Image processing is any form of information processing for which the input is an image, such as photographs or frames of video; the output is not necessarily an image, but can be for instance a set of features of the image. Most image-processing techniques involve treating the image as a two-dimensional signal and applying standard signal-processing techniques to it.

  For the most part Image Processing is used in forensic applications to improve the visual appearance of a digitally captured image.

  An example of image processing would be to remove distracting background patterns or colors to show more detail of the targeted subject content.

  Another use for image processing is to analyze the content for comparisons or to perform photogrammetry to determine distances.