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Common resolution standards

From: Photoshop CC One-on-One: Fundamentals

Video: Common resolution standards

In this movie I'll introduce you to the print resolution standards so you have a sense of where they come from and what purpose they serve. After all everybody bandies about that you should print an image at 300 pixels per inch. And that's true in many cases, but it's not true in all cases. So with this image open, I'll go up to the Image menu and choose the Image Size command. And because I canceled out last time, it's coming up small. So I'll go ahead and increase the size of the dialog box by dragging the lower right corner.

Common resolution standards

In this movie I'll introduce you to the print resolution standards so you have a sense of where they come from and what purpose they serve. After all everybody bandies about that you should print an image at 300 pixels per inch. And that's true in many cases, but it's not true in all cases. So with this image open, I'll go up to the Image menu and choose the Image Size command. And because I canceled out last time, it's coming up small. So I'll go ahead and increase the size of the dialog box by dragging the lower right corner.

Now I want to keep the width and height values the same as they are, so what I want to do is up sample the image which means I need to turn on the resample checkbox. Now notice the Fit To option here. Go ahead and click on it and choose Auto Resolution, and that's going to bring up this little dialogue box that lists what's known as a screen frequency. Screen frequency measures halftone dots so when you commercially reproduce a document, or when you send it to a laser printer, the printer lays down a ton of these little circular halftone dots.

And the number of halftone dots in an inch is known as the screen frequency. Now 133 is a really common standard. If you select Draft as your quality and then click Okay, then what Photoshop is going to do is match the resolution to the screen frequency so we now have a resolution value of 133 pixels per inch. If you go ahead and choose that command again and you set it to Good, then Photoshop is going to set the resolution to 1 1/2 times the screen frequency.

In our case, 200 pixels per inch and we're going to end up with this effect right there. And then finally If you go ahead and choose the command again, and you set the quality to best, then Photoshop's going to set the resolution to twice the screen frequency, which is 266 pixels per inch. The plain fact of the matter is, it's actually 267, because that standard screen frequency is 133 and a third, which is why the real universal standard, just so you know, is 267 pixels per inch.

But it doesn't really matter if you change it to something else. If you took that up to 289 pixels per inch you're not going to notice the difference, it's not going to look any different in print, in other words, then it did at 267. So, you're just adding pixels to the file. Another print standard, by the way, another print standard by the way is this one here. I'll go ahead and choose auto Resolution, and I'll increase the screen frequency to 150 lines per inch. And that way if I have the quality set to best and I click Okay, we get twice 150, which is 300 pixels per inch, which is where the well known print standard comes from.

The other value that's worth knowing is 360 pixels per inch, which is an ideal resolution for high end inkjet printing. About the lowest you want to go is 220 pixels per inch because any lower than that and you really start to see some jagged pixel transitions. So those are the numbers you need to know. In other words, at the very low end, 220 pixels per inch, for high end commercial output, 267 or 300 pixels per inch, depending on your screen frequency.

And you can always find that out from your commercial printer. And then, 360 pixels per inch for high end inkjet output. But all of this matters, by the way, only if you're printing the image, or importing it into Illustrator or InDesign. If the image is ultimately bound for the web you don't need to worry about resolution at all. In the next movie I'll demonstrate the best way to upsample an image.

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This video is part of

Image for Photoshop CC One-on-One: Fundamentals
Photoshop CC One-on-One: Fundamentals

102 video lessons · 20332 viewers

Deke McClelland
Author

 
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  1. 31m 49s
    1. Welcome to One-on-One
      1m 51s
    2. Opening from the Windows desktop
      5m 35s
    3. Opening from the Macintosh Finder
      7m 14s
    4. Opening from Photoshop or Bridge
      3m 52s
    5. Opening an image from Mini Bridge
      2m 39s
    6. Opening through Camera Raw
      5m 11s
    7. Closing one image and closing all
      5m 27s
  2. 49m 25s
    1. Navigating your image
      40s
    2. The dark vs. the light interface
      3m 12s
    3. Navigating tabs and windows
      4m 32s
    4. Panels and workspaces
      6m 20s
    5. Zooming incrementally
      6m 22s
    6. Zooming continuously
      2m 43s
    7. Entering a custom zoom value
      2m 25s
    8. Scrolling and panning images
      2m 31s
    9. Rotating and resetting the view
      2m 11s
    10. Cycling between screen modes
      3m 10s
    11. Using the Navigator panel
      3m 38s
    12. Using Retina and HiDPI displays
      4m 3s
    13. Adjusting a few screen preferences
      7m 38s
  3. 1h 2m
    1. Digital imaging fundamentals
      1m 45s
    2. Image size and resolution
      6m 34s
    3. The Image Size command
      6m 9s
    4. Common resolution standards
      4m 7s
    5. Upsampling vs. real pixels
      7m 59s
    6. Changing the print size
      8m 15s
    7. Downsampling for print
      5m 14s
    8. Downsampling for email
      6m 22s
    9. The interpolation settings
      6m 40s
    10. Downsampling advice
      5m 5s
    11. Upsampling advice
      4m 15s
  4. 53m 20s
    1. The layered composition
      1m 40s
    2. Introducing the Layers panel
      4m 12s
    3. Adding, scaling, and aligning layers
      5m 27s
    4. Dragging and dropping layers
      4m 36s
    5. Stack, reveal, and rename
      3m 1s
    6. Opacity, history, and blend mode
      6m 5s
    7. Duplicating a selected portion of a layer
      5m 32s
    8. Applying a clipping mask
      3m 58s
    9. Blending inside a clipping mask
      4m 10s
    10. Finishing off your artwork
      3m 13s
    11. Creating a new layer and background
      4m 24s
    12. Layering tips and tricks
      7m 2s
  5. 26m 13s
    1. The art of the save
      54s
    2. Four things to know about saving
      5m 59s
    3. Saving layers to PSD
      6m 34s
    4. Saving print images to TIFF
      4m 48s
    5. Saving an interactive image to PNG
      3m 40s
    6. Saving a flat photo to JPEG
      4m 18s
  6. 32m 16s
    1. Honing in on your image
      1m 43s
    2. The new and improved Crop tool
      4m 35s
    3. Editing your last crop
      6m 29s
    4. Cropping to a specific ratio or size
      5m 57s
    5. Straightening a crooked image
      4m 44s
    6. Filling in missing details
      6m 44s
    7. Using the Perspective Crop tool
      2m 4s
  7. 44m 51s
    1. First, there is brightness
      2m 12s
    2. How luminance works
      4m 18s
    3. The three Auto commands
      3m 27s
    4. Automatic brightness and contrast
      6m 5s
    5. The Brightness/Contrast command
      2m 47s
    6. The dynamic adjustment layer
      4m 4s
    7. Editing adjustment layers
      3m 52s
    8. Isolating an adjustment with a layer mask
      3m 31s
    9. Introducing the histogram
      4m 58s
    10. Measuring an adjustment
      3m 34s
    11. Using the Shadows/Highlights command
      6m 3s
  8. 44m 33s
    1. And second, there is color
      1m 31s
    2. Identifying a color cast
      3m 34s
    3. Correcting a color cast automatically
      3m 57s
    4. Changing the color balance
      6m 10s
    5. Compensating with Photo Filter
      3m 11s
    6. Adjusting color intensity with Vibrance
      3m 29s
    7. Correcting color casts in Camera Raw
      5m 46s
    8. The Hue/Saturation command
      5m 26s
    9. Summoning colors where none exist
      4m 8s
    10. Making more color with Vibrance
      4m 27s
    11. Making a quick-and-dirty sepia tone
      2m 54s
  9. 55m 46s
    1. Making selective modifications
      1m 10s
    2. The geometric Marquee tools
      6m 1s
    3. Aligning one image element to another
      4m 59s
    4. The freeform Lasso tools
      3m 59s
    5. The Polygonal Lasso tool and Quick Mask
      5m 19s
    6. Cropping one selection inside another
      6m 15s
    7. Creating rays of light
      4m 44s
    8. Quick Selection and Similar
      4m 11s
    9. Making it better with Refine Edge
      4m 56s
    10. Integrating image elements
      2m 39s
    11. Magic Wand and Grow
      5m 17s
    12. Refine, integrate, and complete
      6m 16s
  10. 53m 49s
    1. Your best face forward
      1m 0s
    2. Content-Aware Fill
      6m 11s
    3. Using the Spot Healing Brush
      5m 36s
    4. The more capable "standard" Healing Brush
      5m 55s
    5. Meet the Clone Source panel
      3m 53s
    6. Caps Lock and Fade
      4m 57s
    7. The Dodge and Burn tools
      5m 1s
    8. Adjusting color with the Brush tool
      6m 35s
    9. Smoothing skin textures
      5m 58s
    10. Brightening teeth
      4m 0s
    11. Intensifying eyes
      4m 43s
  11. 50s
    1. Until next time
      50s

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