1. S. Mandayam/ DIP/ECE Dept./Rowan University Digital Image Processing 0909.452.01/0909.552.01 Fall 2001 Shreekanth Mandayam ECE Department Rowan University http://engineering.rowan.edu/~shreek/fall01/dip/ Lecture 11 November 26, 2001

2. S. Mandayam/ DIP/ECE Dept./Rowan UniversityPlan Digital Image Compression Image Compression Standards DCT (JPEG): Lossy Lab 4: Digital Image Compression

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

4. S. Mandayam/ DIP/ECE Dept./Rowan University Compression Model f(x,y) Transform Quantize Encode Source Channel

5. S. Mandayam/ DIP/ECE Dept./Rowan University Discrete Cosine Transform Information Concentration Data Compaction Feature Extraction Discrete Cosine Transform >>dctdemo

6. S. Mandayam/ DIP/ECE Dept./Rowan University Laser Based Ultrasound* *Karta Technologies Inc., San Antonio, TX

7. S. Mandayam/ DIP/ECE Dept./Rowan University Example: Photothermal Shearography Images Before Deformation - After Deformation = Fringe Pattern Sample 10 0.254 mm depth -605.36 MPa stress

8. S. Mandayam/ DIP/ECE Dept./Rowan UniversityPreprocessing Fringe Pattern DCT DCT Coefficients Zonal Mask 1 23451 2345 1 2 3 4 5 (1,1) (1,2) (2,1) (2,2). Feature Vector Artificial Neural Network

9. S. Mandayam/ DIP/ECE Dept./Rowan University JPEG Compression Standard f(x,y) Level Shift Compute DCT F(u,v) Normalize Reorder to form 1-D Sequence Compute DC Coefficient Compute AC Coefficients http://www.jpeg.org/

10. S. Mandayam/ DIP/ECE Dept./Rowan University Karhunen-Loeve (Hotelling) Transform Hotelling transform of x demos/demo7klt/

11. S. Mandayam/ DIP/ECE Dept./Rowan University Lab 4: Digital Image Compression http://engineering.rowan.edu/~shreek/fall01/dip/lab4.html

12. S. Mandayam/ DIP/ECE Dept./Rowan UniversitySummary