Download - Noise Models
![Page 1: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/1.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 1
Digital Image Processing
Image Restoration
Noise models and additive noise removal
![Page 2: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/2.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 2
Image Restoration
![Page 3: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/3.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 3
Image Restoration
What is noise (in the context of image processing) and how can it be modeled?
What are the main types of noise that may affect an image? What are the possible solutions?
Subjective Vs Objective (Enhancement Vs Restoration)
![Page 4: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/4.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 4
Degradation Model for a Digital Image
![Page 5: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/5.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 5
Noise Models
![Page 6: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/6.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 6
Noise and Noise Models
Gaussian (normal) Impulse (salt-and-pepper) Uniform Rayleigh Gamma (Erlang) Exponential
![Page 7: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/7.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 7
Effect of Noise on Images & Histograms
Gaussian
Exponential
Impulse (salt-and-pepper)
![Page 8: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/8.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 8
Effect of Noise on Images & Histograms
Rayleigh
Gamma (Erlang)
Uniform
![Page 9: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/9.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 9
Noise Models: Gaussian Noise
![Page 10: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/10.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 10
Noise Models: Rayleigh Noise
![Page 11: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/11.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 11
Noise Models: Erlang (Gamma) Noise
![Page 12: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/12.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 12
Noise Models: Exponential Noise
Where
![Page 13: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/13.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 13
Noise Models: Uniform Noise
The mean and variance are given by
otherwise 0
if ,1)(
bzaabzp
12)(,
2
22 abba
![Page 14: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/14.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 14
Noise Models: Impulse (Salt and Pepper) Noise
![Page 15: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/15.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 15
Effect of Noise on Images & Histograms
![Page 16: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/16.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 16
Effect of Noise on Images & Histograms
![Page 17: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/17.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 17
Effect of Noise on Images & Histograms
![Page 18: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/18.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 18
Periodic Noise (Example)
Spatially Dependent Case
![Page 19: Noise Models](https://reader031.vdocuments.us/reader031/viewer/2022013118/559870481a28abc26a8b47c5/html5/thumbnails/19.jpg)
5/13/2013 COMSATS Institute of Information Technology, Abbottabad Digital Image Processing CSC330 19
Applicability of various noise models