Panasonic PV500 User Manual page 86

Correction Setting
Divides 256 gray levels into 8
groups. Nine-point gray levels are
specified. It is possible to change a
specific level.
Area Averaging
In Area Averaging, the pixel with the gray level of "Center Gray Level"
+/- "Noise Range" is converted to "Center Gray Level".
When "Center Gray Level" is 128 and "Noise Range" is 64, the gray
level of the pixel the gray level of which is 64 to 192 is "128".
When "Center Gray Level" is 50 and "Noise Range" is 70, the gray level
for the pixel the gray level of which is 0 to 120 is converted to 50.
In the case of the above setting, the gray level to be converted is -20 to
120. However, as the gray level is only available in the range of 0 to
255, it is processed as above.
Correction Setting
Gray levels in a range of 0 to 255 are divided into 8 blocks, and the gray levels can be changed at 9 points.
1. Select "LUT Setting".
The values are displayed only for the two points (i.e. 0 and
255) among nine points. Tilting the ENTER key up/down
increases or decreases the values at the points where the
values are displayed.
The luminance graph indicates the point that the value
has been input in green and the point that is being
changed in red.
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Tilting the ENTER key left/right/up/down moves
the cursor.