Making Sense of The Camera Histogram


23 October 2007 12:22

A histogram is simply a bar chart that shows the brightness levels of a picture. It ranges from blacks or shadows on the left, through midtones in the centre, to whites or highlights on the right.

Well-exposed images should have smooth peaks and troughs all the way across the chart. You can correct some images post-shooting in Photoshop, but all you are doing is spreading the data back out across the histogram. It's always best to get a good exposure at the shooting stage rather than at the editing stage.

In digital photography, histograms are can be found in camera, and can be viewed on screen, in RAW software and in Photoshop. Camera histograms can be useful when assessing you images for overexposure and underexposure.