
112 Chapter 5
Higher Contrast Images Will Be Perceived as
Sharper than Lower Contrast Images
Are resolution and sharpness the same thing? By
looking at the images shown in Figure 5.23, one
can quickly determine which image seems sharper.
Although the image on the left comprises twice
as many pixels, the image on the right, whose
contrast at coarse details is increased with a l-
ter, looks at rst glance to be distinctly sharper.
The resolution limit describes how much
information makes up each image, but not how
a person evaluates this information. Fine details
such as the picket fence in the distance are irrel-
evant to a person’ ...