Median - JEOL JSPM-5200 Instructions Manual

When a deviation value is specified, the brightness range within the specified deviation
value is expanded to the full brightness range of the display (0 to 255). The brightness
range outside of the specified deviation value is displayed in black (0) or white (255).
This function does not influence measurement data.
0
Black
6.6.6

Median

Electric spot noise (spike noise) on an image is eliminated.
In this function, the data of the center pixel and the surrounding 4 or 8 pixels are selected,
and the value of the center pixel is replaced with the middle value of the selected 5 or 9
pixels. This function is called Median filter.
The Median filter can eliminate spike-shaped electric noise in an image.
Click on Process in the main menu; then select Median 5 or Median 9 in the
pull-down menu.
The function is immediately executed.
TMPM5200-2
Average
Normalize
S.D
255
White
(Brightness)
Specified
deviation

Median5

●
● ○ ●
●
Original image
Average
0
255
Black
White
(Brightness)
Median9
●●●
●○●
●●●
Processed image
６ ANALYSIS OPERATION
0
255
Black
White
(Brightness)
6-31