Satellite image relative radiation correction method and device

A relative radiation correction and satellite image technology, applied in the field of satellite image processing, can solve the problems of satellite image stripe or band radiation difference, uneven optical spatial response of camera, different detector response, etc., to eliminate chromatic aberration and effective relative radiation. Correction effect

Active Publication Date: 2021-03-19
DAODATIANJI SOFTWARE TECH BEIJING
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Problems solved by technology

The linear array pushbroom sensor is susceptible to the influence of factors such as uneven optical spatial response of the camera and different responses of each detector during the imaging process, resulting in the acquired satellite images often having obvious stripes or banded radiation differences.
This kind of band includes bands between detectors, between scan lines and multiple scan lines. This phenomenon will also cause color difference between different CCD sheets

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  • Satellite image relative radiation correction method and device
  • Satellite image relative radiation correction method and device
  • Satellite image relative radiation correction method and device

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Embodiment Construction

[0063] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments It is a part of the embodiments of the present disclosure, but not all of them. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present disclosure.

[0064] In addition, the term "and / or" in this article is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and / or B, which may mean: A exists alone, A and B exist at the same time, There are three cases of B alone. In addition, the character " / " in this art...

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Abstract

The invention provides a satellite image relative radiation correction method and device. The method comprises the steps: obtaining a to-be-corrected satellite image which comprises a plurality of image regions, and enabling one pixel in each image region to correspond to one satellite probe element; establishing a histogram lookup table, determining a relative radiation calibration coefficient, and performing relative radiation correction on the satellite image according to the relative radiation calibration coefficient; performing line loss processing on the satellite image after relative radiation correction; carrying out local stripe processing on the satellite image after line loss processing, and supplementing the lost image; de-overlapping and de-chromatic aberration are carried outon the satellite image after local strip processing, so that the overall radiation of the satellite image is consistent. In this way, effective relative radiation correction can be carried out on satellite images, and the stripe or strip radiation difference phenomenon of the satellite images and the chromatic aberration between the satellite images are eliminated.

Description

technical field [0001] Embodiments of the present disclosure generally relate to the technical field of satellite image processing, and more specifically, relate to a method and device for relative radiation correction of satellite images. Background technique [0002] Gaofen-6 satellite is an important part of the national high-resolution earth observation system major project. It is a low-orbit optical remote sensing satellite and my country's first high-resolution satellite for precise agricultural observation. It has high resolution and wide coverage combine features. Its image data is mainly used in dynamic monitoring of agricultural production, environmental governance, forest resources supervision, disaster risk investigation, taking into account the application requirements of environmental protection, national security and housing construction. [0003] The payload of GF-6 satellite includes three subsystems: high-resolution camera subsystem, wide-format camera subs...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T5/40
CPCG06T5/006G06T5/40G06T2207/10032
Inventor 严华王慧静杨晓冬杨斌张丽莎
Owner DAODATIANJI SOFTWARE TECH BEIJING
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