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相关概念视频

Levels of Use of a GIS01:29

Levels of Use of a GIS

72
Geographic Information Systems (GIS) operate across three levels of application, each representing an increasing degree of complexity: data management, analysis, and prediction. These levels reflect the expanding functionality and versatility of GIS technology in handling spatial data for diverse purposes.Data ManagementAt its foundational level, GIS serves as a tool for data management, enabling the input, storage, retrieval, and organization of spatial data. This level is often employed in...
72
Selected Data About Geographic Locations01:25

Selected Data About Geographic Locations

49
Geographic Information Systems (GIS) rely on two core types of data: spatial data and attribute data.Spatial DataSpatial data defines the physical location of features within a coordinate system, typically expressed in terms of latitude and longitude. It provides precise positioning for elements like roads, rivers, or buildings.Attribute DataAttribute data complements spatial data by adding descriptive information about these features. For example, a road's spatial data includes its start and...
49
Design Example: Analyzing Capacity Contours for Flood Risk Assessment01:17

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

72
Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
72
Applications of GIS: Disaster Management and Emergency Response01:29

Applications of GIS: Disaster Management and Emergency Response

113
Geographic Information System (GIS) technology is essential for risk identification, action prioritization, and resource optimization in critical situations like flooding and earthquakes. By integrating spatial and demographic data, GIS provides a comprehensive framework for emergency response.GIS integrates data layers, like rainfall intensity, topography, elevation profiles, and river levels, to model high-risk flood zones. These layers assess areas susceptible to flooding based on their...
113
Manipulation and Analysis01:21

Manipulation and Analysis

44
GIS manipulation and analysis functions are vital for decision-making and planning. These activities range from data retrieval tasks, such as selecting information based on specific criteria, to advanced analytical techniques that address complex spatial problems.One critical GIS analysis method is overlaying, which combines multiple data layers to examine impacts. For example, overlaying a river-dammed lake boundary with road networks can identify affected infrastructure. Another common...
44
Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device

82
Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...
82

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相关实验视频

Updated: Jul 23, 2025

Combining Eye-tracking Data with an Analysis of Video Content from Free-viewing a Video of a Walk in an Urban Park Environment
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Combining Eye-tracking Data with an Analysis of Video Content from Free-viewing a Video of a Walk in an Urban Park Environment

Published on: May 7, 2019

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城市环境实例细分模型与数据融合

Kaiyue Du1, Jin Meng1, Xin Meng1

  • 1School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun 130022, China.

Sensors (Basel, Switzerland)
|July 14, 2023
PubMed
概括
此摘要是机器生成的。

本研究提出了一个轻量级,高效和准确的3D城市环境实例分割模型,用于自动驾驶汽车. 它通过使用先进的算法将LiDAR和摄像头数据融合起来,达到99.3%的分类准确度.

关键词:
马尔科夫随机场是一个随机场.支持矢量机器 支持矢量机器数据融合数据融合环境 感知 环境 感知实例细分 实例细分 实例细分平均值转移的转移意味着

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Trajectory Data Analyses for Pedestrian Space-time Activity Study
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Trajectory Data Analyses for Pedestrian Space-time Activity Study

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From Voxels to Knowledge: A Practical Guide to the Segmentation of Complex Electron Microscopy 3D-Data
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From Voxels to Knowledge: A Practical Guide to the Segmentation of Complex Electron Microscopy 3D-Data

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相关实验视频

Last Updated: Jul 23, 2025

Combining Eye-tracking Data with an Analysis of Video Content from Free-viewing a Video of a Walk in an Urban Park Environment
08:25

Combining Eye-tracking Data with an Analysis of Video Content from Free-viewing a Video of a Walk in an Urban Park Environment

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Trajectory Data Analyses for Pedestrian Space-time Activity Study
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科学领域:

  • 计算机视觉 计算机视觉
  • 机器人技术 机器人技术 机器人技术
  • 人工智能的人工智能

背景情况:

  • 城市环境的细粒度实例细分对于自动驾驶汽车的感知至关重要.
  • 现有的方法往往难以区分类似的对象,并且需要大量的计算资源.

研究的目的:

  • 使用合并的LiDAR和摄像头数据开发一个强大的和高效的3D城市环境实例细分模型.
  • 在复杂的城市场景中提高对象分类和细分的可靠性和准确性.

主要方法:

  • 一种双重融合方法,结合LiDAR点云和摄像头图像的数据级和功能级融合.
  • 整合马尔科夫随机场 (MRF) 以优化基于空间上下文的支持向量机 (SVM) 分类.
  • 使用Mean Shift算法进行对象分类和实例细分.

主要成果:

  • 环境对象的分类准确率达到了99.3%.
  • 成功分割相同类型的单个对象,而不需要实例标签.
  • 通过空间上下文链接,通过空间上下文链接,通过空间上下文链接,通过空间上下文链接,通过空间上下文链接,通过空间上下文链接,通过空间上下文链接,通过空间上下文链接,通过空间上下文链接,通过空间上下文链接,通过空间上下文链接,通过空间上下文链接,通过空间上下文链接,通过空间上下文链接,通过空间上下文链接,通过空间上下文链接.

结论:

  • 拟议的双融合模型为3D城市环境实例细分提供了一个轻量级,高效和准确的解决方案.
  • 该方法通过提高对象分类和细分可靠性来增强自动驾驶汽车的感知.
  • 该模型的效率使其适用于自动驾驶系统的实时应用.