Image post-processing means manipulating an image in software like Adobe Photoshop to enhance detail and create an overall more appealing or informative image. But post-processing cannot reveal image detail that was not captured by the camera. Ideally, post-processing occurs on the original RAW file before the file is converted to other formats, eg .jpg or Zoomify
There are at least four processes that can be applied to an image after it has been processed into RGB data and white balanced:
Download Introducton to Resolution [.pdf 3.7MB]] for an overview of using unsharp masks.(Courtesy of Dr Les Walkling)
The following image is a simple example of the four steps as separate adjustment layers in a Photoshop file.
Compare this with the original image.
Pictures courtesy of Geoff Thompson, Queensland Museum
Words by Les Walkling