Bio-Rad EXQuest Spot Cutter - Manual (Page 103)

PDQuest User Guide
3-24
Fig. 3-16. Two views of the Frequency Distribution histogram.
Gamma Slider
Some images may be more effectively visualized if their data are mapped to the
computer screen in a nonlinear fashion. Adjusting the Gamma slider handle expands
or compresses the contrast range at the dark or light end of the range, and this is
reflected in the transform plot and preview window.
Low-High magnifies
area between sliders
Can better distinguish background
noise from real data
Low slider remaps background noise to white High slider remaps weaker signals to black
Range of actual
data in the image
is very limited
Log scaling enables you to
better distinguish peaks