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System and method for eliminating stray light of satellite images

A technology of satellite image and elimination system, applied in the field of satellite application, to achieve the effect of good effect and elimination of stray light

Active Publication Date: 2014-03-26
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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Problems solved by technology

The influence of stray light that cannot be removed by radiation correction in medium and high-resolution remote sensing images cannot be solved

Method used

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  • System and method for eliminating stray light of satellite images
  • System and method for eliminating stray light of satellite images

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing 1, 2 the present invention is described in further detail.

[0022] A satellite image stray light elimination system, including a data acquisition module, an image registration module and a stray light suppression module; wherein the data acquisition module includes an image grayscale acquisition unit and an image parameter acquisition unit, and the image registration module includes an image coarse registration unit and an image fine registration unit, the stray light suppression module includes a proportional coefficient calculation unit, a difference image calculation unit and an image filtering unit;

[0023] The data acquisition module obtains high-resolution camera and wide-format camera images and image-related parameters in the same area from the image database, and defines one of the images as an image to be processed, and another image as a grayscale reference image; image registration The module takes the image t...

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Abstract

The invention discloses a system and a method for eliminating stray light of satellite images. The system comprises a data acquisition module, an image registration module and a stray light suppression module; the data acquisition module comprises an image grayscale acquisition unit and an image parameter acquisition unit, the image registration module comprises an image rough registration unit and an image fine registration unit, and the stray light suppression module comprises a proportion coefficient computation unit, a difference image computation unit and an image filter unit. The system and the method have the advantages that high-definition camera images and wide camera images which are simultaneously formed in orbits are registered at first, corresponding relation models of grayscale values of the high-definition camera images and grayscale values of the wide camera images are built according to spectral corresponding relations among the images, accordingly, influence of the stray light in the images can be eliminated, the method for eliminating the stray light of the images is simple and practical, real information of the images can be preserved to the great extent, and a good stray light eliminating effect can be realized.

Description

technical field [0001] The invention relates to a satellite image stray light elimination system and method, belonging to the satellite application field. Background technique [0002] Stray light brightens the background of satellite images, reduces the image contrast, modulation transfer function and signal-to-noise ratio, has a serious impact on the imaging quality of the optical system, and brings difficulties to the interpretation and application of satellite images. It is necessary to analyze and eliminate the stray light of satellite images, so as to ensure the imaging quality of satellite optical payloads. [0003] Much of the effort in stray light suppression is achieved through optical system design. The most fundamental way to eliminate stray light is to study the source of stray light and then analyze the geometrical optics policy. The calculation methods of stray light mainly include Monte Carlo method, area method, ray tracing method and so on. Among them, t...

Claims

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Application Information

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IPC IPC(8): G06T5/00G06T7/00G06T7/30
Inventor 王小勇何红艳岳春宇刘爽
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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