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Understanding pixels

From: Up and Running with Photoshop CS6

Video: Understanding pixels

In order to really master Photoshop, you gotta know what's going on behind the scenes. We're going to talk about an important aspect of that, probably the most important aspect of that, in this movie. So I'm going to go to the Window menu and choose the Navigator panel. Now what we're going to do, is we're going to Zoom in on one of these edges that looks really smooth and round. I'm going to choose the top of the subject's head here. And so I'm going to go in the Navigator panel and Zoom in, and I'll have to rearrange this here. So I'm going to drag this window up, so that I can keep seeing the top of her head. Zooming in and reframing.

Understanding pixels

In order to really master Photoshop, you gotta know what's going on behind the scenes. We're going to talk about an important aspect of that, probably the most important aspect of that, in this movie. So I'm going to go to the Window menu and choose the Navigator panel. Now what we're going to do, is we're going to Zoom in on one of these edges that looks really smooth and round. I'm going to choose the top of the subject's head here. And so I'm going to go in the Navigator panel and Zoom in, and I'll have to rearrange this here. So I'm going to drag this window up, so that I can keep seeing the top of her head. Zooming in and reframing.

So, now that we're here, we're at about 367% Zoomed in, we're starting to see that what once look like a really smooth line is not really. I'm going to keep Zooming in and Zooming in, Zooming in and rearranging this here. And when I Zoom in all the way, 3200%, we can see very clearly that what's happening here, is that this image is actually made up of little tiny squares. Even what seemed round is made up of these little tiny squares.

These little squares, are called pixels, pixel, and pix, pixel is short for picture element. So that is what, are the literal building blocks of the images that we are working with in Photoshop. Now you'll notice that once we've Zoomed in to a certain resolution, we get this little white grid here. If I keep zooming out, It will eventually disappear. But this is called a Pixel Grid. And this is really helpful so that you can see that there's only one color per little square.

And I can go to the View menu and I can choose to go to Show, and I can deselect Pixel Grid if I don't want that to show, if that gets distracting. But typically I like to leave that on, so I'm aware of these little tiny squares. And often times when we have problems with our image, it is because of these little squares. And getting them to do the right thing, often times, is the great challenge of Photoshop. So again, regardless of what you're painting, whether it's a circle or square or a curved line, you're most of the time making these little pixels.

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This video is part of

Image for Up and Running with Photoshop CS6
Up and Running with Photoshop CS6

43 video lessons · 13064 viewers

Chad Perkins
Author

 
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  1. 1m 59s
    1. Welcome
      1m 59s
  2. 3m 7s
    1. Overview
      3m 7s
  3. 19m 26s
    1. Importing images from a camera
      4m 3s
    2. Using Adobe Bridge
      7m 10s
    3. Using Camera Raw
      5m 57s
    4. Opening images in Photoshop
      2m 16s
  4. 45m 18s
    1. Creating new documents
      3m 43s
    2. Interface overview
      5m 43s
    3. Navigating documents
      4m 58s
    4. Working with layers
      9m 33s
    5. Straightening images
      3m 15s
    6. Cropping images
      3m 54s
    7. Performing basic transformations
      5m 45s
    8. Moving and aligning objects
      8m 27s
  5. 8m 36s
    1. Understanding pixels
      2m 19s
    2. Understanding resolution
      4m 32s
    3. Saving your work
      1m 45s
  6. 23m 33s
    1. Understanding color modes
      3m 55s
    2. Using adjustment layers
      3m 35s
    3. Fixing problems automatically
      2m 36s
    4. Reading a histogram
      3m 40s
    5. Adjusting exposure (brightness)
      4m 27s
    6. Adjusting colors selectively
      5m 20s
  7. 31m 4s
    1. Intro to selecting
      4m 47s
    2. Making quick selections
      6m 45s
    3. Refining selections
      8m 26s
    4. Making a collage
      11m 6s
  8. 11m 46s
    1. Removing small problems
      2m 4s
    2. Fixing bigger problems
      6m 39s
    3. Intelligently scaling an object
      3m 3s
  9. 12m 33s
    1. Creating Smart Objects
      5m 13s
    2. Applying effects
      5m 1s
    3. Adjusting applied effects
      2m 19s
  10. 26m 30s
    1. Creating text
      5m 47s
    2. Editing text
      8m 30s
    3. Using layer styles
      5m 54s
    4. Creating graphic design elements
      6m 19s
  11. 31m 14s
    1. Painting
      9m 54s
    2. Customizing brushes
      9m 44s
    3. Creating vector shapes
      11m 36s
  12. 14m 51s
    1. Understanding file formats
      3m 46s
    2. Saving for the web
      7m 6s
    3. Printing from Photoshop
      3m 59s

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