Synthetic aperture radar mosaic image uniform color processing method
A synthetic aperture radar and color processing technology, which is applied in image data processing, image enhancement, image analysis, etc., can solve the problems that affect the effect of color uniform processing, cannot obtain the radiation transformation relationship of SAR images, and cannot reflect the radiation distribution characteristics of SAR images, etc.
Active Publication Date: 2021-11-30
AEROSPACE INFORMATION RES INST CAS
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[0005] (1) The color uniformity processing model suitable for the radiation characteristics of SAR images is not adopted, and only statistics such as image mean, variance, and histogram are used for color uniformity processing, which cannot reflect the radiation distribution characteristics of SAR images;
[0006] (2) The color uniformity processing benchmark between images is not extracted according to the radiation principle of SAR images, and the stable radiation transformation relationship between SAR images cannot be obtained, and it is susceptible to interference from specular reflection, dihedral angle reflection, and speckle noise, which affects the color uniformity processing effect
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[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0026] The terminology used herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the present disclosure. The terms "comprising", "comprising" and the like used herein indicate the presence of stated features, steps, operations and / or components, but do not exclude the presence or addition of one or more other features, steps, operations or components.
[0027] All terms (including technical and scientific terms) used herein have the meaning commonly understood by one of ordinary skill in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted to have a meaning consistent with the context of this specification, and not be i...
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The invention relates to a synthetic aperture radar mosaic image uniform color processing method. The method comprises the following steps: processing an original signal received by a synthetic aperture radar to generate a first image, and processing the first image to obtain an image space homonymy point; correcting the first geometric positioning parameter based on the image space homonymy point to obtain a second geometric positioning parameter; extracting corresponding areas of adjacent images based on the image space homonymy points and the second geometric positioning parameters; screening partial areas in the corresponding areas of the adjacent images to serve as a uniform color model coefficient reference; constructing a backscattering coefficient correction model on the basis of the region serving as the coefficient reference of the uniform color model; obtaining a uniform color processing correction coefficient based on the back scattering coefficient correction model; performing radiation correction on the first image again by using the uniform color processing correction coefficient to obtain a second image; and carrying out visualization processing on the second image.
Description
technical field [0001] The invention relates to the technical field of radar imaging processing, in particular to a method for uniform color processing of synthetic aperture radar mosaic images. Background technique [0002] Satellite remote sensing has the advantages of not being restricted by national borders and high resolution. It has important applications in military reconnaissance, national defense construction, land resources, ecological environment, emergency disaster reduction, marine monitoring and other fields. It is one of the strategic high technologies that countries focus on developing. Synthetic Aperture Radar (SAR), as an all-weather and all-weather earth observation technology, has obvious advantages in disaster areas, cloudy and foggy conditions. In recent years, the number of SAR remote sensing satellites has been increasing, including PalSAR, Cosmo, RadarSat, TerraSAR, Gaofen-3, etc. have acquired more and more SAR remote sensing image data. The covera...
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IPC IPC(8): G06T5/00G06T7/90
CPCG06T7/90G06T2207/10032G06T2207/10044G06T5/92
Inventor 王峰胡玉新刘方坚刘瑞焦念刚
Owner AEROSPACE INFORMATION RES INST CAS