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Lesson 1 • Introduction to Photoshop

Lesson 1 • Introduction to Photoshop

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Lesson 1 • Introduction to Photoshop

  1. 1. Digital Darkroom Visual Arts: Photography • Sargento • AWQ3M/4M
  2. 2. Learning Goals Today I will learn… š  Pixels & Megapixels š  Resolution š  Colour modes š  Adobe Photoshop: š  Workspace š  Basic tools š  Histogram š  Adjustments & Adjustment Layers
  3. 3. Recap š  Q: What is a pixel? š  A: The smallest editable component of an image/display. A pixel can only display one colour.
  4. 4. Recap š  Q: What is a megapixel? š  A: A megapixel is a measurement of pixels by the millions š  1 megapixel = 1 million pixels
  5. 5. Recap š  You can calculate a megapixel by multiplying the image’s width and height in pixels; š  For example; š  4752 px wide X 3168 px high = 15,054,336 pixels or 15 megapixels
  6. 6. Resolution š  Image resolution is the detail an image holds š  Higher resolution means more image detail. š  Image resolution can be measured in various ways; š  DPI = dots per inch (measurement when referencing print files) š  PPI = pixels per inch (measurement when referencing digital files) š  Width x Height in pixels (1920 px x 1080 px = HD resolution)
  7. 7. Resolution
  8. 8. Resolution Web/Screen Resolution = 72 DPI/PPI Print Resolution = 300 DPI/PPI
  9. 9. Colour Modes š  When creating graphics, editing photographs, etc. for different purposes, along with resolution, you need to consider which colour mode you will be working in.
  10. 10. Colour Modes RGB CMYK
  11. 11. Colour Modes RGB CMYK š  Red, Green, Blue š  Created with light š  Use for web/screen š  Start with black and add amounts of light (RGB) š  Cyan, Magenta, Yellow, Key (Black) š  Created with ink š  Use for print š  Start with white and add amounts of ink (CMYK)
  12. 12. Adobe Photoshop
  13. 13. Histogram š  Histogram displays information regarding your photograph; š  Shadows (blacks) š  Midtones (greys) š  Highlights (whites)
  14. 14. Histogram Amount of Pixels
  15. 15. Histogram š  Histogram will allow to analyze your photograph’s information to ensure you have a properly exposed image
  16. 16. Underexposed Correct Exposure Overexposed
  17. 17. Histogram Underexposed Most of the information is towards the shadows (blacks)
  18. 18. Histogram Overexposed Most of the highlight (white) information is on the right of the histogram.
  19. 19. Histogram Correctly exposed Distribution of shadows, midtones, and highlights. Nothing is “climbing” on either side.
  20. 20. Setting Up for Print š  Let’s setup your photographs for printing…

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