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Three-dimensional real scene modeling system based on aviation oblique photograph measurement

A technology for oblique photogrammetry and real scene modeling, applied in the computer field, can solve the problems of inability to obtain top information of high-rise buildings, low efficiency of occluded scanning and measurement operations, etc., and achieve the effect of high accuracy and strong sense of reality.

Inactive Publication Date: 2015-02-18
广西界围信息科技有限公司
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AI Technical Summary

Problems solved by technology

Disadvantages: due to the low efficiency of scanning and measurement work due to occlusion, it is only suitable for small-scale modeling; the top information of high-rise buildings cannot be obtained

Method used

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the embodiments, so that those skilled in the art can implement it with reference to the description.

[0022] A three-dimensional real scene modeling system based on aerial oblique photogrammetry, comprising the following steps:

[0023] Step 1: Estimate the target elevation range, and record the minimum surface height of the target area as h 1 and the maximum height recorded as h 2 ;

[0024] Step 2: Take aerial oblique shots of the target, and record the outer orientation elements and inner orientation elements of all the photos corresponding to the camera;

[0025] Step 3: Take pixel point a in photo A, connect pixel point a with the center point of the camera when photo A was taken, and extend toward the target point to form the first ray, and intercept the first ray at h 1 -h 2 The line segment within the range, that is, the first space line segment; take the photo B, and proje...

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Abstract

The invention discloses a three-dimensional real scene modeling system based on aviation oblique photograph measurement. The using method of the system comprises the steps of estimating the elevation range of a target, conducting aviation oblique photographing on the target, and recording the elements of exterior orientation and elements of interior orientation, corresponding to a camera, of all photos; taking a pixel point a in a photo A, finding a first ray, and cutting out the segment, within the range between h1 and h2, of the first ray, namely a first spatial segment; taking a photo B, projecting the first spatial segment on the photo B, obtaining a first epipolar ray, and finding a homonymy pixel point b; connecting the homonymy pixel point b with the center point of the camera when the camera is used for photographing the photo B, and extending the connecting line towards the target point to form a second ray, wherein the point of intersection of the first ray and the second ray is the three-dimensional space coordinate point of the pixel point a. The scheme effectively achieves three-dimensional real scene modeling and simulation and fills the blank in the field. Three-dimensional digital city and urban residences are obtained quickly, and the problem that a real-time three-dimensional model is hard to obtain currently is solved.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a three-dimensional real scene modeling system based on aerial oblique photogrammetry. Background technique [0002] Aerial oblique photogrammetry: refers to oblique geographic positioning and measurement systems. The basic principle is to install cameras in front, back, left and right, and vertical directions on the aircraft to continuously take pictures of the earth's surface, form a three-dimensional comparison by overlapping the photos, and then calculate the three-dimensional space coordinates through the front intersection of the rays. This method of photogrammetry is referred to as "tilt measurement". It can be applied to 3D digital urban modeling, rural residential modeling, 3D real scene modeling, engineering measurement and 3D model data display and browsing. [0003] Oblique geographic positioning and measurement system: According to oblique photos, GPS, IMU and ot...

Claims

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Application Information

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IPC IPC(8): G06T17/00G06F17/50G01C11/00
Inventor 潘树青陈正伟彭越韦心意韦喆
Owner 广西界围信息科技有限公司
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