Genius VividPro II, User Manual

Page: 51 / 91

Chapter IV. The TWAIN Interface
44
Note: Checking the Auto Density box in the
Preferences window will automatically
adjust the histogram to give high quality
images without your having to manually
adjust the settings in the Histogram
window.
Tone Map
Like the Histogram, the tone map lets you adjust
the tonal range of an image. However, instead of
making the adjustments using just three variables
(shadows, midtones and highlights, in the histogram),
you can adjust any point along the tonal scale, and up
to 20 points in all.
The x-axis of the graph represents the original
brightness values of the pixels (input levels); the y-
axis represents the new brightness values (output
levels). The diagonal line that appears by default
shows the current relationship between the input and
output values; no color tones have been changed, so
all pixels have the identical input and output values.
The curve moves from shadows on the left (black
with a value of 0) to highlights on the right (white with
a value of 255). All color tones appear somewhere in
between.
When you move the cursor onto the map you will
notice the IN and OUT values showing specific
numbers. The in value represents the original value of
the color tone. The out value represents the new value
of the color tone if you were to click on the graph and
thus redefine it.
Attention