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
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[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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