wiki:ScreenShots

Version 3 (modified by joshuadf, 7 years ago) (diff)

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So you are submitting screenshots to an academic journal and the article submission guidelines say two things:

  • "Can I provide screen dumps as electronic artwork? This is not recommended but in some cases it is unavoidable - an example is when you would like to illustrate a screen/settings from a software application."
  • "TIFF: color or grayscale photographs (halftones): always use a minimum of 300 dpi."

Computer screens run at 72dpi or 96dpi, so how do you generate a 300 dpi screenshot? Switching the "dots" that a printer understands to "pixels" on your monitor. For example, say you want an image that will print 300 "dots per inch", 7" wide (roughly the printable area of a full single-column 8.5" wide page).

  • 300 * 7 = 2100

Now you may not have a 2100 pixel wide screen resolution, or your application might look wrong at 2100 pixels wide. So the next step is to scale up. In the free Irfanview application (Windows only), you can accomplish via these steps:

  1. Take a screenshot (Options->Capture Screenshot)
  2. Crop to a multiple of 2100 (such as 1050 pixels) with Edit->Crop (Ctrl-Y)
  3. Double the size with Image->Resize/Resample? (Ctrl-R)
  4. Edit the final DPI with Image->Information (I)

Many other tools can do these tasks, including convert from the open source ImageMagick suite, Photoshop, XnView?, or Snagit.

You may also want to turn off ClearType, background images, desktop gradient effects and drop shadows you can so the image compresses better and looks clearer.

More at http://www.rideau-info.com/photos/changedpi.html