SOS 3D - Digital Imaging

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Scanning from a Macintosh in the Computer Center

Photoshop interface and navigating an image

  1. Opening a file File > Open and navigate to your file. Never open a file over the network (if your file is on Orca, first copy it to your local hard drive).
  2. Intro to basics Photoshop interface elements
  3. navigating an image
    • Zoom: Cmd +/-
    • Hand tool: Space Bar (used to move around an image)

Image size and resolution

  1. What is a pixel? Zoom all the way in on your image.
  2. What are the dimensions of your image?
    • Go to Image > image Size to see the overall size in pixels of your image
    • Resizing photos for various usages including: Web, email attachment, and print
  3. What is the resolution of your image? Why does it matter?
  4. Cropping - using the crop tool to remove portions of the image outside of the crop selection
    • You can set the image size to crop to in the properties bar i.e. 400 px (remember the px)

Image adjustments

located under Image > Adjustments

Saving your work

File > Save as. Choose Photoshop as the file format. This will create a uncompressed Photoshop native image file format. It's a good idea to keep an uncompressed copy of your images.

Working with Layers

  • What are layers in Photoshop?
  • Create new layers
  • Hiding and linking layers
  • Copying between layers
  • Duplicating layers
  • Adjustment layers
  • Clipping layers
  • Layer masks

Working with selections

  • intro to selection tools: marquee, lasso, magic wand etc.
  • adjusting selections
  • copying selections to another layer

Saving for web

  1. Saving for web: File > Save for Web & Devices
    • Choose the highest quality with the best (smallest) file size.