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A visual field analysis method and device

A technology of domain analysis and line-of-sight direction, applied in the field of terrain detection, can solve problems such as big data redundancy

Active Publication Date: 2018-10-12
CHENGDU ZHONGKE HEXUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to get the topographic visibility domain of the whole area, but this method has a lot of data redundancy

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  • A visual field analysis method and device
  • A visual field analysis method and device
  • A visual field analysis method and device

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Embodiment Construction

[0044]In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0045] It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", etc. are only used to distin...

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Abstract

The embodiment of the invention provides an analytical method and an analytical device for a visible range and belongs to the technical field of topography detection. The analytical method comprises the following steps: successively acquiring elevation values of a plurality of orientation nodes according to a digital elevation model grid map within an observing radius and calculating an included angle theta and a linear distance L between each orientation node and the horizontal line of an observing point; performing visibility analysis for the visibility of each orientation node at an observing angle according to the included angle theta, the linear distance L, the analysis accuracy and the topographic information pre-stored in the digital elevation model grid map; displaying a result after the visibility analysis, wherein the topographic information includes the condition of elevation value change of each orientation node along the visible direction of the observing point. According to the analytical method provided by the invention, the data redundancy generated in the calculation process can be effectively reduced and the efficiency and accuracy of the calculation can be promoted.

Description

technical field [0001] The present invention relates to the technical field of terrain detection, in particular, to a method and device for analyzing a visible region. Background technique [0002] Visibility analysis is a common concept used to characterize whether things can be directly observed by human eyes. Terrain visibility analysis based on digital elevation model (Digital Elevation Model, DEM) refers to the range of terrain that can be seen from one or more positions or the degree of visibility with other terrain points. Among them, the visual domain analysis is the collection of topographic points that can be observed by the research observation point within its observation range. The data base of viewshed analysis is the digital elevation model. [0003] Visual domain analysis has a wide range of application prospects, such as the setting of forest fire monitoring points, the setting of observation posts and the setting of wireless transmission towers. Visual d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/05G06F17/50
CPCG06F30/00G06T17/05
Inventor 朱金华李飞
Owner CHENGDU ZHONGKE HEXUN TECH CO LTD