Pixels.

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Presentation transcript:

Pixels

“How does a computer store the detail of a picture”

pixel PICTURE ELEMENT a

a

Draw the letter a

a Click when done

But how does the computer store this?

The first line consists of one white pixel, then three black, then one white. The the first line is represented as 1, 3, 1. The first number always relates to the number of white pixels. If the first pixel is black the line will begin with a zero.

What do you know so far?

Picture one easy

Try Picture Two or Three

What's is it all about ‘run-length coding’ What about colour?

Your questions