Image restoration method for image quality degraded imaging system with optical aberration and small hole diffraction

An imaging system and small-aperture technology, applied in the radio wave measurement system, using re-radiation, re-radiation of electromagnetic waves, etc., can solve problems such as not obtaining ideal results, achieve the effect of degraded model accuracy, and improve image resolution

Inactive Publication Date: 2008-02-27
ZHEJIANG UNIV
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Problems solved by technology

The super-resolution image restoration method was first proposed by Harris and Goodman in the 1960s, and successively proposed restoration methods such as linear extrapolation method and superimposed sinusoidal template method, but they did not obtain ideal results in practical applications, and they were called "super-resolution image restoration methods". The Resolution Myth"

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  • Image restoration method for image quality degraded imaging system with optical aberration and small hole diffraction
  • Image restoration method for image quality degraded imaging system with optical aberration and small hole diffraction
  • Image restoration method for image quality degraded imaging system with optical aberration and small hole diffraction

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Embodiment Construction

[0030] As shown in FIG. 1 , the imaging system of the present invention includes a small-aperture imaging lens with aberrations, an image sensor CCD, an image processing unit, and the like. After the scene is imaged by the small-aperture imaging lens with aberration, it is converted into a degraded image by the image sensor CCD and output to the image processing unit. Images with increased rate. The imaging lens is generally a small-aperture long-focus objective lens. Its design aberration is known, and its processing error and assembly error can be obtained by testing with high-precision laboratory instruments (such as MTF tester). The dotted line in Figure 3c is the MTF of the imaging lens under the influence of aberration and small aperture diffraction, that is, the degradation model. After the scene is imaged by the imaging lens, it is sensed by the CCD, and the image processing unit obtains a degraded image of the scene. Figure 3a is a degradation map of a standard scen...

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Abstract

The invention discloses an image reversion method with the image errors and small bore diffraction image quality regressive imaging system. It include the processes: (1) after scene imaging through the imaging lens of small bore with image error, the image is degenerated by CCD and output the degeneration image to image processing unit; (2)the unit recovers the image to the high resolution factor image according to the lens imaging character. The image reversion method of invention uses the optical system information (optical caliber, image error and all kinds of machining error), so the degeneration module is precision and the user can get the good super resolution factor recovery method but not knowing the camera parameter, so the recovery effect is better than the normal method.

Description

technical field [0001] The invention relates to an image restoration method for an imaging system with aberration and small aperture diffraction image quality degradation. Background technique [0002] Under the modern international situation, various small and efficient aircraft are developing rapidly, and high-resolution, high-definition, small and light payloads have important strategic significance. Most developed countries have carried out research on various aircraft. In order to track the development frontier of world aerospace earth observation and remote sensing technology, China has successively carried out research on aircraft and payload related technologies in recent years. For modern aircraft, high-resolution, lightweight optical observation system is an important key technology, so research on lightweight, high-resolution, and miniaturized technologies for aerospace cameras has become the key to the development of modern aerospace earth observation. In addit...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/48G01S7/02G01S17/89G01S13/90
Inventor 冯华君陶小平徐之海李奇
Owner ZHEJIANG UNIV
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