Research On Depth Estimation Method Of Light Field And Spectral Light Field Of Occlusion Scene

As a new imaging method,the light field imaging can obtain the four-dimensional light field data of three-dimensional space by single shooting,and obtain the depth information of the target scene by using the multi-angle characteristics of the light field.The existing depth estimation methods can not solve the complex occlusion problem in the scene well,so the paper proposes a depth estimation method to deal with occlusion scene.Since the spectral information and depth information are significant to describe the scene spectrum characteristics and the three-dimensional characteristics,and the spectral imaging technique can only obtain two-dimensional space of the scene information,so,a new spectral light field imaging system is designed and implemented by combining spectral imaging theory with light field imaging theory in this paper to obtain spectral light field data containing spectral information and depth information.And the depth information of spectral image is obtained by using the depth estimation method of light field image based on occlusion scene.The main research work of this paper is as follows:(1)The paper design and implemente a occlusion scene depth estimation algorithm.Firstly,the constraint adaptive defocusing algorithm and the constraint angular entropy algorithm are used to obtain the consistency clues and the defocusing clues of the scene,respectively,so as to obtain the initial depth and confidence of the scene.Then canny operator is used to detect the edge of the image in the center view to obtain the edge information of the scene.Finally,the confidence degree is taken as the prior information of the scene,and the MAP-MRF model is used to fuse the initial depth information and edge information of the scene to obtain the final globally consistent depth estimation result.The experimental results show that this method can better solve the occlusion problem in the scene,and the image edge information retention effect is good(2)A theoretical model of the relationship between the grayscale of spectral image and the incident band is established.It is theoretically shown that the band range of incoming light wave determines the gray scale range of spectral image.Since the band range of narrow band spectral image is small,the gray scale range of image is small,so the texture information of narrow band spectral image is missing.Therefore,in certain complex specific scenes,the accuracy of depth information obtained from narrow band spectral light field image will be reduced.In this paper,the method of true color synthesis is proposed to enrich the texture information of the light field image of spectral images and to solve the possible problems of extracting the depth information of narrow band spectral image.(3)In this paper,the depth estimation method based on the occlusion scene of light field image is used to estimate the depth of narrow band spectral light field image and true color composite spectral light field image.The obtained depth map has higher precision,better extraction effect of occlusion area and image edge depth,and solves certain noise problem.The experimental results show that the method has realized the expansion from spectral imaging to three-dimensional space,which will make the spectral imaging technology have a broader development prospect.