Picture guidelines – Manipulation and image quality

Adjustment or manipulation?

It’s a fine line between adjustment and manipulation, and Visitnorway must always be on the safe side. The reader must be able to trust that images on Visitnorway are accurate and truthful. If the reader does not trust what’s on the site, the site has lost its usefulness to both us and the readers.

Things you may do:

  • Refresh and enhance colours.
  • Remove elements that the photographer could have removed at the time of shooting.
  • Remove elements that come into conflict with the VN-logo.
  • Remove small elements that could have been avoided, for instance by using a different framing or angle of view.

Things you may NOT do:

  • Make colours look unnatural (for instance tonemapping, too vivid, grey, etc)
  • Change the reality of the image, or alter how the image presents the truth.
  • Mix or blend two or more images.
  • Insert parts of one image into another.
  • Remove elements that have a natural presence in the image.
  • Mirror an image, or flip it along any axis.
  • Use black-and-white images (unless it is natural to do so due to the context, ie for instance historical pictures, or an article about an exhibition of such pictures).

Image quality

File formats:

JPG:
JPG (also known as jpeg) is an image format that is relatively easy to load and gives a good image quality for photographs and the like. It is less well suited for graphics, icons and such, and is lossy; ie. image quality gets permanently decreased ecvery time the image is saved.

PNG:
PNG is lossless and does not lose image quality when reloaded and resaved, but it is both heavier to load and far heavier to save than JPG, and will cause delays in page loading. In terms of image quality, however, it is well suited for both graphics and photography.

We strongly recommend that you work with PNG or TIFF and save as JPG only when completely done with the image. That way you will preserve optimum image quality.

JPG-compression
The higher the compression rate, the more image quality a JPG image wil lose every time it is saved. However, a high compression ratio will also make the image file smaller and thus easier and less time-consuming to load. An overly compressed JPG-image will not look good, and will have irretrievably have lost too much image quality.

As a compromise and rule of thumb, we recommend compressing a 1920 x 936 image to about 600 KB.