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

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

Jensen ITC Book Websites Reading Jensen ITC Book Websites

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

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)

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

Online Tutorials http://www.r-s-c-c.org/rscc/v3.html http://rst.gsfc.nasa.gov/Front/overview.html http://www.cas.sc.edu/geog/rslab/751/index.html http://www.ccrs.nrcan.gc.ca/ccrs/learn/tutorials/digitech/digitech_e.html etc…….

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

What is Digital Image Processing?

What is Digital Image Processing?

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

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)

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

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

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

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

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

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

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