Image editing

Last changed: 14 November 2018
Picture of image editing in Adobe Photoshop

Almost all pictures can be greatly improved by adjustment of contrast, cropping and sharpening. You can also gain in the quality of your pictures if you learn how to master concepts like Color Space, Color Profile, Resolution etc.

Soon we will add instructions on

  • How to crop your pictures, and some theories about the perfect composition.
  • How to adjust the contrast
  • How to remove color cast
  • How to sharpen your pictures

Do you have any requests for this section? Let us know!

Not sure how to edit your pictures?

Printers, advertising agencies and newspapers can usually help and advise you on how to adapt your pictures for their products.

Do you need help to interpret technical image specifications? Contact the Picture editor!


Pictures on the web

SLU:s new website (2016) is a bit more demanding when it comes to the quality of the pictures than the previous website.

Pictures used on webpages, for example

  • should be in sRGB. If the picture doesn't show properly on the website it's probably because it's in CMYK, a color space for print only.

  • Make sure that the picture holds the right size (number of pixels). If the picture is too small from the beginning, it's no use making it bigger. It will look blurry! Instead, find the original picture (high resolution) and downsize it, or find another picture.

Pictures for printed material

Which settings to use for print depends in the printing technique:

  • Digital print
    Color space: Adobe RGB
    Resolution: At least 300 dpi in the actual size the picture will be printed in.
  • Offset print
    Color space: CMYK
    Resolution: Adapted to the number of lines per inch, LPI(In commercial offset printing, images have to converted electronically or by traditional litho film and halftone screens to a pattern of dots, with a resolution measured as so many lines per inchNewsprint may use 85-110 lpi; web offset 133 lpi (printed from rolls of paper, like consumer magazines); standard sheetfed offset 150 lpi (printed from "lifts" of trimmed sheets of paper); fine quality (art book, etc.) 175-200 lpi. .