Download as PDF, PPTX
Uploaded byMarcio Sargento
Lesson 1 • Introduction to Photoshop
This document provides an overview of key photography concepts including pixels, megapixels, resolution, color modes, histograms, and preparing images for print in Photoshop. It defines pixels and megapixels, explains how to calculate megapixels from image dimensions. It also outlines the differences between screen and print resolution, RGB and CMYK color modes, and how histograms can be used to analyze image exposure. The goal is for the learner to understand these essential digital photography and editing fundamentals.
More Related Content
Similar to Lesson 1 • Introduction to Photoshop
Lesson 1 • Introduction to Photoshop
- 1. Digital Darkroom Visual Arts:Photography • Sargento • AWQ3M/4M
- 2. Learning Goals Today Iwill learn… š Pixels & Megapixels š Resolution š Colour modes š Adobe Photoshop: š Workspace š Basic tools š Histogram š Adjustments & Adjustment Layers
- 3. Recap š Q: Whatis a pixel? š A: The smallest editable component of an image/display. A pixel can only display one colour.
- 4. Recap š Q: Whatis a megapixel? š A: A megapixel is a measurement of pixels by the millions š 1 megapixel = 1 million pixels
- 5. Recap š You cancalculate 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. Resolution š Image resolutionis 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.
- 8. Resolution Web/Screen Resolution = 72DPI/PPI Print Resolution = 300 DPI/PPI
- 9. Colour Modes š Whencreating graphics, editing photographs, etc. for different purposes, along with resolution, you need to consider which colour mode you will be working in.
- 10.
- 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.
- 13. Histogram š Histogram displaysinformation regarding your photograph; š Shadows (blacks) š Midtones (greys) š Highlights (whites)
- 14.
- 15. Histogram š Histogram willallow to analyze your photograph’s information to ensure you have a properly exposed image
- 16. Underexposed Correct ExposureOverexposed
- 17. Histogram Underexposed Most of theinformation is towards the shadows (blacks)
- 18. Histogram Overexposed Most of thehighlight (white) information is on the right of the histogram.
- 19. Histogram Correctly exposed Distribution ofshadows, midtones, and highlights. Nothing is “climbing” on either side.
- 20. Setting Up forPrint š Let’s setup your photographs for printing…