Calculation method of target height in a single spaceborne remote sensing image based on rational polynomial coefficients

Abstract

A method for calculating the target height of a single spaceborne remote sensing image based on rational polynomial coefficients, comprising the following steps: obtaining the bottom coordinates and top coordinates of the target on the remote sensing image; Relationship: express the coordinates of the bottom of the target in the form of rational polynomial coefficients; express the coordinates of the top of the target in the form of rational polynomial coefficients; based on the fact that the latitude and longitude of the bottom of the target are consistent with the latitude and longitude of the top, directly solve the height of the top of the regularized target; use the regularization formula for inverse transformation Obtain the absolute height of the top of the target; make a difference between the height of the top of the target and the height of the bottom to obtain the target height. The invention does not need to use the space triangle relationship between the satellite or the sun and the target, and the calculation accuracy is high; the target body is directly observed without the shadow information of the target, and the calculation process is simple and efficient.

Description

technical field [0001] The invention relates to the technical field of spaceborne remote sensing images, in particular to a method for calculating target height of a single spaceborne remote sensing image based on rational polynomial coefficients. Background technique [0002] With the rapid development of urban processes, there are more and more man-made buildings. Different from the gradual shape of naturally formed objects, man-made objects generally have the characteristics of vertical erection, such as buildings, monuments, towers, power lines and so on. For the height information of upright targets, it is difficult to measure manually on site. Using satellite-borne remote sensing images can achieve accurate, objective and rapid acquisition of the height information of upright targets. [0003] Existing target height calculation methods based on a single satellite remote sensing image generally use target shadow length, solar elevation and azimuth, and satellite eleva...

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Problems solved by technology

[0016] (1) The existing calculation method for the height of a single remote sensing image needs to know the altitude angle of the satellite and the sun when the remote sensing image is formed. In the actual process, it is difficult to obtain these two angles. satellite altitude angle and sun altitude angle;

[0017] (2) Use the trigonometric function relationship to calculate the target altitude. The angle accuracy has a great influence on the accuracy of the altitude calculation result, and the accuracy of the satellite and sun altitude angles at the imaging time given by satellite remote sensing products cannot be guaranteed. Therefore, using the sun altitude angle and satellite altitude angle The method cannot obtain satisfactory height solution results

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