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Introduction to Digital Image Processing GG5018 Lecture 1 David R. Green – G12 0101011011 0101010100 0110101000 1010111101 1111001010.

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Presentation on theme: "Introduction to Digital Image Processing GG5018 Lecture 1 David R. Green – G12 0101011011 0101010100 0110101000 1010111101 1111001010."— Presentation transcript:

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

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

3 Reading Jensen ITC Book Websites

4 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 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?

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11 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 DN BIT

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

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

17 What is Digital Image Processing? 1,1 Input - File Data e.g. Band 3 Output - Screen Display 0255 Linear Breakpoints (Stepped)

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

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


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