Computer Science ›› 2017, Vol. 44 ›› Issue (1): 32-36.doi: 10.11896/j.issn.1002-137X.2017.01.006

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Depth Estimation from Single Defocused Image Based on Gaussian-Cauchy Mixed Model

XUE Song and WANG Wen-jian   

  • Online:2018-11-13 Published:2018-11-13

Abstract: Recovering the 3D depth of a scene from a single image is a difficult problem in the field of computer vision.Most methods for depth estimation from a single defocused image construct the point spread function by an 2D Gaussian or Cauchy distribution.However,reasons of blurred images in the real world are varied,so a simple Gaussian or Cauchy distribution function may be not the best approximation model.They are often influenced by noise and inaccurate edge location,and then a high quality depth estimation may be difficult to achieve.A Gaussian-Cauchy mixed distribution model was presented in this paper to re-blur the given defocused image,and two different degree blurred images were then obtained.We estimated the sparse depth map generated from the gradients ratio at edge locations by the two blurred images.In so doing,a full depth map can be recovered by matting Laplacian interpolation.Experimental results on some real images demonstrate that the proposed approach is effective and better than the two commonly used approaches.

Key words: Depth estimation,Defocus blur,GC-PSF

[1] AKBARALLY H,KLEEMAN L.3D robot sensing from sonar and vision[C]∥ 1996 IEEE International Conference on Robo-tics and Automation,1996.IEEE,1996:686-691.
[2] PIERACCINI M,LUZI G,MECATTI D,et al.A microwave radar technique for dynamic testing of large structures[J].IEEE Transactions on Microwave Theory Techniques,2003,51(5):1603-1609.
[3] RAJAGOPALAN A N,Chaudhuri S.Space-Variant Approaches to Recovery of Depth from Defocused Images[J].Computer Vision & Image Understanding,1997,68(3):309-329.
[4] SUBBARAO M.Parallel Depth Recovery By Changing Camera Parameters[C]∥ Second International Conference on Computer Vision.IEEE,1988:149-155.
[5] OLIENSIS J,GENC Y.Fast and Accurate Algorithms for Projective Multi-Image Structure from Motion[J].IEEE Transactions on Pattern Analysis & Machine Intelligence,2001,23(6):546-559.
[6] NG A Y,SUN M,SAXENA A.Make3D:Learning 3-d scene structure from a single still image[C]∥ PAMI.2008:824-840.
[7] PENTLAND P.A New Sense for Depth of Field[J].IEEETransactions on Pattern Analysis & Machine Intelligence,1987,9(4):523-531.
[8] SUBBARAO M,GURMOORTH N.Depth recovery from blur-red edges[M].IEEE,1988.
[9] NAMBOODIRI V P,CHAUDHURI S.Recovery of relativedepth from a single observation using an uncalibrated (real-aperture) camera[C]∥ 2013 IEEE Conference on Computer Vision and Pattern Recognition.IEEE,2008:1-6.
[10] SU Qing-hua,ZHAO Yan,YANG Kui,et al.Calculation Me-thod of Depth in Single Defocused Image[J].Infrared,2013,34(5):16-22.(in Chinese) 苏庆华,赵剡,杨奎,等.单幅散焦图像深度计算方法[J].红外,2013,34(5):16-22.
[11] ZHUO S,SIM T.Defocus map estimation from a single image.[J].Pattern Recognition,2011,44(9):1852-1858.
[12] MING Ying,JIANG Jing-yu.Depth recovery from a single defocused image using a Cauchy-distribution-based point spread function model[J].Journal of Image and Graphics,2015,20(5):708-714.(in Chinese) 明英,蒋晶珏.使用柯西分布点扩散函数模型的单幅散焦图像深度恢复[J].中国图象图形学报,2015,20(5):708-714.
[13] ENS J,LAWRENCE P.An Investigation of Methods for Determining Depth from Focus[J].IEEE Transactions on Pattern Analysis & Machine Intelligence,1993,15(2):97-108.
[14] SUBBARAO M,Choi T S,Nikzad A.Focusing techniques[M].Optical Engineering,1992.
[15] LAN K T,LAN C H.Notes on the Distinction of Gaussian and Cauchy Mutations[C]∥ Eighth International Conference on Intelligent Systems Design and Applications.IEEE Computer So-ciety,2008:272-277.
[16] MING Ying,JIANG Jing-yu.Cauchy Distribution Based on Statistical Change Detection for Visual Surveillance[J].Journal Of Image And Graphics,2008,3(2):328-334.(in Chinese) 明英,蒋晶珏.视觉监视中基于柯西分布的统计变化检测[J].中国图象图形学报,2008,13(2):328-334.
[17] CANNY J.A Computational Approach to Edge Detection[J].IEEE Transactions on Pattern Analysis & Machine Intelligence,1986,8(6):679-698.

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