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Digital Images and Binary Code
Transcript of Digital Images and Binary Code
If we were to use Binary code to shade a picture on your grid...
Remember 0 = Off
1 = On
The code would be incredibly long and in efficient
Instead we use the data Compression method, or run-length coding.
Recap on Binary Code
What is Binary Code?
What digits are important in Binary Code?
How is Binary Code used to represent text?
Is text the only type of data that digital systems represent?
How is this image shown on your screen?
Some Questions to think about?
Text is not the only type of data represented on digital systems e.g computers.
Pictures, moving images, and sound are all represented using Binary Code.
To identify how this happens let's do an investigation into how some early digital images were transferred.
What is this device?
What is it's job?
Use the run-length coding on the board to create an image on your grid.
What picture have you drawn?
Check with a partner to see if you have the same image
Now you know a coding system for displaying lack and white pictures!
We have learnt about coding for black and white pictures, how might you digitally represent colour pictures e.g. in .jpeg format?
Pictures can be taken in different resoultions, what will this mean for their coding and file size?
What about moving images? Videos etc?