1. S. Mandayam/ DIP/ECE Dept./Rowan University Introduction to Digital Image Processing Shreekanth Mandayam ECE Department Rowan University http://engineering.rowan.edu/~shreek/spring03/cc/ February 25, 2003

2. S. Mandayam/ DIP/ECE Dept./Rowan University

3. Hurricane Fran, TIME Magazine, Sept. 16, 1996 Picture Taken by: GOES-8, NASA GODDARD SPACE FLIGHT CENTER

4. S. Mandayam/ DIP/ECE Dept./Rowan University

9. ABA E-13B Font

10. S. Mandayam/ DIP/ECE Dept./Rowan University

13. Biometrics

14. Module Overview Lecture 1 Digital Image Fundamentals Digital Image Enhancement Lecture 2 Digital Image Segmentation Digital Image Compression

15. S. Mandayam/ DIP/ECE Dept./Rowan University Lecture 1 Digital Image Fundamentals

16. S. Mandayam/ DIP/ECE Dept./Rowan University Lecture 1: Plan What is an image? Mathematical representation of monochromatic images What is a digital image? Digital image processing Fundamental steps Why do we need this? Sampling & Quantization Image Preprocessing

17. S. Mandayam/ DIP/ECE Dept./Rowan UniversityImages x y f(x, y) row column Sample Quantize

18. S. Mandayam/ DIP/ECE Dept./Rowan University Monochromatic Digital Image x y Gray Level f(x,y)

19. S. Mandayam/ DIP/ECE Dept./Rowan University Color Images R B G W M CY Mixtures of Light: Additive Primaries

20. S. Mandayam/ DIP/ECE Dept./Rowan University R+G+B R G B R G B R G B R G B R G B R G B

21. S. Mandayam/ DIP/ECE Dept./Rowan University RGB Color Space

22. S. Mandayam/ DIP/ECE Dept./Rowan University Fundamental Steps* *Rafael C. Gonzalez and Richard E. Woods, Digital Image Processing, Addison-Wesley, 1992 Image Acquisition Image Acquisition Preprocessing (Enhancement & Restoration) Preprocessing (Enhancement & Restoration) Segmentation Representation & Description Representation & Description Recognition & Interpretation Recognition & Interpretation Problem Domain Knowledge Base Knowledge Base Result

23. S. Mandayam/ DIP/ECE Dept./Rowan University DIP: Details

24. S. Mandayam/ DIP/ECE Dept./Rowan University Sampling & Quantization Sampling demos/demo1sampling_and_quantization/demo_sampling.m Quantization demos/demo1sampling_and_quantization/demo_quant.m Digital Image Processing Course Nos. 0909-452-01 (Senior Elective) and 0909-552-01 (Graduate) Fall 2003 Previous Offering: http://engineering.rowan.edu/~shreek/fall01/dip/

25. S. Mandayam/ DIP/ECE Dept./Rowan University DIP: Topics

26. S. Mandayam/ DIP/ECE Dept./Rowan University Image Preprocessing Enhancement Restoration Spatial Domain Spectral Domain Point Processing >>imadjust >>histeq Spatial filtering >>filter2 Filtering >>fft2/ifft2 >>fftshift Inverse filtering Wiener filtering

27. S. Mandayam/ DIP/ECE Dept./Rowan University Point Processing (Intensity Transformation) s(x,y) = T{ r(x,y)} Transformed Gray Level Original Gray Level Transformation Function >>imadjdemo >>imadjust

28. S. Mandayam/ DIP/ECE Dept./Rowan University Point Processing Pixel Operations Point processing Histogram equalization Connectivity individual pixels all pixels neighboring pixels

29. S. Mandayam/ DIP/ECE Dept./Rowan University Point Processing 0 L-1 0 0 0 r s r s r1r1 r2r2 s1s1 s2s2  >>imadjdemo >>imadjust

30. S. Mandayam/ DIP/ECE Dept./Rowan University Image Histogram >>imadjdemo >>imhist

31. S. Mandayam/ DIP/ECE Dept./Rowan University Histogram Equalization (Balancing) >>imadjdemo >>histeq

32. S. Mandayam/ DIP/ECE Dept./Rowan UniversitySummary Digital Image Processing Course Nos. 0909-452-01 (Senior Elective) and 0909-552-01 (Graduate) Fall 2003 Previous Offering: http://engineering.rowan.edu/~shreek/fall01/dip/ Next Tuesday: Lecture 2 Digital Image Segmentation Digital Image Compression