Research On Image Restoration Method Of Single Lens Optical System

As human beings enter the information age,people's need for high-definition images is also increasing.Optical system design becomes more and more complex.Complex optical systems and precise processing requirements will inevitably lead to higher processing costs.In addition,the weight and volume of the camera will increase.In some special occasions,such as aerial reconnaissance,the weight and volume of the optical system will be strictly limited.In this paper,an imaging method using a single lens as a camera lens is proposed,which combines optical design knowledge with image complex theory.The image quality of single lens is very poor,so it is necessary to restore the blurred image of single lens by image restoration algorithm to improve the image quality.The fundamental purpose is to reduce the burden of optical correction and the complexity of optical systems.The main work of this paper is as follows:(1)The characteristics of single lens imaging blur are analyzed from the theory of optical aberration.The effects of aberrations of single lens optical system on imaging quality are discussed.The image degradation model of single lens imaging system is studied.(2)In this paper,the point spread function and the blurred image of the single lens imaging system are simulated.A single color channel restoration algorithm is designed for the characteristics of the grayscale blurred image obtained by simulation.The sparse distribution prior of the second derivative matrix of the image is introduced and applied.The algorithm recovers the grayscale image formed by a single lens.(3)Aiming at the problem of large aberrations in the color blurred image formed by single lens,a restoration algorithm for chromatic aberration is proposed by establishing the relationship of image gray matrix in multiple color channels.The degraded image with chromatic aberration is restored by the algorithm proposed in this paper,and compared with the recovery effect of the same type of image restoration algorithm,the aberration correction method of single-lens imagingsystem applied to multi-color imaging system is formed.(4)An optical camera with 120 mm focal length and 30 mm aperture is fabricated.The measurement system of point spread function of single lens imaging system is built.The point spread function is measured and photographed in optical darkroom.The single lens blurred image is restored by using the collected point spread function,and the validity of the proposed algorithm is verified.This paper realizes the single lens system imaging verification,and verifies that the single lens imaging system method can be used to reduce the total optical quality of the imaging system,which has important reference value for the application of light imaging systems.