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A Large Scale Oblique Image Mapping Method Based on Depth Map

A technology of oblique image and mapping method, applied in the field of aerial photogrammetry, can solve problems such as inability to measure building information, and achieve the effect of saving field measurement workload, promoting progress, and expanding application fields

Active Publication Date: 2018-03-13
武汉讯图科技有限公司
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Problems solved by technology

[0006] In Document 5, Wang Qing summarized several oblique image measurement methods that are common at home and abroad. One of the oblique image measurement methods is to use a single oblique image combined with DEM for measurement. This method uses a single image and DEM to perform three-dimensional Coordinate measurement, but because DEM has no non-ground point information, it cannot measure side information such as buildings; and the measurement method based on building characteristics mentioned in the article does not clarify detailed technical ideas

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  • A Large Scale Oblique Image Mapping Method Based on Depth Map
  • A Large Scale Oblique Image Mapping Method Based on Depth Map
  • A Large Scale Oblique Image Mapping Method Based on Depth Map

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[0041] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.

[0042] A large-scale oblique image mapping method based on a depth map provided by the present invention comprises the following steps:

[0043] Step 1: Obtain an oblique image sequence, perform stereo matching on the oblique image to obtain a depth image map;

[0044] Oblique photogrammetry is a new type of aerial photography method that uses oblique aerial cameras to obtain ground object information. It uses five lenses to simultaneously acquire five images of downward, front, rear, left, and right angles that reflect the information of the area where the mea...

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Abstract

The invention discloses a large-plotting-scale tilt image measuring method based on a depth image; the depth image acquired by dense matching of the tilt images is used as a data source, an image point position of a to-be-measured target is measured on single image, a three-dimensional coordinate of the to-be-measured target is calculated through a geometry relationship between the single image and the depth image, multi-view information of the to-be-measured target is searched through an optimal baseline principle and a least square method, and thus the reliability and stability of the finally obtained measurement three-dimensional coordinate are improved. While the large-plotting-scale image measurement precision can be met, the measurement work efficiency of large-plotting-scale field work measurement is improved, and a large amount of field work measurement workload is saved.

Description

technical field [0001] The invention belongs to the technical field of aerial photogrammetry, and in particular relates to a method for measuring oblique images obtained by oblique photogrammetry technology based on a single photo for three-dimensional point coordinates to achieve large-scale mapping of the oblique images. Background technique [0002] Traditional aerial photography technology generally obtains the top measurement information of topography and features, but the acquisition of information such as side textures and three-dimensional geometric structures of terrain features with obvious ups and downs has been limited, making the application of photogrammetry technology to image mapping a great challenge. In recent years, oblique photogrammetry technology has become a new technology with rapid development in the world, overcoming the limitation that traditional aerial photogrammetry technology can only shoot from a vertical angle. By integrating POS, DSM and vect...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C11/06
CPCG01C11/06
Inventor 潘飞任旗胜薛万唱郭丙轩张萌
Owner 武汉讯图科技有限公司
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