6.9.6 LUT
Math
An LUT is mathematically operated on with addition, multiplication or other operation.
The following eight operations are provided:
Operation
Description
Inverse
Level axis of LUT is inverted.
Reverse
Data axis of LUT is reversed.
Add
A constant is added to LUT.
Bitwise And
AND operation with a constant for each bit
Bitwise Or
OR operation with a constant for each bit
Bitwise Xor
XOR operation with a constant for each bit
Multiply
LUT is multiplied by constant.
Divide
LUT is divided by constant.
【
Example
】
If 100 is added to a current LUT with the Add operation, the image is displayed
with the new LUT shown below.
If the result of a numerical operation is outside the range of 0 to 255, the data is set
to 0 or 255.
Original LUT
Level
(Displayed
value)
255
(White)
0
(Black) 0
(Black)
255
(White)
Data value
(Original image data)
Le
ve
l
255
(White)
0
(Black) 0
(Black)
255
(White)
Data value
(Original image data)
New LUT
LUT Math
6.9.7 Fix Z scale
Fix Z Scale changes the scale of the image brightness (height of specimen-surface
unevenness).
For instance, in the case of a height profile displayed with the Profile function as shown
below (left), the scale of height (brightness) is 0 to 10 nm for image brightness of 0
(black) to 255 (white). If the scale is changed to 0 to 20 nm, the displayed height
(brightness) profile changes as shown below (right). The contrast of the displayed image
is also changed.
This function is used to compare two images whose height scales differ from each other,
by converting them to the same height scales.
TMPM5200-2
6-75
