1. Introduction to Digital Image Processing
GG5018
Lecture 1
David R. Green – G12

2. Contents Introduction Reading Assignments Software/Hardware
Online Tutorials
What is Digital Image Processing?
OBJECTIVE: To introduce the fundamentals
of Digital Image Processing

3. Jensen ITC Book Websites
Reading
Jensen
ITC Book
Websites

4. Assignments Assignments Online Tour Guide (Erdas Imagine)
Consolidation (Week 6-12)
Additional e.g. manual DIP Exercise

5. Software Erdas Imagine (powerful ‘standard’)
ER-Mapper (equivalent to Erdas)
PCI-Easipace (equivalent to Erdas)
Envi (Hyperspectral)
Pixoneer Earth/PG-Steamer ((equivalent to Erdas)
Idrisi Kilimanjaro (integrated GIS/RS)
ArcView and Image Analyst (simple extension)
Multispec (Hyperspectral)

6. Hardware Hardware specification: Desktop Fast Processor (Pentium IV)
Large RAM
Large Storage Capacity (hard-disk)
Large Backup Capacity
Large Colour Display Monitor
Good Graphics Card with on-board RAM
Peripherals: scanner, printer, digitiser

7. Online Tutorials http://www.r-s-c-c.org/rscc/v3.html
etc…….

8. What is Digital Image Processing?
Data into Information pathway
The Remote Sensing Process
Problem/Data Collection/Data Analysis/Information Presentation

9. What is Digital Image Processing?

10. What is Digital Image Processing?

11. What is Digital Image Processing?
Computer-based processing of spatial data/imagery (from remote sensing sensors/platforms) into information
Includes aerial photography, airborne data/imagery and satellite-borne data/imagery
Integration with other spatial datasets
Bi-directional relationship between RS/GIS

12. What is Digital Image Processing?
Origins: JPL (Jet Propulsion Laboratory - USA)
Image restoration for non-Earth data/imagery
Relationship to digital image processing e.g. Paintshop Pro, Photoshop
Digital Cameras and Photographs
Relationship to computer graphics (whole to parts:parts to whole)

13. What is Digital Image Processing?
Importance of knowledge of remote sensing sensors and platforms
Ground-Truthing/Fieldwork
Statistics (univariate and multivariate)
Image Processing Techniques
Visualisation
Hardware and Software
Digital Mapping/GIS - Integration
Expert Systems and AI

14. What is Digital Image Processing?
128
128 DN
0-256
8 BIT
128
128
128
128

15. What is Digital Image Processing?
Columns (j)
Image: number (0-255) or 8-bit
GIS: number (code)
1,1 12
Row, column or x,y numbers provide
an address for each cell e.g. 1,1; 3,3
etc… (similarity of spreadsheet) 32 45
Addressing can be used to
manipulate data store in each cell
e.g. digital image processing
3,3
Rows (i)
e.g. mat (2,2) = 32
Multiple matrices e.g. bands
of data/imagery; raster maps; digital
images

16. What is Digital Image Processing?
Structure of Jensen’s book:
Image Processing System
Display System
Initial Image Statistics Extraction
Pre-Processing
Image Enhancement
Classification (Supervised and Unsupervised)
Error Assessment
Other: Change Detection, GIS
1,1

17. What is Digital Image Processing?
255
1,1
Linear
Output - Screen Display
Breakpoints (Stepped)
255
Input - File Data e.g. Band 3

18. What is Digital Image Processing?
168
100
255
Linear Contrast Stretch
255
Applies to each colour gun (RGB) individually, pairs or all

19. Erdas Imagine 8.7 Tour Guide
Online TOUR GUIDE
Start to work your way through this as soon as possible
There will be a QUIZ on the contents