PSF estimation method for single-lens calculation and imaging based on checkerboard image

Abstract

The present invention provides a PSF estimation method for single-lens calculation and imaging based on the checkerboard image. The method comprises: photographing a checkerboard calibration plate under a normal aperture by using a single lens and photographing the checkerboard calibration plate under a minimum aperture by using the single lens; based on the obtained fuzzy and clear checkerboard image pair, converting the problem of single-lens fuzzy kernel calibration to non-blind convolution image restoration; and using an optimization algorithm to solve the objective function of the non-blind convolution image restoration so as to obtain the PSF of the single lens. According to the method provided by the present invention, based on the existing single-lens calculation and imaging algorithm, with the checkerboard calibration plate, the calibration process is simple, the practicability is strong, the precision of the estimated PSF is increased, the lens cost is greatly reduced while ensuring the image quality, the size and the mass of the lens are reduced, and the method is of great significance to the field of image processing and camera design.

Description

technical field [0001] The invention relates to the technical field of image restoration, in particular to a method for estimating the PSF of a single-lens computational imaging based on a checkerboard image. Background technique [0002] At present, SLR cameras are playing an increasingly important role in people's daily life due to their advantages such as high-definition imaging quality, rich lens selection, fast response speed, and excellent manual control ability. However, in order to compensate for the geometric distortion and aberration of the lens in the SLR lens and further improve the imaging quality, the design of the SLR lens is becoming more and more complex, even including dozens of independent optical devices. Complicated lenses will increase the volume and weight of the lens while improving the imaging quality, making it more difficult for users to use flexibly and increasing the cost of the lens. Therefore, how to reduce lens cost and make it lighter while ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems of low PSF estimation accuracy and complex estimation methods in the current single-lens computational imaging problem, the present invention proposes a PSF estimation method for single-lens computational imaging based on a checkerboard image

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