Method for monitoring on-rail satellite remote sensor modulation transfer function based on image element

A technology of modulation transfer function and satellite remote sensing, which is applied in the field of aerospace, can solve the problems of MTF monitoring, high cost, and difficulty in finding markers, etc., and achieve the effect of improving image quality, increasing contrast, and improving image quality

Inactive Publication Date: 2008-10-08
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0006] The method based on special instruments cannot monitor the MTF of on-orbit remote sensors, and is only suitable for laboratory measurements
The method of artificially arranging targets and ground markers is only suitable for on-orbit monitoring of high-resolution satellite remote sensor MTF, because for me

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  • Method for monitoring on-rail satellite remote sensor modulation transfer function based on image element
  • Method for monitoring on-rail satellite remote sensor modulation transfer function based on image element
  • Method for monitoring on-rail satellite remote sensor modulation transfer function based on image element

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[0032] Combine figure 1 with figure 2 The monitoring method of the modulation transfer function of the satellite remote sensor in orbit based on image elements of the present invention is based on two methods of experiment and model calculation, and includes the following steps:

[0033] The first step is the acquisition and preliminary analysis of laboratory data. Under laboratory conditions, the MTF is measured with the Ealing Electro Optics optical system comprehensive evaluation instrument, and the image element parameters of the MTF and the target at different defocus positions are obtained, and the data is normalized and preprocessed, and then the correctness of the data is checked. Eliminate erroneous data such as singularities. Among them, according to the image texture characteristics of the typical features, the icon of the typical plot is determined as the target of the experiment. Under laboratory conditions, the method of obtaining different modulation transfer funct...

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Abstract

The invention discloses a monitoring method of on-orbit satellite remote sensor modulation transfer function based on image elements. From the image engineering angle, the method applies experiment and calculation, uses quantization image parameter, in combination with experiment acquiring modulation transfer function, to execute MTF and image elemental analysis; establishes a relational model of MTF and image elements under experimental laboratory condition when the satellite remote sensor runs on-orbit, thereby implementing dynamic monitoring to modulation transfer function MTF of on-orbit satellite remote sensor. The invention implements dynamic monitoring to modulation transfer function MTF of on-orbit satellite remote sensor with middle, low, high resolutions, especially with middle, low resolutions; can acquire the MTF of the on-orbit satellite remote sensor without complicated floor equipment, and applies the obtained remote sensor MTF variation to give out a remote sense image compensation process based on MTF, thereby remarkably improving image quality; meanwhile provides a approach for predicting the period that the remote sensor provides an image.

Description

technical field [0001] The invention belongs to the monitoring technology of the modulation transfer function (MTF) of an on-orbit satellite remote sensor in the aerospace field, in particular to a monitoring method for the modulation transfer function of an on-orbit satellite remote sensor based on image elements. Background technique [0002] The modulation transfer function is a comprehensive indicator of the performance and life of the satellite remote sensor. Currently, there are several methods to obtain the modulation transfer function MTF of the satellite remote sensor imaging system: [0003] (1) Laboratory measurement method based on special instruments. At present, there are many different instruments used to measure the MTF of the imaging system in the laboratory. For example, Song Min et al. proposed in Optical Technology, 32(1), 2006 to use Michlshon interferometer to obtain a sinusoidal function with continuously variable frequency to measure CCD. Modulation...

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Application Information

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IPC IPC(8): G01S13/89G01S17/89G06T5/00
Inventor 夏德深王怀义孙怀江朱近刘兆军陈强尤建洁胡晔朱立新戴奇燕
Owner NANJING UNIV OF SCI & TECH
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