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8-3 ADJSUTMENT OF CONTRAST E N H A N C E M E N T
W h e n observing a specimen with low contrast, image contrast can be increased
through the proper use of the GAIN and OFFSET controls.
(1) While watching the monitor screen, turn the GAIN control knob CW until
the intensity appears slightly more than suitable.
(2) Slowly turn the OFFSET control knob CCW until the image i s displayed as
desired.
(3) Repeat adjustments of both (1) and (2) until the desired part of the
image i s displayed most clearly.
Before enhancement
Offset Level
A
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enhancement
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