Color uniformity processing method of synthetic aperture radar mosaic image
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: 2022-05-24
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 objectives, technical solutions and advantages of the present invention more clearly understood, 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 limit the present disclosure. The terms "comprising", "comprising" and the like as used herein indicate the presence of stated features, steps, operations and / or components, but do not preclude 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 as commonly understood by one of ordinary skill in the art, unless otherwise defined. It should be noted that terms used herein should be construed to have meanings consistent with the context of the present specifica...
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The invention relates to a color leveling processing method of a synthetic aperture radar mosaic image. The method includes: processing the original signal received by the synthetic aperture radar to generate a first image, and processing the first image to obtain a point with the same name on the image side; modifying the first geometric positioning parameter based on the point with the same name on the image side to obtain a second geometric positioning parameters; extracting the corresponding area of adjacent images based on the same name point of the image side and the second geometric positioning parameter; screening part of the area in the corresponding area of the adjacent images as a color leveling model coefficient reference; constructing a backscattering coefficient correction model in the area of the model coefficient reference; obtaining a color leveling correction coefficient based on the backscattering coefficient correction model; re-radiating the first image by using the color leveling correction coefficient to obtain a second an image; performing 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 color leveling processing method for 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 mitigation, marine monitoring and other fields. It is one of the strategic high-tech technologies that countries focus on developing. Synthetic Aperture Radar (SAR), as an all-day and all-weather earth observation technology, has obvious advantages in disaster areas, cloudy and foggy conditions, etc. In recent years, the number of SAR remote sensing satellites has been increasing, including PalSAR, Cosmo, RadarSat, TerraSAR, Gaofen-3, etc., the amount of SAR remote sensing image data obtained is increasi...
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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