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Single satellite image-oriented self-acquired triangular element height calculation method

A satellite image and altitude calculation technology, which is applied in the direction of measuring angle, altitude/horizontal measurement, measuring device, etc., to achieve good results in altitude calculation

Active Publication Date: 2014-05-14
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On this basis, aiming at the problem that the satellite elevation angle is still unobtainable, the satellite elevation angle is equivalently represented by the height of the building and the projected length of the building, further deduced, and finally the triangle element height without the satellite elevation angle is solved

Method used

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  • Single satellite image-oriented self-acquired triangular element height calculation method
  • Single satellite image-oriented self-acquired triangular element height calculation method
  • Single satellite image-oriented self-acquired triangular element height calculation method

Examples

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Effect test

Embodiment 1

[0094] Embodiment 1: Taking the satellite image of the area near the Shanghai World Financial Center Building taken on October 4, 2009 as an example, calculate the height of the World Financial Center Building.

[0095] Measure the angle between the side edge of the building and the true north direction in the image to obtain the satellite azimuth angle α=148.50° when the image is taken.

[0096] The angle between the direction of the side edge shadow of the building in the image and the true north direction is measured to obtain the sun azimuth α'=154.23°.

[0097] The scale information provided by the satellite remote sensing image itself is 0.498m / pixel:

[0098] The length of the side edge of the building in the measurement image is 223 pixels, so the projected length of the building is L pb for:

[0099] L pb =0.498×223=111.054m

[0100] The distance between the image points of the side edge vertex P and its shadow point in the measured image is 576 pixels, so:

[01...

Embodiment 2

[0106] Embodiment 2: Taking the satellite image of the area near the Beijing New Poly Building taken on June 23, 2009 as an example, calculate the height of the New Poly Building.

[0107] The angle between the side edge of the building and the true north direction in the image is measured to obtain the satellite azimuth angle α=263.93° when the image is taken.

[0108] The angle between the direction of the side edge shadow of the building in the image and the true north direction is measured to obtain the sun azimuth α'=142.03°.

[0109] The scale information provided by the satellite remote sensing image itself is 0.222m / pixel:

[0110] The length of the side edge of the building in the measurement image is 196 pixels, so the projected length of the building is L pb for:

[0111] L pb =0.222×196=43.512m

[0112] The distance between the image points of the side edge vertex P and its shadow point in the measured image is 326 pixels, so:

[0113] L ps =0.222×326=72.372m...

Embodiment 3

[0118] Embodiment 3: Take the satellite image of the area near the Beijing Water Cube Swimming Complex taken on October 27, 2010 as an example to calculate the height of the Water Cube Swimming Complex.

[0119] Measure the angle between the side edge of the building and the true north direction in the image to obtain the satellite azimuth angle α=10.11° when the image is taken.

[0120] The angle between the direction of the side edge shadow of the building in the image and the true north direction is measured to obtain the sun azimuth α'=164.58°.

[0121] The scale information provided by the satellite remote sensing image itself is 0.234m / pixel:

[0122] The length of the side edge of the building in the measurement image is 73 pixels, so the projected length of the building is L pb for:

[0123] L pb =0.234×73=17.082m

[0124] The distance between the image points of the side edge vertex P and its shadow point in the measured image is 252 pixels, so:

[0125] L ps =0...

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Abstract

The invention provides a single satellite image-oriented self-acquired triangular element height calculation method. The method comprises the steps of calculating three angle parameters, namely a sun elevation angle, a sun azimuth angle and a satellite azimuth angle, according to direction information in a single satellite image and a relation between the sun azimuth angle and the sun elevation angle, performing equivalent expression on a satellite elevation angle through a building height and a building projection length, and finally calculating a triangular element height which does not contain the satellite elevation angle. The effect of realizing calculation on the height of a building in the single satellite image is good.

Description

technical field [0001] The invention relates to a method for calculating the height of an object by using a single satellite image information. Background technique [0002] In recent years, various high-resolution satellite images have appeared one after another, which provides the possibility for people to use remote sensing images to obtain building heights. Building height acquisition is widely used in urban planning, urban economic activities, and military fields. In the 3D virtual reconstruction of real urban environments using satellite images, building height acquisition provides modeling data for 3D modeling of buildings. The necessary way determines the modeling accuracy of the 3D model and has a direct impact on the authenticity of the entire 3D virtual reconstruction environment. At present, there are two main research directions for obtaining building height information using satellite images: (1) Stereo measurement using stereo image pairs; (2) Starting from a...

Claims

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Application Information

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IPC IPC(8): G01C5/00
CPCG01C1/00G01C5/00
Inventor 齐敏家建奎李珂樊养余齐榕赵子岩
Owner NORTHWESTERN POLYTECHNICAL UNIV
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