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1. CN108335337 - Method and device for generating orthophoto map

Office
China
Application Number 201710048480.2
Application Date 20.01.2017
Publication Number 108335337
Publication Date 27.07.2018
Grant Number 108335337
Grant Date 17.12.2019
Publication Kind B
IPC
G06T 11/00
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
112D image generation
G06F 16/29
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
16Information retrieval; Database structures therefor; File system structures therefor
20of structured data, e.g. relational data
29Geographical information databases
G01C 21/32
GPHYSICS
01MEASURING; TESTING
CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
21Navigation; Navigational instruments not provided for in groups G01C1/-G01C19/104
26specially adapted for navigation in a road network
28with correlation of data from several navigational instruments
30Map- or contour-matching
32Structuring or formatting of map data
CPC
G01C 21/32
GPHYSICS
01MEASURING; TESTING
CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
21Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
26specially adapted for navigation in a road network
28with correlation of data from several navigational instruments
30Map- or contour-matching
32Structuring or formatting of map data
G06F 16/29
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
16Information retrieval; Database structures therefor; File system structures therefor
20of structured data, e.g. relational data
29Geographical information databases
G06T 11/001
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
112D [Two Dimensional] image generation
001Texturing; Colouring; Generation of texture or colour
G06F 16/00
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
FELECTRIC DIGITAL DATA PROCESSING
16Information retrieval; Database structures therefor; File system structures therefor
G06T 11/00
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
112D [Two Dimensional] image generation
Applicants AUTONAVI SOFTWARE CO., LTD.
高德软件有限公司
Inventors XUE XIAOLIANG
薛晓亮
WANG TAO
王涛
Agents 北京领科知识产权代理事务所(特殊普通合伙) 11690
Title
(EN) Method and device for generating orthophoto map
(ZH) 一种正射影像图的生成方法及装置
Abstract
(EN)
The application discloses a method for generating an orthophoto map. The method includes the steps of according to a preset sampling rule, selecting sampling track points from a track point generatedwhen a collecting vehicle travels on a road; for one sampling track point, according to coordinates of the sampling track point, a driving direction angle of the collecting vehicle and a side length of a drawing area, determining a road area range covered by an orthophoto map to be rendered, the range including at least one grid, and each grid corresponding to one pixel of the orthophoto map to berendered; according to plane coordinates of each grid, obtaining a height value of each grid from point cloud data of the road generated by the collecting vehicle during traveling, and obtaining three-dimensional coordinates of the grid; according to the three-dimensional coordinates of each grid, image data of the road and camera parameters, obtaining the color corresponding to each grid; and rendering the color of the corresponding pixel of each grid in the orthographic map to be rendered as the color corresponding to the corresponding grid. The scheme fully considers height changes of theroad surface to produce a more accurate orthophoto map.

(ZH)
本申请公开了正射影像图的生成方法:按照预设采样规则,从采集车在道路上行驶时生成的轨迹点中选取采样轨迹点;针对一个采样轨迹点,根据该采样轨迹点的坐标、采集车的行驶方向角和制图区域边长,确定待渲染的正射影像图覆盖的道路区域范围,该范围中包括至少一个网格,每个网格对应待渲染的正射影像图的一个像素点;根据每个网格的平面坐标从采集车在行驶时生成的道路的点云数据中得到每个网格的高度值,得到网格的三维坐标;根据每个网格的三维坐标、道路的图片数据及相机参数得到每个网格对应的颜色;将每个网格在待渲染的正射影像图中对应的像素点的颜色渲染为相应网格对应的颜色,该方案充分考虑了路面的高度变化,生成更精确的正射影像图。

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