S. Mandayam/ ECE Dept./Rowan University Freshman Clinic II Spring 2005 Shreekanth Mandayam ECE Department Rowan University Digital Imaging April 19, 2005.

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Presentation transcript:

S. Mandayam/ ECE Dept./Rowan University Freshman Clinic II Spring 2005 Shreekanth Mandayam ECE Department Rowan University Digital Imaging April 19,

S. Mandayam/ ECE Dept./Rowan University Plan Digital image acquisition Types of digital images Monochromatic TrueColor Digital Image Processing

S. Mandayam/ ECE Dept./Rowan University Digital Image Acquisition How do we acquire digital images?

S. Mandayam/ ECE Dept./Rowan University

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

S. Mandayam/ ECE Dept./Rowan University

ABA E-13B Font

S. Mandayam/ ECE Dept./Rowan University

Biometrics

Types of Digital Images Monochromatic TrueColor

S. Mandayam/ ECE Dept./Rowan University Monochromatic Digital Image x y Gray Level f(x,y) Pixel = Picture Element

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

S. Mandayam/ ECE Dept./Rowan University Color Palette All shades of color that you see on a computer screen are made up by adding the 3 primary colors for each pixel G R B

S. Mandayam/ ECE Dept./Rowan University RGB Values for Each Pixel G= 1 to 256 R= 1 to 256 B= 1 to 256 “Redness” “Green-ness” “Blueness” 1 = No red 256 = Bright red 1 = No green 256 = Bright green 1 = No blue 256 = Bright blue

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

How many colors? How many shades of color can you get in each pixel of a TrueColor image?

S. Mandayam/ ECE Dept./Rowan University Summary

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