Cirrus cloud infrared image simulation method based on power spectrum

Abstract

The invention belongs to the field of environment simulation, and specifically relates to a cirrus cloud infrared image simulation method based on a power spectrum, for the purpose of enabling a generated cirrus cloud to be more real and be provided with a direction characteristic. The method comprises the following steps: selecting an initial power spectrum function, and describing the directivity of the power spectrum by use of a directivity factor; constructing a power spectrum model according with a cirrus cloud characteristic; constructing the frequency spectrum function of a cirrus cloud infrared simulation image; establishing the image gray scale matrix of a space domain, and preliminarily forming the cirrus cloud infrared simulation image; and performing histogram planning on the image, and correcting the cirrus cloud infrared simulation image to enable the output cirrus cloud infrared simulation image to be more realistic. Values of parameters in a power spectrum model are given so that cirrus cloud infrared simulation images in different forms are constructed. By using the method provided by the invention, a generated image is provided with a direction distribution characteristic and has similar frequency domain and spatial domain characteristics as a real cirrus cloud image.

Description

Technical field [0001] The invention belongs to the field of environment simulation, and specifically relates to a cirrus infrared image simulation method based on a power spectrum. Background technique [0002] Among various natural backgrounds, clouds are one of the frequently occurring backgrounds. There are many types of clouds, such as cirrus clouds, cumulus clouds, stratus clouds, etc., each of which exhibits different image characteristics. This patent proposes a method for establishing an infrared simulation image for cirrus clouds, and provides image signal input for the detector to recognize the background of cirrus clouds. [0003] Image simulation work has been carried out at home and abroad for many years, and there are various methods and application fields. It is not possible to list them here. It is worth noting that in recent years, with the development of digital image technology and practical application requirements, such a phenomenon has appeared. This kind o...

AI Technical Summary

Problems solved by technology

[0004] In the existing method, the power spectrum function is used to construct the cloud background image. The function model does not include the parameter factors related to the direction, so the obtained cloud background infrared image is isotropic, which does not conform to the directional characteristics of the actual cirrus cloud image.

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