Implementation method of radiometric correction and geometric correction of remote sensing panchromatic image slices based on sopc

Abstract

The present invention provides a SoPC-based method for realizing slice radiation correction and geometric correction of remote sensing panchromatic images. The specific steps are as follows: Step 1. After the original remote sensing CCD image data is extracted by slicing, the slice image data is transmitted to the logic part through the FMC interface. Cache FIFO; auxiliary data is transmitted from the serial port to ARM and then cached to DDR; the radiation correction coefficient is stored in the SD card in the form of a file; step 2, the data cached in the FIFO is output, and the radiation correction coefficient is used to complete the radiation correction. After radiation correction The results are stored in BRAM, and finally stored in the off-chip memory DDR; Step 3: The dual-core ARM performs positioning and calculation on the four vertices of the extraction area of ​​the radiation-corrected slice image, and then completes uncontrolled geometric correction through projection and resampling ; Step 4. Return the calibration result. This method can realize CCD raw data radiation correction and geometric correction on SoPC, and has good real-time performance and stability.

Description

technical field [0001] The invention belongs to the technical field of optical remote sensing image preprocessing, and in particular relates to a SoPC-based method for implementing radiation correction and geometric correction of remote sensing panchromatic image slices. Background technique [0002] The main purpose of remote sensing data preprocessing is to correct the geometric and radiation distortion in the original image, that is, by correcting the deformation, distortion, radiation noise, etc. generated during the image acquisition process, so as to obtain a real scene that reflects the geometry and radiation as much as possible. Informational images. [0003] In the article "Research on Intelligent Preprocessing and Transmission Control Technology of Spaceborne Massive Remote Sensing Data on Orbit", Zhang Chunhong et al. proposed to use the architecture of DSP+FPGA to realize radiation correction and geometric correction, but its design complexity is high and develop...

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Problems solved by technology

[0003] In the article "Research on Intelligent Preprocessing and Transmission Control Technology of Spaceborne Massive Remote Sensing Data on Orbit", Zhang Chunhong et al. proposed to use the architecture of DSP+FPGA to realize radiation correction and geometric correction, but its design complexity is high and development is difficult.

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