Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Restoration in presense of noise-Only spatial filtering Mean filters Arithmetic filter f(x,y)= (1/mn)( ∑g(s,t)) ( s,t) Є Sxy (area around the pixel) Geometric Mean filter f(x,y)= ( [ п g(s,t)] 1/mn ) ( s,t) Є Sxy (area around the pixel)

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Harmonic mean filter f(x,y)= mn/( ∑1/g(s,t)) ( s,t) Є Sxy (area around the pixel) Contraharmonic mean filter f(x,y)= ( ∑g(s,t) Q+1 )/ ( ∑g(s,t) Q ) Q order of the filter Restoration in presense of noise-Only spatial filtering

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Restoration in presense of noise-Only spatial filtering Order-statistics filters Median filter f(x,y)=median{g(s,t)} ( s,t) Є Sxy (area around the pixel) Max filter f(x,y)= max{g(s,t)} ( s,t) Є Sxy (area around the pixel) Min filter Min f(x,y)= min{g(s,t)} ( s,t) Є Sxy (area around the pixel)

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Restoration in presense of noise-Only spatial filtering Midpoint filter f(x,y)=1/2[max{g(s,t)} +min{g(s,t)}] ( s,t) Є Sxy (area around the pixel) Alpha trimmed mea n filter F(x,y)=( 1/(mn-d)) )∑g r (s,t), g r is the set of pixel left after excluding the d/2 extrem pixels.

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration

Digital Image Processing, 2nd ed. © 2002 R. C. Gonzalez & R. E. Woods Chapter 5 Image Restoration Chapter 5 Image Restoration