Browse > Article

Isotropic Out-of-focus Blur Estimation and Fully Digital Auto-Focusing Based on A Priori Estimated Set of PSF  

황성현 (중앙대학교)
신정호 (중앙대학교)
이성원 (중앙대학교)
백준기 (중앙대학교)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.41, no.5, 2004 , pp. 235-249 More about this Journal
Abstract
This paper proposes a method for estimating isotropic out-of-focus blur and a fully digital auto-focusing based on a priori estimate set of PSFs. The proposed algorithm for identifying the isotropic PSF is performed by approximating an isotropic blur to a novel discrete PSF model and estimating the PSF model coefficients from degraded edges. After acquiring the set of PSFs by proposed PSF estimation algorithm the proposed fully digital auto-focusing system can restore out-of-focused images by two steps: i) selecting an optimal PSF and ii) restoring the out-of-focused image by digital image restoration.
Keywords
디지털 자동초점;영상복원;점확산함수;블라인드 영상복원;
Citations & Related Records
연도 인용수 순위
  • Reference
1 J. Biemond, R. L. Lagendijk, and R. M. Merserau, 'Iterative Methods for Image Deblurring,' Proc. IEEE, vol. 78, no. 5, pp. 856-883, May 1990   DOI   ScienceOn
2 T. Berger, J. O. Stromberg, and T. Eltoft, 'Adaptive Regularized Constrained Least Squares Image Restoration,' IEEE Trans. Image Proc., vol. 8, no. 9, pp. 1191-1203, September 1999   DOI   ScienceOn
3 B. Noble and J. Daniel, Applied Linear Algebra, Prentice Hall, 3rd edition, 1988
4 J. H. Shin, J. H. Jung, and J. K. Paik, 'Regularized iterative image interpolation and its application to spatially scalable coding,' IEEE Trans. Consumer Electronics, vol. 44, no. 3, pp. 1042-1045, August 1998   DOI   ScienceOn
5 J. Canny, 'A Computational Approach to Edge Detection,' IEEE Trans. Pattern Anal. Machine Intell., vol. PAMI-8, pp. 679-698, June 1986   DOI   ScienceOn
6 W. K. Pratt, Digital Image Processing, 2nd Ed., John Wiley, London, 1991
7 A. K. Jain, 'Advanced in Mathematical Models for Image Processing,' Proc. IEEE, vol. 69, no. 5, pp. 502-528, 1981   DOI   ScienceOn
8 B. R. Hunt, 'The Application of Constrained Least Squares Estimation to Image Restoration by Digital Computer,' IEEE Trans. Computers, vol. C-22(9), pp. 805-812, September 1973   DOI
9 A. K. Katsaggelos, J. Biemond, R. W. Scharfer, and R. L. Mersereau, 'A Regularized Iterative Image Restoration Algorithm,' IEEE Trans. Signal Proc., vol. 39, no. 10, pp. 914-929, April 1991   DOI
10 N. P. Galatsanos and A. K. Katsaggelos, 'Methods for Choosing the Regularization Parameter and Estimating the Noise Variance in Image Restoration and Their Relation,' IEEE Trans. Image Proc., vol. 1, no. 3, pp. 322-336, July 1992   DOI
11 S. K. Kim and J. K. Paik, 'Out-of-Focus Blur Estimation and Restoration for Digital Auto-Focusing System,' Electronics letters, vol. 34, no. 12, pp. 1217-1219, June 1998   DOI   ScienceOn
12 J. Biemond, F. G. van der Putten, and J. Woods, 'Identification and Restoration of Images with Symmetric Noncausal Blurs,' IEEE Trans. Circuits, Systems, vol. 35, no. 4, pp. 385-393, April 1988   DOI   ScienceOn
13 B. C. McCallum, 'Blind Deconvolution by Simulated Annealing,' Optics Communications, vol. 75(2), pp. 101-105, February 1990   DOI   ScienceOn
14 R. L. Lagendijk, J. Biemond, and D. E. Boekee, 'Identification and Restoration of Noisy Blurred Image Using the Expectation-Maximization Algorithm,' IEEE Trans. Acoustics, Speech, Signal Proc., vol. 38 no. 7, pp. 1180-1191, July 1990   DOI   ScienceOn
15 S. J. Reeves and M. R. Mersereau, 'Blur Identification by the Method of Generalized Cross-Validation,' IEEE Trans. Image Processing, vol. 1, no. 3, pp. 301-311, July 1992   DOI
16 D. P. K. Lun, T. C. L. Chan, T. C. Hsung, D. D. Feng, and Y. H. Chan, 'Efficient Blind Restoration Using Discrete Periodic Radon Transform,' IEEE Trans. Image Processing, vol. 13, no. 2, pp. 188-200, February 2004   DOI   ScienceOn
17 D. Kundur and D. Hatzinakos, 'Blind Image Deconvolution,' IEEE Signal Processing Mag., vol. 4, pp. 43-64, May 1996   DOI   ScienceOn
18 A. M. Tekalp and H. Kaufman, 'On Statistical Identification of a Class of Linear Space-Invariant Image Blurs Using Nonminimum-Phase ARMA Models,' IEEE Trans. Acoustics, Speech, Signal Proc., vol. 36, no. 8, pp. 1360-1363, August 1988   DOI   ScienceOn
19 S. K. Kim, S. R. Park, and J. K. Paik, 'Simultaneous Out-of-Focus Blur Estimation and Restoration for Digital AF System,' IEEE Trans. Consumer Electronics, vol. 44, no. 3, pp. 1071-1075, August 1998   DOI   ScienceOn
20 A. M. Tekalp, H. Kaufman, and J. W. Woods, 'Identification of Image and Blur Parameters for the Restoration of Noncausal Blurs,' IEEE Trans. Acoustics, Speech, Signal Proc., vol. ASSP-34, no. 4, pp. 963-972, August 1986
21 A. K. Katsaggelos, 'Maximum Likelihood Image Identification and Restoration Based on the EM Algorithm,' Proc. 1989 Multidimensional Signal Processing Workshop, September 1989   DOI
22 H. C. Andrews and B. R. Hunt, Digital image restoration, Prentice-Hall, New Jersey, 1977