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Single panchromatic remote sensing haze image sharpening method

A remote sensing image, sharpening technology, applied in image enhancement, image analysis, image data processing and other directions, to achieve the effect of small computational complexity, high signal-to-noise ratio, and clear edge details

Inactive Publication Date: 2020-08-28
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0004] In order to solve the application limitations of existing image enhancement algorithms and dark channel restoration algorithms, the present invention provides a method for clearing a single full-color remote sensing haze image

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  • Single panchromatic remote sensing haze image sharpening method
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specific Embodiment approach 1

[0024] Specific implementation mode 1. Combination Figure 1 to Figure 3 Describe this embodiment, a method for clearing a single full-color remote sensing haze image,

[0025] The monochromatic atmospheric scattering model under fog and haze weather conditions is derived by Narasimhan and Nayar based on McCartney's attenuation model and atmospheric light model, that is, the attenuated reflected light and atmospheric light participating in imaging are used to describe fog and haze weather down the degradation process. The attenuated reflected light weakens the incident light to the imaging system, drowns out the detail information and color information of the image, and reduces the imaging contrast. Atmospheric light participating in imaging enters the imaging field of view, causing the high-frequency components of the image to be suppressed and the low-frequency components to be highlighted, which further leads to the loss of image details and the degradation of contrast and...

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Abstract

The invention discloses a single panchromatic remote sensing haze image sharpening method. The invention discloses a transmittance estimation method for obtaining a panchromatic remote sensing image,relates to the technical field of digital image processing, solves the limitation of application of an existing image enhancement algorithm and a dark channel restoration algorithm, and aims at solving the problem of sharpness of the panchromatic remote sensing haze image by utilizing a certain dark pixel in a local area of the panchromatic image, namely a code value of the dark pixel is close tozero. In order to avoid a halo phenomenon caused by a blocking effect and depth-of-field abrupt change, an edge maintenance characteristic and a smoothness characteristic are comprehensively considered, a mean-small-value filtering method is adopted to obtain accurate estimation of transmittance, and finally a sharp remote sensing image with clear edge details and a high signal-to-noise ratio is obtained. The algorithm provided by the invention is small in calculation amount, stable and reliable, and can be applied to a real-time engineering system.

Description

technical field [0001] The invention relates to the technical field of digital image processing, in particular to a method for clearing a single full-color remote sensing haze image. Background technique [0002] The spatial high-resolution remote sensing images acquired by the optical remote sensing platform, especially the panchromatic band images, have the characteristics of rich content, good contrast, and high definition. The analysis and interpretation of spatial high-resolution remote sensing images, especially the processing of panchromatic band images, has high application value in military affairs. However, in recent years, due to environmental pollution and climate change, fog and haze weather widely exists. The absorption and scattering of light by a large number of aerosol particles and tiny water droplets in the air lead to serious degradation of remote sensing imaging quality and decrease in contrast, which greatly limits the The effectiveness of the remote s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00
CPCG06T2207/10032G06T5/73
Inventor 毕国玲张星祥王夺蔡志鹏宋向宇欧阳锐
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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