Bit of a mouthful, in other words things you can do to an image to change it into something else, or enhance it. The question is often asked whether an image should be changed at all, well I think that it depends on what you are trying to achieve. If it’s a record shot then change nothing, what you record is exactly what you want to remember. However lots of us photographers are not after record shots, something for the history books or the family album what we are trying to achieve is a final impression, a mood, a feeling, creating something that you enjoy looking at and others will enjoy also. I’ve seen some wonderful landscapes taken by the pro’s who have staked a location and waited for the right season and time of day to take the shot in, I wish at times that I had the capability to do that. For most of us though when photographing landscapes nature is not always kind enough to present the ideal environment, just the right lighting or just the right colours and often this could be the only visit, you are locked into that day and time of day, so take the shot anyway and back on the computer give it a little help.
Take the original tree, remove the dull sky, boost the colour and lighting on the tree itself, embed the new sunset sky as a background and boost its colours to suit.
Happy, then merge the sandwich and save as a new image “Winter Sunset’.
The result is a more pleasing image after manipulation, of course if you prefer the original record shot then you still have the dull flat tree shot…..