Graphics Mr Arthur
Aims of the Lesson <ul><li>To cover the following Graphical concepts </li></ul><ul><ul><li>Graphical Tools </li></ul></ul>...
Features of Graphics Packages <ul><li>Change line thickness </li></ul><ul><li>Scale Graphic </li></ul><ul><ul><li>Alter th...
Common Tools <ul><li>Shapes  – Circles, Rectangle, Polygon </li></ul><ul><li>Free hand drawing  – Pencil, Brush </li></ul>...
Aims of the Lesson 2 <ul><li>To cover the following Graphical concepts </li></ul><ul><ul><li>Resolution </li></ul></ul><ul...
Pixels <ul><li>Graphics are made up of tiny dots called pixels. </li></ul><ul><li>The quality of the picture is determined...
Calculating Storage Requirements <ul><li>The image below has 16 pixel across and 16 pixels </li></ul><ul><li>down. Calcula...
Calculating Storage Requirements <ul><li>The image below has 500 pixels across and 300 pixels down. Calculate the memory r...
Calculating Storage Requirements <ul><li>The image below is 2 inches across x 2 inches down. The resolution is 400 d.p.i. ...
Storage Requirements of Pictures <ul><li>The image is stored as a black and white bit-mapped graphic, measuring 4 inches b...
Revising Graphics <ul><li>Give 3 tools that I have used to create the following drawing </li></ul>
Revising Graphics <ul><li>What has happened to this image? </li></ul>
Revising Graphics <ul><li>What has happened to this image? </li></ul>
Revising Graphics <ul><li>What has happened to this image? </li></ul>
Revising Graphics <ul><li>What has happened to this image? </li></ul>
Revising Graphics <ul><li>What is a pixel? </li></ul><ul><li>What is resolution? </li></ul><ul><li>What is the measurement...
Storage Requirements of Pictures <ul><li>The image below is stored as a black and white bit-mapped graphic, 800 pixels acr...
Storage Requirements of Pictures <ul><li>The image is stored as a black and white bit-mapped graphic, measuring 2 inches b...
Storage Requirements of Pictures <ul><li>The image is stored as a black and white bit-mapped graphic, measuring 3 inches b...
Revising Graphics <ul><li>How many faces do you see? </li></ul>
Revising Graphics <ul><li>Are these circle spinning? </li></ul>
Revising Graphics
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Graphics slides

  1. 1. Graphics Mr Arthur
  2. 2. Aims of the Lesson <ul><li>To cover the following Graphical concepts </li></ul><ul><ul><li>Graphical Tools </li></ul></ul><ul><ul><li>Manipulation of images </li></ul></ul>
  3. 3. Features of Graphics Packages <ul><li>Change line thickness </li></ul><ul><li>Scale Graphic </li></ul><ul><ul><li>Alter the size of the graphic </li></ul></ul><ul><li>Rotate Graphic </li></ul><ul><ul><li>Turn it around </li></ul></ul><ul><li>Crop </li></ul><ul><ul><li>Reduces its size by cutting parts from the edges </li></ul></ul>
  4. 4. Common Tools <ul><li>Shapes – Circles, Rectangle, Polygon </li></ul><ul><li>Free hand drawing – Pencil, Brush </li></ul><ul><li>Fill </li></ul><ul><li>Eraser </li></ul><ul><li>Zoom </li></ul><ul><li>Spray paint </li></ul><ul><li>Straight Line </li></ul><ul><li>Curve Line </li></ul>
  5. 5. Aims of the Lesson 2 <ul><li>To cover the following Graphical concepts </li></ul><ul><ul><li>Resolution </li></ul></ul><ul><ul><li>Graphics Calculations </li></ul></ul>
  6. 6. Pixels <ul><li>Graphics are made up of tiny dots called pixels. </li></ul><ul><li>The quality of the picture is determined by the number of pixels per inch. This is called the Resolution </li></ul><ul><li>The more pixels there are per inch the clearer the image is </li></ul>LOW RESOLUTION HIGH RESOLUTION
  7. 7. Calculating Storage Requirements <ul><li>The image below has 16 pixel across and 16 pixels </li></ul><ul><li>down. Calculate the memory requirements to the </li></ul><ul><li>nearest Kb </li></ul><ul><li>16 X 16 </li></ul><ul><li>256 bits / 8 </li></ul><ul><li>32 kilobytes </li></ul>
  8. 8. Calculating Storage Requirements <ul><li>The image below has 500 pixels across and 300 pixels down. Calculate the memory requirements to the nearest Kb </li></ul><ul><li>500 X 300 </li></ul><ul><li>150,000 bits / 8 </li></ul><ul><li>18,750 bytes / 1024 </li></ul><ul><li>18.31 kilobytes </li></ul>
  9. 9. Calculating Storage Requirements <ul><li>The image below is 2 inches across x 2 inches down. The resolution is 400 d.p.i. (dots per inch) Calculate the memory requirements </li></ul><ul><li>800 X 800 </li></ul><ul><li>640,000 bits / 8 </li></ul><ul><li>80,000 bytes / 1024 </li></ul><ul><li>78.125 kilobytes </li></ul>2 inches X 400 = 800 dots 2 inches X 400 = 800 dots
  10. 10. Storage Requirements of Pictures <ul><li>The image is stored as a black and white bit-mapped graphic, measuring 4 inches by 4 inches with a Resolution of 300dpi </li></ul><ul><li>Calculate the storage requirements in Kilobytes </li></ul><ul><li>(4 X 300) = 1200 </li></ul><ul><li>(4 X 300) = 1200 </li></ul><ul><li>1200 X 1200 = 1,440,000 bits </li></ul><ul><li>1,440,000 bits </li></ul><ul><li> 8 = 180,000 bytes </li></ul><ul><li>180,000bytes </li></ul><ul><li>1024 = 175.8 Kilobytes </li></ul>
  11. 11. Revising Graphics <ul><li>Give 3 tools that I have used to create the following drawing </li></ul>
  12. 12. Revising Graphics <ul><li>What has happened to this image? </li></ul>
  13. 13. Revising Graphics <ul><li>What has happened to this image? </li></ul>
  14. 14. Revising Graphics <ul><li>What has happened to this image? </li></ul>
  15. 15. Revising Graphics <ul><li>What has happened to this image? </li></ul>
  16. 16. Revising Graphics <ul><li>What is a pixel? </li></ul><ul><li>What is resolution? </li></ul><ul><li>What is the measurement of resolution? </li></ul>
  17. 17. Storage Requirements of Pictures <ul><li>The image below is stored as a black and white bit-mapped graphic, 800 pixels across by 400 pixels down. Calculate the storage requirements in Kilobytes </li></ul><ul><li>800 X 400 </li></ul><ul><li>= 320,000 bits </li></ul><ul><li>320,000/8 </li></ul><ul><li>40,000 bytes </li></ul><ul><li>40,000 / 1024 </li></ul><ul><li>= 39.06 Kilobytes </li></ul>
  18. 18. Storage Requirements of Pictures <ul><li>The image is stored as a black and white bit-mapped graphic, measuring 2 inches by 3 inches with a Resolution of 500dpi </li></ul><ul><li>Calculate the storage requirements in Kilobytes </li></ul><ul><li>(2 X 500) = 1000 </li></ul><ul><li>(3 X 500) = 1500 </li></ul><ul><li>1000 X 1500 = 1,500,000 bits </li></ul><ul><li>1,500,000 </li></ul><ul><li>8 = 187500 bytes </li></ul><ul><li>187500 </li></ul><ul><li>1024 = 183.1Kb </li></ul>
  19. 19. Storage Requirements of Pictures <ul><li>The image is stored as a black and white bit-mapped graphic, measuring 3 inches by 4 inches with a Resolution of 200dpi </li></ul><ul><li>Calculate the storage requirements in Kilobytes </li></ul><ul><li>(3 X 200) = 600 </li></ul><ul><li>(4 X 200) = 800 </li></ul><ul><li>600 X 800 = 480,000 bits </li></ul><ul><li>480,000 </li></ul><ul><li>8 = 60,000 bytes </li></ul><ul><li>60,000 </li></ul><ul><li>1024 = 58.59Kb </li></ul>
  20. 20. Revising Graphics <ul><li>How many faces do you see? </li></ul>
  21. 21. Revising Graphics <ul><li>Are these circle spinning? </li></ul>
  22. 22. Revising Graphics

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