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Geometric fine correction method suitable for high-resolution remote sensing image

A remote sensing image and high-resolution technology, applied in image enhancement, image analysis, image data processing, etc., can solve problems such as error matching, geometric fine correction failure, etc., and achieve the effect of improving operating speed and reducing redundant calculations

Pending Publication Date: 2021-11-02
CHANGGUANG SATELLITE TECH CO LTD
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Problems solved by technology

[0005] In order to solve the problem that the image matching method in the prior art is prone to wrong matching, which leads to the failure of geometric fine correction, etc., the present invention provides a geometric fine correction method suitable for high-resolution remote sensing images

Method used

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  • Geometric fine correction method suitable for high-resolution remote sensing image
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  • Geometric fine correction method suitable for high-resolution remote sensing image

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Embodiment Construction

[0031] combine Figure 1 to Figure 8 Describe this embodiment, a geometric fine correction method suitable for high-resolution remote sensing images, the method is specifically implemented by the following steps:

[0032] (1) Let the image to be processed be I In , according to I In RPC coefficient, calculate I In The maximum and minimum range of the coordinates, and according to the possible maximum positioning error, the I In The coordinate range of the extended range is expanded from the center to the outside, and the lengths of the expanded range in the east-west and north-south directions are respectively W Ref 、H Ref , the maximum value of the abscissa is The minimum value is The maximum value of the vertical axis is The minimum value is Get the underlay for this extent I Ref ;

[0033] (2) Suppose the image to be processed I In The lengths of the east-west and north-south directions are respectively W In 、H In . to meRef Take the sliding window, and th...

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Abstract

The invention discloses a geometric fine correction method suitable for a high-resolution remote sensing image, relates to the field of geometric fine correction of remote sensing images, and solves the problem that in the prior art, an image matching method is easy to have wrong matching, so that geometric fine correction fails and the like. An image retrieval method in the field of computer vision is applied to geometric fine correction of remote sensing images, redundant calculation in the homonymy point matching process is reduced, and the running speed is remarkably increased; fourier-Mellin transform blocks are used for matching homonymy points of the images, parameters and thresholds suitable for high-resolution remote sensing images are provided through a large number of experiments, and a more stable and accurate result is obtained under the condition that ground feature change, radiation and color difference exist between the to-be-processed image and a reference base map. And full-automatic geometric fine correction is carried out by taking the data as a control point. The method provided by the invention is remarkably improved in the aspects of speed, precision and stability.

Description

technical field [0001] The invention relates to the field of precise geometric correction of remote sensing images, in particular to a precise geometric correction method suitable for high-resolution remote sensing images. Background technique [0002] The classical fine geometric correction method of remote sensing images usually uses information such as ground control points, satellite orbit parameters, satellite attitude parameters, and sensor optical parameters to establish a geometric fine correction model, thereby correcting the projection method, sensor attitude error, terrain fluctuation, atmospheric refraction and The geometric deformation of remote sensing images caused by factors such as the earth's rotation eliminates the coordinate error of image pixels in the geographic coordinate system and corrects the pixels to the correct position. The above method usually requires manual selection of ground control points, which is inefficient and heavy workload, and it is...

Claims

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Application Information

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IPC IPC(8): G06T5/00G06T7/33G06T7/37
CPCG06T7/337G06T7/37G06T2207/20056G06T2207/10032G06T2207/20052G06T2207/10024G06T5/80
Inventor 高放李一挥李文涛张鹏姜振平李相坤安源
Owner CHANGGUANG SATELLITE TECH CO LTD
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