Оценка уровня шума для видео

  • Published on
    02-Nov-2014

  • View
    5

  • Download
    2

Embed Size (px)

DESCRIPTION

 

Transcript

<ul><li> 1. Video GroupCS MSU Graphics &amp; Media Lab09.09.2010 1 </li></ul> <p> 2. BBCTemporal SO MSU Graphics &amp; Media Lab (Video Group) 2 3. : , .MSU Graphics &amp; Media Lab (Video Group) 3 4. . , (AWGN), . x2p ( x) 1 2 e 2 2Additive noise modelg ( x, y) f ( x, y) n( x, y) MSU Graphics &amp; Media Lab (Video Group) http://en.wikipedia.org/wiki/Normal_distribution 4 5. :Intra-frame Filter-based Block-based Wavelet-based Histogram-based Inter-frame MSU Graphics &amp; Media Lab (Video Group)5 6. BBC Temporal SO MSU Graphics &amp; Media Lab (Video Group) 6 7. , : 1. 2. 3. Spatiotonal adaptivity in Super-Resolution of Undersampled Image MSU Graphics &amp; Media Lab (Video Group)Sequences, Ph.D. Thesis, Delft University of Technology, 2006. 7 8. 1. : I1, I2 1 1 2 noise 2 var I1 I 2 2 N I1 I 2 2 1N - N Spatiotonal adaptivity in Super-Resolution of Undersampled Image MSU Graphics &amp; Media Lab (Video Group) Sequences, Ph.D. Thesis, Delft University of Technology, 2006.8 9. 2. , x m 2 g x A exp 2 2 2 2 noise 22 Nelder-Mead, MAE (mean absolute error). Spatiotonal adaptivity in Super-Resolution of Undersampled Image MSU Graphics &amp; Media Lab (Video Group) Sequences, Ph.D. Thesis, Delft University of Technology, 2006.9 10. : .: . : ( )Spatiotonal adaptivity in Super-Resolution of Undersampled Image MSU Graphics &amp; Media Lab (Video Group)Sequences, Ph.D. Thesis, Delft University of Technology, 2006. 10 11. BBCTemporal SO MSU Graphics &amp; Media Lab (Video Group) 11 12. BBC :1. ( )2. 3. 4. 5. . , . MSU Graphics &amp; Media Lab (Video Group) "Video Noise Reduction" BBC Research Dept. 1984 13. BBC 1. . . : 2 0.8 2 1 2 2 0.36 2 , MSU Graphics &amp; Media Lab (Video Group) "Video Noise Reduction" BBC Research Dept. 1984 14. BBC2. . 15 x 5. . , . 2 2 2 n 1 2 2 nn MSU Graphics &amp; Media Lab (Video Group)"Video Noise Reduction" BBC Research Dept. 1984 15. BBC3. . ., ... - , . MSU Graphics &amp; Media Lab (Video Group)"Video Noise Reduction" BBC Research Dept. 1984 16. BBC . ( ). m 1pm x mpx px dx x m p(x) pm(x) m MSU Graphics &amp; Media Lab (Video Group)"Video Noise Reduction" BBC Research Dept. 1984 17. BBC4. E . . 2 2 1 2 2 nE k m E km , MSU Graphics &amp; Media Lab (Video Group)"Video Noise Reduction" BBC Research Dept. 1984 18. BBC5. , .. . min t , t 1 , , . .MSU Graphics &amp; Media Lab (Video Group) "Video Noise Reduction" BBC Research Dept. 1984 19. BBC . . (, ) . 5 , 10 .MSU Graphics &amp; Media Lab (Video Group)"Video Noise Reduction" BBC Research Dept. 1984 20. BBC6. .. , . , - . . , . MSU Graphics &amp; Media Lab (Video Group) "Video Noise Reduction" BBC Research Dept. 1984 21. BBC : . : . : .MSU Graphics &amp; Media Lab (Video Group) "Video Noise Reduction" BBC Research Dept. 1984 22. BBCTemporal SO MSU Graphics &amp; Media Lab (Video Group) 22 23. Temporal SO 1. 3D 2. 3. 1. (S) 2. (T) 3. (ST, VT, HT)4. 5. M. Ghazal, A. Amer, and A. Ghrayeb, Structure-Oriented Spatio- MSU Graphics &amp; Media Lab (Video Group) Temporal Video Noise Estimation, IEEE 2006 23 24. Temporal SO . k I k i i .M. Ghazal, A. Amer, and A. Ghrayeb, Structure-Oriented Spatio- MSU Graphics &amp; Media Lab (Video Group) Temporal Video Noise Estimation, IEEE 2006 24 25. Temporal SO (low-motion), (). , . -.1. S T 1. (S T) 2. 2. ST, VT HT 1. M. Ghazal, A. Amer, and A. Ghrayeb, Structure-Oriented Spatio- MSU Graphics &amp; Media Lab (Video Group) Temporal Video Noise Estimation, IEEE 2006 25 26. Temporal SO 1. : N . S (T), S (T). ST, VT ZT, . () .2. () . M. Ghazal, A. Amer, and A. Ghrayeb, Structure-Oriented Spatio- MSU Graphics &amp; Media Lab (Video Group) Temporal Video Noise Estimation, IEEE 2006 26 27. Temporal SO N S TST VT ZT N . S T ST VT ZT M. Ghazal, A. Amer, and A. Ghrayeb, Structure-Oriented Spatio- MSU Graphics &amp; Media Lab (Video Group)Temporal Video Noise Estimation, IEEE 200627 28. Temporal SO : .: . : . . MSU Graphics &amp; Media Lab (Video Group) "Video Noise Reduction" BBC Research Dept. 1984 29. Temporal SO Prlcar, Tennis, Train, Football, Car Flowergarden 20, 30, 40 dB.M. Ghazal, A. Amer, and A. Ghrayeb, Structure-Oriented Spatio- MSU Graphics &amp; Media Lab (Video Group) Temporal Video Noise Estimation, IEEE 2006 29 30. BBCTemporal SO MSU Graphics &amp; Media Lab (Video Group) 30 31. 1. ( )1. 2. 2. 3. 1. 2. -4. Noise estimation for video processing based on spatial-temporal MSU Graphics &amp; Media Lab (Video Group) gradient histograms, IEEE June 2006.31 32. 2D . HL LH . Noise estimation for video processing based on spatial-temporal MSU Graphics &amp; Media Lab (Video Group)gradient histograms, IEEE June 2006. 32 33. Noise estimation for video processing based on spatial-temporal MSU Graphics &amp; Media Lab (Video Group)gradient histograms, IEEE June 2006. 33 34. 1. : : - : GT r , t HT r , t HT r q, t GS r , t HLr , t LH r , t 2 2 2 2 q r 2. , :hGT , hGS 3. Noise estimation for video processing based on spatial-temporal MSU Graphics &amp; Media Lab (Video Group)gradient histograms, IEEE June 2006. 34 35. , , : GT , GS ~ Rayleigh X , Y ~ N 0, 2 Z X Y ~ Rayleigh 22 x exp : x2 px, , F x, 1 exp 2 2 x2 22 2 : ( x ) arg max L ( x , )Lx, pxi , :xiMSU Graphics &amp; Media Lab (Video Group)http://en.wikipedia.org/wiki/Rayleigh_distribution. 35 36. :p x, x exp x22 2 2 arg max p , x x arg max hGkxMSU Graphics &amp; Media Lab (Video Group) http://en.wikipedia.org/wiki/Rayleigh_distribution. 36 37. -. : max Fn x F x, x 1 Gi x Fn x i 1 1nn F x, 1 exp x22 2 0 x Noise estimation for video processing based on spatial-temporal MSU Graphics &amp; Media Lab (Video Group) gradient histograms, IEEE June 2006.37 38. (S ) : k arg max hG S , S S T Tk k T , k - k C k k C=1.25 :Noise estimation for video processing based on spatial-temporal MSU Graphics &amp; Media Lab (Video Group)gradient histograms, IEEE June 2006. 38 39. : f t t f t 1 2Noise estimation for video processing based on spatial-temporal MSU Graphics &amp; Media Lab (Video Group) gradient histograms, IEEE June 2006.39 40. : : Noise estimation for video processing based on spatial-temporal MSU Graphics &amp; Media Lab (Video Group) gradient histograms, IEEE June 2006.40 41. 8 . .Noise estimation for video processing based on spatial-temporal MSU Graphics &amp; Media Lab (Video Group) gradient histograms, IEEE June 2006.41 42. 8 .43,5 Temporal gradient3 Spatial gradient2,5 MAD2 Moment matching1,5 CDF1 BBC0,5Structure oriented0051015202530 .4,543,5 Temporal gradient32,5 Spatial gradient2 MAD1,51 Moment matching0,50 CDFBBCile eals . s ta anar at Bunitbaob GStructure oriented nmgenoTe ar rM Fos we R le CSa oFl Noise estimation for video processing based on spatial-temporal MSU Graphics &amp; Media Lab (Video Group)gradient histograms, IEEE June 2006. 42 43. 50 352 x 288 Noise estimation for video processing based on spatial-temporal MSU Graphics &amp; Media Lab (Video Group)gradient histograms, IEEE June 2006. 43 44. 1.J. O. Drewery, R. Storey, and N. E. Tanton, "Video Noise Reduction" BBC Research Dept.Rep. BBC RD 1984/7, 19842.T. Kwaaitaal-Spassova G. deHaan and O.A. Ojo, Automatic 2-d and 3-d noise filtering for highquality television receivers, International Workshop on Signal Processing and HDTV, vol. VI,pp. 221230, 1996.3.V. Zlokolica, A. Pizurica, W. Philips, "Noise estimation for video processing based on spatial-temporal gradient histograms" , IEEE Signal Processing Letters, vol. 13, no. 6, pp. 337-340,June 2006.4.T.Q. Pham, Spatiotonal adaptivity in Super-Resolution of Undersampled Image Sequences,Ph.D. Thesis, Quantitative Imaging Group, Delft University of Technology, 2006.5.M. Ghazal, A. Amer, and A. Ghrayeb, "Structure-Oriented Spatio-Temporal Video NoiseEstimation", in Proc. IEEE Int. Conference on Acoustics, Speech, and Signal Processing(ICASSP), Toulouse, France, May 2006, pp. 845-848. MSU Graphics &amp; Media Lab (Video Group) 44 45. ? MSU Graphics &amp; Media Lab (Video Group) 45 </p>