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Digital + Analogue

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To accompany a talk introducing the concept of a digital image to art and design students.

To accompany a talk introducing the concept of a digital image to art and design students.

Published in: Economy & Finance, Technology
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  • 1. Digital+Analogue
  • 2.  
  • 3.  
  • 4.  
  • 5.  
  • 6. Digital
  • 7. Digital uses discrete values
  • 8. Digital uses discrete values Analogue
  • 9. Digital uses discrete values Analogue uses continuous spectrum of values
  • 10. digit Latin for finger
  • 11. Noise digital signal
  • 12. Noise digital signal signal + noise
  • 13. Noise digital signal signal + noise result
  • 14. Noise analogue signal
  • 15. Noise analogue signal signal + noise
  • 16. Noise analogue signal signal + noise result
  • 17. Data Loss Analogue Digital
  • 18. Data Loss Analogue Digital To sleep perchance to dream To sleep perchance to dream
  • 19. Data Loss Analogue Digital
  • 20. Digital Signals smoke signals morse code computer modem beacon fire
  • 21. Number Systems
  • 22. Decimal base 10 system using ten digits Number Systems
  • 23. Decimal base 10 system using ten digits Binary base 2 system using two digits Number Systems
  • 24. Electronic Signal
  • 25. on off Electronic Signal
  • 26. on 0 off 1 Electronic Signal
  • 27. Binary Numbers 0 1 10 11 100 101 110 111 1000 1001 1010 0 1 2 3 4 5 6 7 8 9 10
  • 28. Digital Data 0 or 1 = a ‘ bit ’ 8 bits = a ‘ byte ’ 1000 bytes = a ‘ kilobyte ’ 1000 kilobytes = a ‘ megabyte ’
  • 29. Digital Data 8 bits 8 7 6 5 4 3 2 1 0 0 0 0 0 1 0 1 can represent values from 0 to 255
  • 30. Digital Data 16 bits 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 can represent values from 0 to 65,535 0 1 0 0 0 1 0 0 1 0 1 0 0 1 1 0
  • 31. Digital Data 24 bits can represent values from 0 to 16,777,215
  • 32. Digital Data 32 bits can represent values from 0 to 4,294,967,295
  • 33. Bitmap Images Bit Depth the number of colours each pixel can represent
  • 34. Bitmap Images Bit Depth R G B
  • 35. Bitmap Images Bit Depth R G B 256 256 256
  • 36. Bitmap Images Bit Depth 256 256 256 x x
  • 37. Bitmap Images Bit Depth 256 256 256 x x = 16,777,216
  • 38. Bitmap Images Bit Depth 256 256 256 x x = 16,777,216 = 24 bit
  • 39. Bitmap Images Pixel Dimensions
  • 40. Bitmap Images Pixel Dimensions horizontal vertical
  • 41. Bitmap Images File Size
  • 42. Bitmap Images File Size Bit Depth x Pixel Dimensions
  • 43. Bitmap Images File Size Bit Depth x Pixel Dimensions 24 bit 640 x 480
  • 44. Bitmap Images File Size Bit Depth x Pixel Dimensions 16,777,216 307,200 x
  • 45. Bitmap Images File Size Bit Depth x Pixel Dimensions a very big number
  • 46. Bitmap Images File Formats bmp gif jpg png psd tif pct eps pdf
  • 47.  
  • 48.  

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