S. Mandayam/ DIP/ECE Dept./Rowan University Digital Image Processing ECE /ECE Fall 2009 Shreekanth Mandayam ECE Department Rowan University Lecture 1 September 14, 2009

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

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

“Pillars of Creation” Eagle Nebula (M16) Supernova remnant: Crab Nebula Jupiter Galaxies from Ultra-Deep-Field

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

ABA E-13B Font

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

Biometrics

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 UniversityImages x y f(x, y) row column Sample Quantize

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

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

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

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

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

S. Mandayam/ DIP/ECE Dept./Rowan University The Human Eye Section of human retina Sagittal section of adult human eye

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

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

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

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 >>imadjust

S. Mandayam/ DIP/ECE Dept./Rowan University Pre-Lab 1: Intro to Matlab IP Toolbox

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