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Analysis
We
use Adobe Photoshop to enhance our slides, negatives, and prints
of Rock Art from various collections. The following is a quick
description of our process to repair the following most common
problems.
- Over/Under
Exposure:
To repair this problem
we use curves, levels,
or contrast to adjust the overall brightness and contrast of
an image. We often isolate sections that are darker than the
rest using the magic wand and we always feather
this kind of selection.
 
-
Poor
Petroglyph/Pictograph Visibility: To repair this problem we have
to make selections of the petroglyph that start from general
to specific. First we paint a general selection using the quick
mask or lasso tool. Then we make a selection within the selection
by picking the dominant hue in the petroglyph. We then highlight
this selection. We sometimes select the inverse and darken it
so that there is more contrast between the petroglyph and the
rock. Although these are powerful tools, we do our best
to keep a natural looking image. During the process we use various
techniques to make the petroglyph more clear. For example, we
may turn the saturation or contrast all the way up so we can
have different perspectives on the petroglyph.
 
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