1. Digital Image processing Homework 4
Jheng-Ping Lin
Visual Communications Lab
Department of Communication Engineering
National Central University
Jhongli,Taiwan
December 11, 2008

2. Image Restoration for Image Blurring
Deblurring
Filter
Restoration
Blurred Image

3. Degradation Function (1/2)

4. Degradation Function (1/2)
K=0.01
K=0.008
K=0.005
K=0.001

5. Image Blurring due to Different K
Original Image
K=0.005
K=0.001

6. Deblurring for Image BlurringK
DFT
(FFT)
Blurred Image
IDFT
(IFFT)
Restoration

7. Problems on Implement (1/2)
Close to zero
Blurred Image
Error Image
H (u, v)

8. Problems on Implement (2/2)K
DFT
(FFT)
Blurred Image
IDFT
(IFFT)
Restoration

9. Homework Assignment Part 1 (80%): Image restoration for K=0.0025.
Image restoration for unknown K.
Blurred image download link:

10. Deadline Demo : 2008/12/24, 8:00~9:00 pm Report : 2008/12/24, 6:00 pm

11. References
Rafael C. Gonzalez, Richard E. Woods, “Digital Image Processing 3rd”, pp , August, 2008.