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Choosing the resolution you need

From: Photoshop CS6 Essential Training

Video: Choosing the resolution you need

When you're working in Photoshop, it's always a good idea to know where your image is going to be displayed, because if you know where your image is going, then you'll know how large of a file you will need to work on. In this video, we'll be looking at the three most common ways of presenting or sharing your images. The three categories are halftone, continuous tone, and screen. We'll look at halftone first. When we talk about halftone, we are talking about printing on the printing press. Halftone is not continuous tone, but it might start as a continuous-tone image such as a photograph, but along the way it's converted into a halftone pattern for the printing press.

Choosing the resolution you need

When you're working in Photoshop, it's always a good idea to know where your image is going to be displayed, because if you know where your image is going, then you'll know how large of a file you will need to work on. In this video, we'll be looking at the three most common ways of presenting or sharing your images. The three categories are halftone, continuous tone, and screen. We'll look at halftone first. When we talk about halftone, we are talking about printing on the printing press. Halftone is not continuous tone, but it might start as a continuous-tone image such as a photograph, but along the way it's converted into a halftone pattern for the printing press.

This halftone pattern is made up of a pattern of dots, some large and some small, and you have a series of dots for each of the CMYK inks so the cyan, magenta, yellow, and black inks. When these dot patterns are printed, when they're overlaid one on top of each other, they actually create the illusion of continuous tone, but it's not in fact a continuous-tone image. If you look at anything that's been printed, like a newspaper or a magazine, especially if you look at it under a loupe or a magnifying glass, you will see the individual dots.

So, what resolution do you need in order to convert your image from a continuous- tone image in Photoshop in order to go to the printing press? Well, that depends on the line screen of the printer. As a general rule of thumb, you need two times the line screen, or the LPI. And the LPI, or the line screen, is going to be dependent on the paper that you're going to print to. So for example, when you print a newspaper, you can't print with a very high line screen; typically, they use 85 LPI.

Whereas if you're printing to a really high-end magazine or book, they might go as high as 300 line screen. So as soon as you know the paper that you're printing to, then you can work with your printer and come up with the line screen that you'll need. Then you simply double that, and that would be the resolution you would want in Photoshop. The second category is continuous tone, and probably the most common example of that would be an inkjet printer. An inkjet printer usually needs a resolution in Photoshop between 240 and 360 pixels per inch, and this is sort of an aesthetic choice.

What I would recommend is that you print the same image to the same printer at 240 pixels per inch, and in 300, and again at 360 pixels per inch. I think you'll find that most people can tell the difference between 240 and 300 pixels per inch. The 300-pixels-per-inch image will look as if it's a higher quality. But it kind of drops off after 300 pixels per inch. So you'll have to see if you can see the difference between the 300- and the 360- pixel-per-inch printout.

Another continuous-tone output would be photographic paper. Maybe you're a photographer and you want to send some images to the lab. The lab then should recommend a resolution that they want their images, because they've optimized their printing process, and they'll know exactly the quality or the resolution of the image that you'll need to send them to achieve the results that will look good on that photographic paper. Again, it's typically around 300 pixels per inch.

Now, backing up for just one moment to the inkjet printers, we do call them continuous tone, but they are in fact a series of dots. But it is not the same dot pattern that we discussed previously in the halftone pattern that you would use to the printing press. All right, finally let's talk about if you're going to display or share your images on a screen, like a monitor or a tablet or maybe a projector. In this case, the actual resolution of the file doesn't matter. You could have a resolution at 72 pixels per inch, or 96, or 300. That doesn't matter; what matters is the total pixel count.

Because each one of these devices can display a set number of pixels, and you want to make sure that your image is large enough, or is at the correct size to display properly on that device. Now, in the next video, we'll actually see examples of how to resize or resample your image to change the resolution so that you can prepare it for either a halftone or a continuous-tone printer. Or we'll actually change not the resolution, but the actual pixel count in order to prepare our images for an onscreen display.

Show transcript

This video is part of

Image for Photoshop CS6 Essential Training
Photoshop CS6 Essential Training

148 video lessons · 91449 viewers

Julieanne Kost
Author

 
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  1. 1m 42s
    1. What is Photoshop?
      1m 42s
  2. 1m 11s
    1. Welcome
      1m 11s
  3. 32m 15s
    1. What is Adobe Bridge?
      2m 49s
    2. Getting photos from a camera
      4m 27s
    3. A tour of workspaces in Bridge
      5m 32s
    4. Customizing how thumbnails are displayed
      3m 44s
    5. Changing file names and batch renaming
      2m 58s
    6. Adding basic metadata with metadata templates
      5m 10s
    7. Creating and applying keywords to images
      4m 58s
    8. Viewing images in Full Screen Preview mode
      2m 37s
  4. 27m 1s
    1. Using Review mode to filter out rejected images
      4m 18s
    2. Saving images in collections
      4m 23s
    3. Rating and labeling images
      3m 46s
    4. Using the Filter panel to view different subsets
      4m 16s
    5. Using smart collections
      4m 18s
    6. Viewing final selects in a slideshow
      2m 21s
    7. Organizing groups of images into stacks
      3m 39s
  5. 32m 8s
    1. Comparing RAW and JPEG files
      6m 10s
    2. Starting in Camera Raw instead of Photoshop
      3m 12s
    3. Touring the Camera Raw interface
      9m 13s
    4. Previewing before and after adjustments
      3m 58s
    5. Toggling onscreen shadow and highlight clipping warnings
      3m 11s
    6. Choosing output settings
      3m 36s
    7. Saving a copy without going to Photoshop
      2m 48s
  6. 38m 37s
    1. Using the nondestructive Crop tool
      4m 42s
    2. Correcting a horizon line with the Straighten tool
      2m 41s
    3. Fixing color casts with the White Balance tool
      3m 50s
    4. Fixing blown-out highlights
      2m 56s
    5. Revealing hidden shadow details
      3m 7s
    6. Correcting lens distortion
      3m 25s
    7. Making perspective corrections to images
      2m 40s
    8. Removing color fringing and chromatic aberrations
      2m 28s
    9. Sharpening the details
      7m 45s
    10. Making an average photo great
      5m 3s
  7. 51m 2s
    1. Using the Graduated Filter tool
      6m 57s
    2. Making local adjustments with the Adjustments Brush
      10m 19s
    3. Retouching blemishes with the Spot Removal tool
      3m 41s
    4. Exploring a quick portrait retouching technique using Clarity
      4m 31s
    5. Converting to black and white
      2m 36s
    6. Editing images directly with the Targeted Adjustment tool
      3m 21s
    7. Creating selective color effects with the Adjustment Brush
      6m 5s
    8. Using sepia and split-tone effects
      3m 33s
    9. Adding digital film grain texture effects
      2m 20s
    10. Adding vignettes and border effects
      3m 59s
    11. Saving variations within a single file with the Snapshot command
      3m 40s
  8. 15m 13s
    1. Copying and pasting settings across files
      2m 4s
    2. Processing multiple files in Camera Raw
      3m 22s
    3. Saving and using the library of Camera Raw presets
      6m 48s
    4. Using Image Processor to batch process files
      2m 59s
  9. 30m 24s
    1. Opening files from Bridge
      2m 7s
    2. Opening files from Mini Bridge
      2m 51s
    3. Customizing the Mini Bridge panel
      3m 59s
    4. Using the Application frame
      3m 34s
    5. Managing panels
      5m 14s
    6. Switching and saving workspaces
      4m 39s
    7. Switching tools using the keyboard
      2m 47s
    8. Customizing the keyboard shortcuts
      5m 13s
  10. 10m 25s
    1. Working with tabbed documents
      1m 34s
    2. Arranging documents
      1m 52s
    3. Stopping Photoshop from tabbing documents
      1m 32s
    4. Panning and zooming
      3m 14s
    5. Cycling through different screen modes
      2m 13s
  11. 15m 44s
    1. Understanding file formats
      4m 36s
    2. Choosing the resolution you need
      4m 39s
    3. Understanding Resize vs. Resample
      4m 11s
    4. Working with print sizes and resolution
      2m 18s
  12. 32m 53s
    1. Using Undo and the History panel
      3m 7s
    2. Using crop options
      3m 54s
    3. Understanding Hide vs. Delete for the Crop tool
      1m 46s
    4. Bringing back hidden pixels with Reveal All
      40s
    5. Making the canvas bigger with the Crop tool
      3m 31s
    6. Making the canvas bigger using the Relative option in the Canvas Size command
      2m 18s
    7. Using the Perspective Crop tool
      1m 27s
    8. Straightening a crooked image
      2m 29s
    9. Scaling, skewing, and rotating with Free Transform
      5m 46s
    10. Making nondestructive transformations with Smart Objects
      2m 34s
    11. Warping images
      2m 48s
    12. Preserving important elements with Content-Aware Scale
      2m 33s
  13. 30m 41s
    1. Exploring layer basics
      11m 16s
    2. Loading, selecting, and transforming layers
      8m 4s
    3. Organizing layers using layer groups
      5m 3s
    4. Merging, rasterizing, and flattening layers
      6m 18s
  14. 43m 11s
    1. Using the Marquee and Lasso tools
      5m 43s
    2. Combining selections
      4m 4s
    3. Converting a selection into a layer mask
      5m 29s
    4. Using the Quick Selection tool
      4m 35s
    5. Selecting soft-edged objects using Refine Edge
      9m 42s
    6. Touching up a layer mask with the Brush tool
      7m 22s
    7. Changing the opacity, size, and hardness of the painting tools
      3m 17s
    8. Blending images with a gradient layer mask
      2m 59s
  15. 34m 36s
    1. Introducing adjustment layers
      3m 47s
    2. Starting with a preset
      2m 18s
    3. Improving tonal quality with Levels
      5m 31s
    4. Increasing midtone contrast with Curves
      6m 44s
    5. Removing a color cast with Auto Color
      2m 30s
    6. Changing the color temperature with Photo Filter
      2m 29s
    7. Shifting colors with Hue/Saturation
      4m 41s
    8. Making washed-out colors pop with Vibrance
      2m 48s
    9. Converting color to black and white
      1m 47s
    10. Controlling which layers are affected by an adjustment layer
      2m 1s
  16. 19m 33s
    1. Adjusting shadows and highlights
      5m 44s
    2. Replacing color using Selective Color
      3m 49s
    3. Using fill layers to create a hand-painted look
      6m 5s
    4. Using a gradient fill layer to add a color wash
      3m 55s
  17. 52m 9s
    1. Removing blemishes with the Spot Healing Brush and the Patch tool
      12m 42s
    2. De-emphasizing wrinkles with the Healing Brush
      4m 52s
    3. Smoothing skin and pores with the High Pass filter
      6m 19s
    4. Making teeth bright and white with a Hue/Saturation adjustment layer
      3m 21s
    5. Brightening eyes with Curves
      7m 0s
    6. Taming flyaway hair with the Patch tool
      3m 44s
    7. Removing unwanted details with Content-Aware Fill
      5m 49s
    8. Body sculpting with Liquify
      8m 22s
  18. 24m 12s
    1. Creating panoramas with Photomerge and Auto-Blend
      4m 48s
    2. Combining multiple frames in an action sequence
      8m 44s
    3. Swapping heads in a family portrait
      10m 40s
  19. 38m 26s
    1. Overview of filters
      2m 52s
    2. Applying filters nondestructively using Smart Filters
      5m 18s
    3. Creating a soft glow with the Gaussian Blur filter
      3m 35s
    4. Creating an infrared look with Diffuse Glow
      2m 14s
    5. Adding noise with the Add Noise filter
      6m 27s
    6. Sharpening an image with Unsharp Mask
      5m 11s
    7. Giving an image texture with the Texturizer filter
      1m 49s
    8. Using the Field, Iris, and Tilt-Shift Blurs
      6m 1s
    9. Creating a painting with the Oil Paint filter
      1m 34s
    10. Applying a filter to multiple layers
      3m 25s
  20. 22m 16s
    1. Cycling through the blending modes
      6m 42s
    2. Adding a lens flare effect with Screen
      2m 40s
    3. Scanning or photographing paper to add a deckled edge
      3m 1s
    4. Making a cast shadow more realistic with Multiply
      5m 21s
    5. Sharpening an image with High Pass and Overlay
      2m 26s
    6. Adding a realistic off-center vignette
      2m 6s
  21. 20m 9s
    1. Exploring character (point) type
      7m 6s
    2. Adding paragraph (area) type
      3m 38s
    3. Adding type on a path
      4m 44s
    4. Clipping an image inside type
      3m 3s
    5. Warping type
      1m 38s
  22. 15m 57s
    1. Adding a drop shadow effect
      6m 15s
    2. Adding edges, textures, and color overlays using layer styles
      4m 27s
    3. Creating a transparent logo or watermark
      2m 42s
    4. Knowing how and when to scale layer effects
      2m 33s
  23. 15m 45s
    1. Creating contact sheets
      2m 49s
    2. Using the Output workspace in Bridge
      5m 32s
    3. Exporting web photo galleries
      4m 20s
    4. Saving for the web
      3m 4s
  24. 23m 38s
    1. Working with video clips
      9m 29s
    2. Adding special effects to video
      5m 45s
    3. Adding pans and zooms to still images
      8m 24s
  25. 1m 10s
    1. Goodbye
      1m 10s

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