By Alistair Edwards

ISBN-10: 0748621679

ISBN-13: 9780748621675

This ebook is geared toward scholars who're contemplating learning desktop technological know-how or a similar subject at college. half One is a short advent to the subjects that make up machine technological know-how, a few of which you'd anticipate finding as direction modules in a working laptop or computer technology programme. those descriptions may help you to inform the variation among desktop technology as taught in several departments and so assist you to settle on a direction that most nearly fits you.

Part builds on what you will have realized concerning the nature of computing device technological know-how by means of supplying you with suggestions in deciding upon universities and making your purposes to them. Then half 3 can provide a few suggestion on what to do when you get to college, the way to get the main out of learning your machine technology measure. The central target of the e-book is to provide satisfied scholars, scholars who comprehend what they're letting themselves in for once they commence a working laptop or computer technology direction, and for that reason locate themselves rather well fitted to the direction they choose.

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Additional info for Get Set for Computer Science (Get Set for University)

Sample text

Digital communications are – or can be – relatively robust in respect of such errors. Extra information can be added to a message making it possible to detect the occurrence of an error. One method is for a computer sending a message to send also the number of characters in that message. If the receiver receives a different number of characters, then an error has occurred. By adding still more information with the 45 46 GET SET FOR COMPUTER SCIENCE message, it can be possible to pinpoint the error and even to correct it.

Thus there are rules (known as protocols) which are standardised across the network. These protocols can be quite complex and are often structured in layers, reflecting the different levels of communication that underlie them. Different protocols provide different features – different qualities of service – depending on the type of communication required. For instance, for some highreliability purposes it can be important to ensure that a communication sent from one computer does arrive at its intended destination.

Computer vision is concerned with both low and high levels of processing. At the low level there is some form of representation of a visual image containing certain features which are important. The lowest level representation is a sequence of numbers representing each of the pixels of a picture. The number will represent the colour and brightness of the picture at that point. One pixel does not give us much information about the picture, but if a computer program examines the information for a group of pixels, it can pick out features from the image.

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Get Set for Computer Science (Get Set for University) by Alistair Edwards

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