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Method for removing thin cloud of remote sensing image

A remote sensing image and image technology, applied in image enhancement, image data processing, instruments, etc., can solve the problems of poor cloud removal processing effect, complicated operation process, slow processing speed, etc. handy effect

Inactive Publication Date: 2012-06-20
AERIAL PHOTOGRAMMETRY & REMOTE SENSING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a thin cloud removal method for remote sensing images in view of the deficiencies in the above-mentioned prior art. Solve the problems existing in the existing remote sensing image cloud removal methods, such as difficult implementation, complicated operation process, slow processing speed, and poor cloud removal processing effect

Method used

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  • Method for removing thin cloud of remote sensing image
  • Method for removing thin cloud of remote sensing image
  • Method for removing thin cloud of remote sensing image

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Embodiment 1

[0072] Such as figure 1A method for removing thin clouds in a remote sensing image is shown, which uses an image processing device to perform cloud removal processing on a remote sensing image to be processed. The remote sensing image to be processed is a digital remote sensing image and it is a multispectral image. The method includes the following steps:

[0073] Step 1. De-cloud processing of the blue band image. The process of de-cloud processing is as follows:

[0074] 101. Noise image extraction, the extraction process is as follows:

[0075] 101. Separation of blue light band spectral information: the image processing device calls the spectral information detection and separation module to analyze and process the image data of the remote sensing image to be processed, and separate the blue light band image from the remote sensing image to be processed; the blue light band image There is a cloud-covered area that can be judged by the naked eye, and the cloud-covered are...

Embodiment 2

[0113] In this embodiment, the difference from Embodiment 1 is that: when the remote sensing image to be processed is a panchromatic image, the panchromatic image is a blue-light monochrome image with a cloud-covered area on it, and the thin cloud removal method includes The following steps:

[0114] Step 1, noise image extraction: the image processing device invokes a low-pass filter processing module and performs low-pass filter processing on the blue-light monochrome image according to a conventional low-pass filter method, so as to retain the blue-light monochrome image overlying The occlusion background information of the cloud area, and correspondingly obtain the occlusion background image of the blue-light monochrome image; the occlusion background image of the blue-light monochrome image is a noise image to be extracted;

[0115] Step II, image cloud removal processing: the image processing device invokes cloud removal processing module 2, and according to the formula ...

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Abstract

The invention discloses a method for removing thin cloud of a remote sensing image. According to the method, image processing equipment is adopted for performing cloud removing processing on the remote sensing image to be processed; and the remote sensing image to be processed is a digital remote sensing image which is a multispectral image or full-color image. The method for removing the thin cloud comprises the following steps of: 1, extracting a noise image through low-pass filtering processing; 2, removing a low-pass filtering edge effect; 3, performing cloud removing processing on images of each wave band to be subjected to cloud removing processing by using the extracted noise image; and 4, displaying a cloud removing processing result, properly adjusting the size of a filtering core, correspondingly comparing the cloud removing processing result, and finding out a target image with an optimal cloud removing effect. The method has the advantages of reasonable design, simple steps, wide application range, convenience in realization and good cloud removing processing effect and can be used for effectively solving various practical problems of difficult realization, complicated operating process, low processing speed, poorer cloud removing processing effect and the like of a traditional cloud removing method of the remote sensing image.

Description

technical field [0001] The invention belongs to the technical field of remote sensing image restoration and processing, and in particular relates to a method for removing thin clouds from remote sensing images. Background technique [0002] Remote sensing technology has been widely and frequently used in many fields such as land and resource investigation, environmental monitoring, geological disaster emergency command, agriculture and forestry production estimation, oceanography, meteorology, etc. The demand for various remote sensing images is expanding day by day, and the requirements for image quality are getting higher and higher. Due to the impact of climate, especially for the Sichuan Basin and humid climate areas, some remote sensing images have thin clouds or mist, and there is often no room for selection. The "thin cloud layer" here refers to the white lumps and flocculent spots superimposed on the remote sensing image, which partially cover the ground surface, but...

Claims

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Application Information

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IPC IPC(8): G06T5/00
Inventor 万余庆
Owner AERIAL PHOTOGRAMMETRY & REMOTE SENSING CO LTD
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