Design Of Image Acquisition And Processing System Based On Computational Photography

The modern optical system generally by increasing the number of lenses or even adds aspherical lenses to reduce the aberration of the optical system,making the imaging quality better.With the increase of the number of lenses,the mechanical structure of optical system is more complex,resulting in the manufacturing process of imaging system is very precise and high cost.In order to reduce the number of optical elements in the front end of the imaging system,the imaging mechanism of the single lens optical system is proposed based on the computational photography technology,combining electronic and computer technology to restore the blurred images that caused by aberration of single lens optical system.This paper studied the basic theory of single lens imaging based on the analysised of five primary aberrations in the optical imaging system.A single lens optical imaging system was designed.Using the optical transfer function measuring instrument to measure the LSF of the system,and through the Fourier transform of the transformation relationship between LSF,MTF and PSF,and calculate the entire field of view of the PSF.Image acquisition and processing system based on computational optics uses FPGA as the core hardware platform for real-time acquisition,and uploads data to the computer through the network interface.Computer simulates and verifies the effect of three regularization parameters ?,? and ? of Hyper-Laplace's prior algorithm on restored image,and the parameters are optimized by the simulation results.In this paper,the blurred images acquired by the single-lens imaging system are restored by the modified Hyper-Laplace prior algorithm base on space variation point spread function.The structural similarity of the restored image was increased by 2%.Experiments prove that the image quality is improved significantly,and the algorithm running time shortened from several minutes to a few seconds.Image acquisition and processing system based on computational optics adopts computational imaging technology effectively reduces the number of optical elements at the front end of the imaging system,it simplifies the optical mechanical structure,and realizes the lightweight and miniaturization of the imaging system.