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In this chapter
- Introduction to Histograms
- Correcting Brightness and Contrast
- Setting and Using Black Points and White
Points
The Importance of
Brightness/Contrast
When you print a photograph in a darkroom, you make decisions about
changing brightness and contrast after looking at test prints.
For example, you’d evaluate brightness by making several exposures on
a test strip, then develop and examine the results. You’d change con-
trast by using a different grade of printing paper or by changing a poly-
contrast filter after examining the developed test print.
With digital imaging, you make changes using various commands as
you look at the image on a computer’s monitor screen. Your changes
are immediately visible. You of course don’t need to make a print until
you are satisfied with the onscreen image.