Research On Deep Depth Of Field Of Integral Imaging Visualization

Integral imaging technology is one of the most promising free stereoscopic display technology,which can form a full parallax,full color real three-dimensional image.However,when the depth of field of the target scene is large,the conventional integral imaging has the limitations of low resolution,narrow viewing angle and the depth range due to the small pitch of micro lenses.The physical limitations will result in a reduced visualization of the 3D display.This paper systematically summarizes the research status of integral imaging technology at home and abroad,and then focuses on the integrated imaging visualization enhancement technology in large depth of field.The main work is as follows:In order to enhance the computer reconstruction image quality for the large depth of field scene,this paper presents a synthetic aperture integral imaging technology based on multi-focus element image fusion method.Synthetic aperture integral imaging technology can capture high resolution elemental images from a 3D scene by translating a camera on a 2D grid.However,the imaging lens still suffers from the problem of limited depth of field.This may lead to loss of sharpness and fine details produced in out-of-focus parts of an image.In order to solve the above problems,we present an elemental generalization method combined with the image fusion technology to extend the limited depth of field of the synthetic aperture integral imaging system.The elemental image generalization method uses the depth information extracted from the multi-focus elemental images to register the target object in the elemental image.The aim of this generalization process is to geometrically align the objects in all elemental images so that the correct regions of multi-focus elemental images can be exacted,meanwhile,misjudgments of both edges and smooth regions can be avoided.Then,the generalized elementals can be fused using the block-based fusion method to obtain all-in focus elemental images.Finally,the obtained all-in focus elemental images can be used to produce the 3D images with extended depth of field.From the analysis and experimental results,we can verify the feasibility of the proposed method.In order to realize the optical visualization of integrated imaging in the scene with large depth of field,this paper presents an integral imaging display technology based on Kinect depth image inpainting method.Firstly,the Kinect camera is calibrated to make the acquired depth image and the color image be basically aligned.Then,the depthless regions in the captured depth image are inpainted by using guided fast marching method and joint bilateralfiltering algorithm.By applying these changes,we are able to obtain a better depth map,with lesser holes and more smooth edges,due to the inpainting and calibration process.Finally,accurate element image array can be generated by using the perfect light field information and the high-quality 3D images can be displayed by integral imaging.