-real-time algorithms that should provide a higher image quality. The paper presents the method for the data collection and the results of the comparison on different scenarios relevant in an operational context.","PeriodicalId":265115,"journal":{"name":"Environmental Effects on Light Propagation and Adaptive Systems VI","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129632726","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
A study on the automatic extraction of trajectory for LIDAR data correction 用于激光雷达数据校正的轨迹自动提取方法研究
Environmental Effects on Light Propagation and Adaptive Systems VI Pub Date : 2023-10-20 DOI: 10.1117/12.2679559
Y. Jang, Keunyong Kim, Joo-Hyung Ryu
{"title":"A study on the automatic extraction of trajectory for LIDAR data correction","authors":"Y. Jang, Keunyong Kim, Joo-Hyung Ryu","doi":"10.1117/12.2679559","DOIUrl":"https://doi.org/10.1117/12.2679559","url":null,"abstract":"Generally, LiDAR sensors use near-infrared light, so in highly water contented areas such as marshes, the laser reflection intensity is weakened due to the absorption of a lot of light. In addition, during the IMU calibration process of the sensor, it is not possible to obtain a high-precision point cloud due to the shaking of the aircraft, accumulation of errors, and other factors. To post-process the acquired point cloud, it is necessary to separate the data that contains the vibrations of the aircraft, such as acceleration, rotation, and calibration, from the point cloud by aligning the trajectory of the UAV with the point cloud. However, manually separating the trajectory for a wide area of UAV flight can take a lot of time and can affect the consistency of the data. In this study, aim to extract a stable LiDAR point cloud by separating the trajectory of the UAV based on the following criteria for UAVs with a certain pattern of trajectory. First, separate the two trajectories by distinguishing between acceleration and cruising of the UAV. Second, separate two regions where the direction of the UAV's travel changes sharply. Finally, apply a process to separate the IMU calibration process. Through this process, can automatically extract the LiDAR trajectory data and select only the point cloud obtained at the same flight speed and altitude, thereby obtaining a point cloud density of a constant value. This study reduces the time required for separating and post-processing the trajectory of LiDAR data and enables the production of high-resolution terrain data for a wide area that needs to be flown at low altitudes.","PeriodicalId":265115,"journal":{"name":"Environmental Effects on Light Propagation and Adaptive Systems VI","volume":"176 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134372674","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
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