lecture 3: imagesintro to it cosc1078 introduction to information technology lecture 3 images james...
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Lecture 3: Images Intro to IT
COSC1078 Introduction to Information Technology
Lecture 3
ImagesJames Harland
Lecture 3: Images Intro to IT
Introduction to IT
1 Introduction
2 Images
3 Audio
4 Video WebLearn Test 1
5 Computer Fundamentals Assignment 1
6 Computer Fundamentals
7 Computer Fundamentals
8 Operating Systems WebLearn Test 1
9 Operating Systems Assignment 2
10 Internet
11 Internet Security WebLearn Test 3
12 Future of IT Assignment 3, Peer and Self Assessment
Lecture 3: Images Intro to IT
Overview
Questions?
Images
Assignment 1
Lab classes
Questions?
Lecture 3: Images Intro to IT
Introduction
James Harland• Email: [email protected]• URL: www.cs.rmit.edu.au/~jah• Phone: 9925 2045• Office: 14.8.13 (Building 14, level 8, room 13)• Consultation: Wed 1.30-2.30, Thu 11.30-12.30
What colour is my office door? Carpet? Chair?
Lecture 3: Images Intro to IT
Overview
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Lecture 3: Images Intro to IT
Representing Images
Pixel
Lecture 3: Images Intro to IT
Representing Images
Pixel
Lecture 3: Images Intro to IT
Representing Images
Pixel `picture element’ (sampling) dot of colourResolutionnumber of pixels6 megapixels means 3000 x 2000Bit depth How many colours per pixel (quantizing)The bigger this value is, the more colours can be displayed
Lecture 3: Images Intro to IT
Representing Images
These are known as bitmapped images(or raster graphics) Can be edited pixel by pixel Appearance can look bad when sizes are changed Low resolution versions generally look horrible! Jpeg, gif, bmp, png, tif,…
Lecture 3: Images Intro to IT
Representing Images
Vector graphics use equations to represent images generally saves space resolution independent (ie can be rescaled to any size without loss of quality) can be rasterized (ie converted into bitmapped representation) eps, wmf, …
Lecture 3: Images Intro to IT
Representing Images
Vector graphics use equations to represent images generally saves space resolution independent (ie can be rescaled to any size without loss of quality) can be rasterized (ie converted into bitmapped representation) eps, wmf, …
Lecture 3: Images Intro to IT
Representing Colours
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PixelR
GB
Lecture 3: Images Intro to IT
Representing Colours
There are various different schemes for representing colours
RGB CMYK HSB HSL CIE XYZ
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Lecture 3: Images Intro to IT
Assignment 1
Use GIMP (or a similar tool) to perform some manipulations on an image
Address two issues in relation to this
Lab classes 2 and 3 will be based around GIMP
Main emphasis is on process, not result!
Will be released (on the Learning Hub) by Wednesday 10th March
Lecture 3: Images Intro to IT
Lab Classes
Start in week 2 (this week)
Work on practical exercises and sometimes assignment materials
Lab assists present to help and an answer questions
Details will be in the Learning Hub
Lecture 3: Images Intro to IT
Conclusion
Go to laboratory classes (and tutorials) this week!
Lab notes in the Learning Hubub
Check details in Course Guide
Start reading (notes, problems, report topic)
GET THE BOOK!