S Mandayam DIPECE Dept Rowan University Digital Image

S. Mandayam/ DIP/ECE Dept. /Rowan University Digital Image Processing ECE. 09. 452/ECE. 09. 552 Fall 2007 Lecture 1 September 10, 2007 Shreekanth Mandayam ECE Department Rowan University http: //engineering. rowan. edu/~shreek/fall 07/dip/

S. Mandayam/ DIP/ECE Dept. /Rowan University http: //www. apple. com/iphone/

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

S. Mandayam/ DIP/ECE Dept. /Rowan University Hurricane Katrina regional imagery, 2005. 08. 29 at 1215 Z. Centerpoint Latitude: 31: 10: 43 N Longitude: 88: 50: 53 W.

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

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

S. Mandayam/ DIP/ECE Dept. /Rowan University ABA E-13 B Font

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

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

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

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

S. Mandayam/ DIP/ECE Dept. /Rowan University 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? • Course logistics • Self-Assessment Test • Sampling & Quantization • Image Preprocessing • Pre-Lab 1

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

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

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

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

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

S. Mandayam/ DIP/ECE Dept. /Rowan University Fundamental Steps Preprocessing Problem Domain Image Acquisition Segmentation Knowledge Base Representation & Description Recognition & Interpretation Result

S. Mandayam/ DIP/ECE Dept. /Rowan University The Human Eye Sagittal section of adult human eye Section of human retina http: //webvision. med. utah. edu/anatomy. html

S. Mandayam/ DIP/ECE Dept. /Rowan University Perceived Brightness

S. Mandayam/ DIP/ECE Dept. /Rowan University Perceived Contrast

S. Mandayam/ DIP/ECE Dept. /Rowan University Optical Illusions

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

S. Mandayam/ DIP/ECE Dept. /Rowan University DIP: Course Logistics http: //engineering. rowan. edu/~shreek/fall 07/dip/

S. Mandayam/ DIP/ECE Dept. /Rowan University Sampling & Quantization • Sampling demos/demo 1 sampling_and_quantization/demo_sampling. m • Quantization demos/demo 1 sampling_and_quantization/demo_quant. m

S. Mandayam/ DIP/ECE Dept. /Rowan University Image Preprocessing Restoration Enhancement Spectral Domain Spatial Domain Point Processing • >>imadjust • >>histeq Spatial filtering • >>filter 2 Filtering • >>fft 2/ifft 2 • >>fftshift • Inverse filtering • Wiener filtering

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

S. Mandayam/ DIP/ECE Dept. /Rowan University Pre-Lab 1: Intro to Matlab IP Toolbox http: //engineering. rowan. edu/~shreek/fall 07/dip/ipintro. html

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