1. Digital Image Processing

2. Plan What is an image? Digital image processing
Mathematical representation of monochromatic images
What is a digital image?
Digital image processing
Fundamental steps
Why do we need this?

3. Images
row
column x y
f(x, y)
Sample
Quantize

4. Digital Image y x
Gray
Level
f(x,y)

5. Fundamental Steps* Knowledge Base Representation & Description
Preprocessing
Segmentation
Problem
Domain
Knowledge
Base
Image
Acquisition
Recognition &
Interpretation
Result
*Rafael C. Gonzalez and Richard E. Woods, Digital Image Processing, Addison-Wesley, 1992

6. DIP: Details

7. DIP: Course Logistics

8. Image Preprocessing Enhancement Restoration Inverse filtering
Wiener filtering
Spatial
Domain
Spectral
Domain
Filtering
>>fft2/ifft2
>>fftshift
Point Processing
>>imadjust
>>histeq
Spatial filtering
>>filter2

9. Point Processing (Intensity Transformation)
s(x,y) = T{ r(x,y)}
Transformed
Gray Level
Original
Gray Level
Transformation
Function
>>imadjdemo
>>imadjust