S. Mandayam/ DIP/ECE Dept./Rowan University Digital Image Processing 0909.452.01/0909.552.01 Fall 2001 Shreekanth Mandayam ECE Department Rowan University.

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S. Mandayam/ DIP/ECE Dept./Rowan University Digital Image Processing / Fall 2001 Shreekanth Mandayam ECE Department Rowan University Lecture 11 November 26, 2001

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

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

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

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

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

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

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

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

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

S. Mandayam/ DIP/ECE Dept./Rowan University Lab 4: Digital Image Compression

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

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