Starting with my original image (below), I then applied a curve to simulate what is initially captured in the camera (below)
|Original image from camera|
|Gamma curve applied to simulate what is really 'raw' in the camera|
The resultant image is below (note histogram in top corner, squeezed to the low end). The image looks very dark, highly constrasty and with some colour issues (e.g. blue leaves). In the dark areas there appears to be almost no detail at all.
|Gamma curve applied to image|
|Curves applied to simulate what camera does automatically|
This exercise shows the importance of correct exposure in-camera. Avoiding underexposure is especially important because any noise in the dark areas will be exacerbated by the automatic in-camera processing. It also shows me what can be brought back from an image which may be useful for some images that are accidentally poorly exposed.