Digital%20Image%20Processing%20ECE.09.452/ECE.09.552%20Fall%202009

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Digital Image ProcessingECE.09.452/ECE.09.552
Fall 2009
Lecture 1September 14, 2009

• Shreekanth Mandayam
• ECE Department
• Rowan University
• http//engineering.rowan.edu/shreek/fall09/dip/

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http//www.apple.com/iphone/
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Galaxies from Ultra-Deep-Field
Pillars of Creation Eagle Nebula (M16)
Supernova remnant Crab Nebula
Jupiter
http//hubblesite.org/
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ABA E-13B Font
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Biometrics
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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

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Images
Sample Quantize
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Digital Image
y
x
Gray Level
f(x,y)
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Color Images
Mixtures of Light Additive Primaries
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RGB Color Space
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Fundamental Steps
Representation Description
Preprocessing
Segmentation
Knowledge Base
Problem Domain
Image Acquisition
Recognition Interpretation
Result
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The Human Eye
Sagittal section of adult human eye
Section of human retina
http//webvision.med.utah.edu/anatomy.html
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Perceived Brightness
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Perceived Contrast
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Optical Illusions
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DIP Details
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DIP Course Logistics
http//engineering.rowan.edu/shreek/fall09/dip/
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Sampling Quantization

• Sampling
• demos/demo1sampling_and_quantization/demo_sampling
  .m
• Quantization
• demos/demo1sampling_and_quantization/demo_quant.m

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Image Preprocessing
Restoration
Enhancement

• Inverse filtering
• Wiener filtering

Spatial Domain
Spectral Domain

• Filtering
• gtgtfft2/ifft2
• gtgtfftshift

• Point Processing
• gtgtimadjust
• gtgthisteq

• Spatial filtering
• gtgtfilter2

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Point Processing(Intensity Transformation)
s(x,y) T r(x,y)
Transformed Gray Level
Original Gray Level
Transformation Function
gtgtimadjust
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Pre-Lab 1 Intro to Matlab IP Toolbox
http//engineering.rowan.edu/shreek/fall09/dip/ip
intro.html
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Summary