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Gaofen-3 data conversion method, terminal equipment and storage medium

A conversion method and data technology, applied in the fields of electrical digital data processing, still image data retrieval, digital data information retrieval, etc., can solve problems such as no efficient conversion method

Active Publication Date: 2021-05-18
XIAMEN KINGTOP INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to use the PolSARpro open source software to process the Gaofen-3 data, it is necessary to quickly convert the software format of the Gaofen-3 data, but there is no efficient conversion method in the existing data

Method used

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  • Gaofen-3 data conversion method, terminal equipment and storage medium
  • Gaofen-3 data conversion method, terminal equipment and storage medium
  • Gaofen-3 data conversion method, terminal equipment and storage medium

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The reception and storage of satellite images is completed in the remote sensing satellite ground station, which includes a receiving station, a data processing center and an optical processing center. The received data is converted into digital data through digital-to-analog conversion. Currently, the image data is stored in digital form. Due to the limitation of computer technology, it will be stored in the form of tape or film in the future. With the development of computer technology, the storage format tends to be standardized, and most of them adopt the format of tif or geotif.

[0034] From the internal reading and writing format of the data file, it can be divided into three formats, namely BSQ, BIL, and BIP, among which: BSQ is saved by band, that is, one band is saved and then the second band is saved; BIL is saved by line Save means to save the first line of the first band and then save the first line of the second band, and so on; BIP is to save by pixel, th...

Embodiment 2

[0097] The present invention also provides a Gaofen No. 3 data conversion terminal device, including a memory, a processor, and a computer program stored in the memory and operable on the processor. When the processor executes the computer program, The steps in the above method embodiment of Embodiment 1 of the present invention are implemented.

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Abstract

The invention relates to a Gaofen-3 data conversion method, terminal equipment and a storage medium, and the method comprises the steps of obtaining an image quantization maximum value and a calibration constant of a scene from an image meta-information file for an L1A product of each scene; calculating an intermediate parameter omega; obtaining the number of rows, the number of columns and the values of parameters offset_strip and offset_strip_byte from a header file of the TIFF file; after offset strip bytes are offset from the initial position of the TIFF file, reading the value of the data offset of each row and storing same in an array Strip_Offset; after offsetting offset_strip_byte bytes from the initial position of a TIFF file, reading the data length of each row, and storing the data length in an array Strip_Bytes; traversing and reading the data of each row according to the data offset and the data length of each row; and traversing each pixel in each row, and converting the real part and the imaginary part of each pixel according to the calculated intermediate parameter omega to obtain converted data. According to the invention, the Gaofen-3 polarization data is quickly and accurately converted into the data format of the complex scattering matrix S2, and compared with other algorithms, the efficiency is higher.

Description

technical field [0001] The invention relates to the field of data conversion, in particular to a data conversion method for Gaofen No. 3, a terminal device and a storage medium. Background technique [0002] Gaofen-3 satellite (GF-3 satellite for short) is a high-resolution, full-polarization synthetic aperture radar (SAR) satellite, designed with 12 subdivision imaging modes. GF-3 satellite SAR can realize all-weather and all-weather ocean and land monitoring and monitoring, and the C-band multi-polarization microwave remote sensing data obtained by it can be used for ocean monitoring and monitoring, disaster monitoring and assessment, flood monitoring, soil moisture measurement, Crop growth monitoring, forest resource distribution and coverage monitoring and other fields serve my country's Oceanographic Administration, Disaster Reduction Committee, Ministry of Water Resources, Meteorological Bureau and other departments. Technical Support. In order to use the PolSARpro ope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/16G06F16/178G06F16/51
CPCG06F16/164G06F16/1794G06F16/51
Inventor 陈云乔志勇李萌张鸿玮郭燕滨邱莉莉
Owner XIAMEN KINGTOP INFORMATION TECH
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