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Digital Cameras

Digital Cameras.

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Digital Cameras

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  1. Digital Cameras

  2. Painting “A Sunday Afternoon on the Island of La Grande Jatte” by French artist Georges Seurat – a master of a technique known as pointillism, in which scenes are composed of millions of tiny dots of paint, created by dabbing the canvas with the tip of a paintbrush. Stand across the room from a pointillist painting, the dots blend together – only when you get close can you distinguish the individual dots.

  3. Pixels • Digital images work like pointillist paintings. • Rather than being made up of dots of paint, digital images are composed of tiny squares of colour known as pixels. • Pixel is short for Picture Element Canning College Computing Centre - Vicki Thomas

  4. How Digital Cameras Work • They have a sensor, which under a microscope looks like a honeycomb. • Each cell is a mini light receptor. • Cells are subjected to light via the camera lens. • The degree to which they are filled corresponds with how bright a pixel becomes. Canning College Computing Centre - Vicki Thomas

  5. Sensors • Digital cameras use either CCD or CMOS sensors. Canning College Computing Centre - Vicki Thomas

  6. CCD & CMOS Sensors • CCD – charge-coupled device. • CMOS – complementary metal oxide semiconductor. • Originally most cameras used CCD because CMOS sensors were considered inferior. Recent advances have made them competitive with CCD. • CMOS consumes less energy. Canning College Computing Centre - Vicki Thomas

  7. Resolution • The quality of a digital image depends on the number and density of pixels within it. Canning College Computing Centre - Vicki Thomas

  8. Resolution 1280 • A sensor with 1280 pixels by 1084 pixels would have a total of1280 x 1084 or 1,310,720 pixels (1.3 Megapixels) • What are the common resolutions available in cameras today? 1084 Canning College Computing Centre - Vicki Thomas

  9. PRACTICAL • Start Windows Explorer and navigate to: • C:\Student\AIT\Demo Images • Open Barcelona.jpg in Photoshop • Display File Info • What are the dimensions of the image? • What is the megapixel “size” of the image? • (______ x ______) / 1,000,000 = • What is the size of the image file on disk? Canning College Computing Centre - Vicki Thomas

  10. Autofocus and Focus Lock Images from http://www.howstuffworks.com/autofocus6.htm Canning College Computing Centre - Vicki Thomas

  11. Autofocus and Focus Lock • PRACTICAL • Take a photo of the person sitting next to you using the focus lock technique • Take another photo not using the technique • Compare the 2 images, using zoom to determine if the person is in focus in each shot Canning College Computing Centre - Vicki Thomas

  12. LCD Display • PRACTICAL • Turn on your camera and check the info shown on the display • Can you turn on additional info via a menu option? Canning College Computing Centre - Vicki Thomas

  13. Zoom • Olympus 550 demo Canning College Computing Centre - Vicki Thomas

  14. Composition • General guidelines to follow rather than compulsory rules • Question – What is the purpose of the photo? • Question – How will I guide the viewer’s eye? • Question – How will I give the image depth? Canning College Computing Centre - Vicki Thomas

  15. Purpose of Photo Canning College Computing Centre - Vicki Thomas

  16. Purpose of Photo Canning College Computing Centre - Vicki Thomas

  17. Frame the Subject Canning College Computing Centre - Vicki Thomas

  18. Amount of Background Zoomed in to fill frame Moved closer to fill frame Canning College Computing Centre - Vicki Thomas

  19. Fill the Frame Canning College Computing Centre - Vicki Thomas

  20. Fill Frame, Check Background Person larger and beach visible Canning College Computing Centre - Vicki Thomas

  21. Rule of Thirds Divide the image into thirds both hoizontally and vertically. This will result in 3 rows and 3 columns. Place the subject at one of the four points where the dividing lines intersect. This means that you have to overcome the natural tendency to place the object of interest in the centre of the frame. Canning College Computing Centre - Vicki Thomas

  22. Rule of Thirds - Applied For more information: http://www.ictpd.net/moodle/mod/resource/view.php?id=489 Canning College Computing Centre - Vicki Thomas

  23. Works in Portrait as well Canning College Computing Centre - Vicki Thomas

  24. Thirds and Filling the Frame Canning College Computing Centre - Vicki Thomas

  25. Horizon can’t be lower Rule of Thirds - Partial Pay close attention to horizons - generally the horizon would be no more than the top third or quarter of the frame unless the sky is the main subject. Aim to position the horizon on one of the horizontal lines. Canning College Computing Centre - Vicki Thomas

  26. Rule of Thirds - Applied Canning College Computing Centre - Vicki Thomas

  27. Rule of Thirds - Broken Canning College Computing Centre - Vicki Thomas

  28. Horizons and the Rule of Thirds Three other Rules involved here Leading space for motion Symmetry Silhouette Canning College Computing Centre - Vicki Thomas

  29. Avoid Clutter or Distractions Images from http://www.ictpd.net/moodle/course/view.php?id=13 Canning College Computing Centre - Vicki Thomas

  30. Avoid Clutter or Distractions Images from http://www.ictpd.net Canning College Computing Centre - Vicki Thomas

  31. Repetitive Images Make Good Compositions Canning College Computing Centre - Vicki Thomas

  32. Repetition Canning College Computing Centre - Vicki Thomas

  33. Creating Depth Canning College Computing Centre - Vicki Thomas

  34. Depth and Interest Canning College Computing Centre - Vicki Thomas

  35. Watch for Merging Images from http://www.ictpd.net Canning College Computing Centre - Vicki Thomas

  36. Look into Photo (at camera) Images from http://www.ictpd.net Canning College Computing Centre - Vicki Thomas

  37. Depth and Balance Images from http://www.ictpd.net Canning College Computing Centre - Vicki Thomas

  38. S Bends and Crescents Photograph by one of Australia’s most famous photographers – Max Dupain Canning College Computing Centre - Vicki Thomas

  39. Max DuPain Sunbaker Canning College Computing Centre - Vicki Thomas

  40. Max Dupain Bondi Canning College Computing Centre - Vicki Thomas

  41. Use Curves Canning College Computing Centre - Vicki Thomas

  42. Use Curves Canning College Computing Centre - Vicki Thomas

  43. And Lines into Corners Canning College Computing Centre - Vicki Thomas

  44. Angles to Draw Attention Canning College Computing Centre - Vicki Thomas

  45. Perspective Images from http://www.ictpd.net Canning College Computing Centre - Vicki Thomas

  46. Camera Orientation Canning College Computing Centre - Vicki Thomas

  47. Use Lines Canning College Computing Centre - Vicki Thomas

  48. Use Lines Canning College Computing Centre - Vicki Thomas

  49. Leading the Eye Canning College Computing Centre - Vicki Thomas

  50. Thirds and using Diagonals Canning College Computing Centre - Vicki Thomas

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