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An effective optical image compression method based on spaceborne cloud detection

A technology of optical image and compression method, which is applied in the field of satellite image processing, can solve the problem of high image compression rate, etc., and achieve the effect of reducing data storage size and saving satellite-ground transmission bandwidth

Active Publication Date: 2021-11-26
成都国星宇航科技股份有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0009] The purpose of the embodiments of the present application is to provide an effective optical image compression method based on space-borne cloud detection to solve the problem of high image compression rate in related technologies

Method used

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  • An effective optical image compression method based on spaceborne cloud detection
  • An effective optical image compression method based on spaceborne cloud detection
  • An effective optical image compression method based on spaceborne cloud detection

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Experimental program
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Embodiment 1

[0040] In order to facilitate the understanding of the solution of the present application, a brief introduction to the satellite system provided by the embodiment of the present application will be given below.

[0041] see figure 1 As shown, the satellite includes a satellite body, a communication system (not shown in the figure), a processing system and a data transmission system (not shown in the figure); the ground processing center includes a receiving device, and the satellite is connected to the receiving device in communication. The satellite is equipped with a shooting device, so that remote sensing images can be captured and compressed by the processing system in the satellite, so that the compressed remote sensing images can be downloaded to the receiving equipment of the ground processing center through the digital transmission system and communication system. The ground processing center can obtain the required remote sensing images by decompressing and restoring...

Embodiment 2

[0124] In this embodiment, on the basis of the first embodiment, the case where the non-concerned area is the area where the cloud layer is located is taken as an example to further illustrate the present application.

[0125] see Figure 4 as shown, Figure 4 It is a schematic diagram of the overall process of this embodiment.

[0126] Step 1: Determine radiation correction parameters.

[0127] Collect the remote sensing image data that has been downloaded, and perform radiation correction on these remote sensing image data. The main principles of radiation correction are as follows:

[0128]

[0129] in, is the original gray value output by the i-th detector of the camera, Indicates the gray value corresponding to the i-th probe after correction; is the offset value of the i-th probe; is the normalized gain of the i-th probe. Among them, the radiation correction parameters that need to be uploaded to the processing system of the satellite include with .

...

Embodiment 3

[0161] Based on the same inventive concept, an effective optical image compression device 500 based on spaceborne cloud detection is also provided in the embodiment of the present application. see Figure 5 as shown, Figure 5 shows the use of figure 2 The method shown is an efficient compression device for optical images. It should be understood that for the specific functions of the apparatus 500, reference may be made to the foregoing description, and to avoid repetition, detailed descriptions are appropriately omitted here. The device 500 includes at least one software function module that can be stored in the memory of the satellite or solidified in the operating system of the device 500 in the form of software or firmware. specifically:

[0162] see Figure 5 As shown, the device 500 includes: an acquisition module 501 , an identification module 502 and a compression module 503 . in:

[0163] An acquisition module 501, configured to acquire an image to be compres...

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Abstract

The present application provides a method for effectively compressing optical images based on space-borne cloud detection. The method includes: acquiring an image to be compressed, identifying an area of ​​interest and an area of ​​non-interest from the image to be compressed; The image containing the attention area is compressed, and the image containing the non-interest area is compressed according to a preset second compression strategy; the fidelity of the first compression strategy is higher than that of the second compression strategy. The solution of the present application can reduce the compression requirements for images containing non-interest regions, thereby reducing the overall compression rate of images to be compressed, so that more images can be transmitted per unit time, and image transmission efficiency is improved.

Description

technical field [0001] The present application relates to the technical field of image processing in satellites, in particular, to an effective optical image compression method based on spaceborne cloud detection. Background technique [0002] In recent years, with the vigorous development of remote sensing technology, optical remote sensing payloads have emerged continuously, and performance indicators have been greatly improved. The resulting images have higher spatial, spectral, temporal and radiometric resolutions, and the amount of data obtained from optical images has grown exponentially. However, the transmission rate of current communication technology is only about 500Mbps in the satellite-to-ground transmission process. There is a huge gap and contradiction between the satellite-to-ground image transmission bandwidth and the data volume of remote sensing images, which makes it difficult for a large amount of time-sensitive image information to be transmitted in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T9/00G06T5/00
CPCG06T9/00G06T2207/10032G06T5/80
Inventor 周舒婷罗钦瀚徐康
Owner 成都国星宇航科技股份有限公司
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