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SAR wake image quality evaluation and adaptive detection parameter adjustment method

A technology for image quality assessment and parameter adjustment, applied in image data processing, image enhancement, image analysis, etc., can solve the problems of complex evaluation process and long time required for semi-quantitative image analysis, and achieve the effect of strong application value

Active Publication Date: 2021-01-12
AEROSPACE INFORMATION RES INST CAS
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Problems solved by technology

[0004] When SAR is working on sea exploration, the image data acquired is huge. It takes a long time to analyze the images qualitatively and semi-quantitatively by human eyes, and the evaluation process is relatively complicated and needs to be completed by professional analysts.

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  • SAR wake image quality evaluation and adaptive detection parameter adjustment method
  • SAR wake image quality evaluation and adaptive detection parameter adjustment method
  • SAR wake image quality evaluation and adaptive detection parameter adjustment method

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Embodiment Construction

[0055]The invention discloses a SAR wake image quality assessment and adaptive detection parameter adjustment method, comprising the following steps: (1) calculating the grayscale, texture, and structural feature quantities of the image to be evaluated, including contrast, entropy, gradient, edge energy, Gray-level co-occurrence matrix and wavelet decomposition of multi-scale image energy feature quantities; (2) Determine weights according to task requirements; (3) Add feature quantities and weights to obtain SAR wake image evaluation values; (4) According to image evaluation The value adjusts the SAR working parameters. Usually, the image quality assessment needs to compare the image to be evaluated with the reference image to obtain the evaluation value. The SAR wake image quality evaluation method proposed in the present invention does not need a reference image, and the evaluation value calculated by the quality evaluation model of the present invention reflects the SAR wak...

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Abstract

The invention discloses an SAR wake image quality evaluation and adaptive detection parameter adjustment method. The method comprises the following steps: acquiring a plurality of SAR wake images to be evaluated; calculating the characteristic quantities of the plurality of SAR wake images to be evaluated; determining the weight of each characteristic quantity according to a task requirement; performing quality evaluation on the plurality of SAR wake images to obtain an SAR wake image with optimal quality; and taking the detection parameters of the SAR wake image with the optimal quality as aguide to adjust the working parameters of the SAR system, thereby completing SAR wake image quality evaluation and adaptive detection parameter adjustment. The SAR wake image quality evaluation methodprovided by the invention does not need a reference image, and the evaluation value obtained through the method reflects the definition, structural features and texture features of the SAR wake image. In actual use, the SAR image quality is calculated on board in real time, a basis can be provided for SAR optimal sea detection working parameter adjustment, and the method has high application value for SAR sea detection.

Description

technical field [0001] The invention relates to the technical fields of airborne synthetic aperture radar and image analysis, in particular to a method for evaluating the image quality of sea surface wake SAR without a reference image, and a method for adaptively adjusting detection parameters according to the image quality. Background technique [0002] Synthetic Aperture Radar (SAR) has all-weather and all-weather active microwave imaging capabilities. Using SAR images to detect sea surface wakes plays an important role in marine surveillance, ship search and rescue, marine engineering and other military and civilian fields. In recent years, the performance of synthetic aperture radar has been continuously improved. When detecting the sea, it can obtain sea surface wake images under different working parameters such as band, resolution, viewing angle, and polarization. Due to the complex interaction between sea surface wake and sea clutter, ships The size of the target, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00
CPCG06T7/0002G06T2207/10044G06T2207/20064G06T2207/30168
Inventor 李雯雯行坤刘霖喻忠军邓云凯
Owner AEROSPACE INFORMATION RES INST CAS
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