Correcting Tone and Exposure - Beginning Photo Retouching and Restoration Using GIMP - page 41

Low contrast (dull tone) : More of the image data is in the mid-range, with none
in the darkest or lightest ranges (Figure 3-4 ).
Figure 3-4. Most of the data is in the middle range
Balanced Tonality : The image data is spread across the full length of the
histogram (Figure 3-5 ).