Differentiate; Normalise; Normalise S.d - JEOL JSPM-5200 Instructions Manual

６ ANALYSIS OPERATION
Filtering operation is applied in the same manner as the Convolve 3 × 3 function.
Clicking on the OK button executes the designated edge-enhancement function.
6.6.3

Differentiate

The current image is differentiated at a certain angle.
The following filtering operation is applied in the same manner as the Convolve 3 × 3
function.
Here is the angle at which the differentiation is to be carried out. Enter an angle in degree,
(as an integer between –90 ° and +90 ° using the keyboard. Clicking on the OK button
executes the differentiation function.
6.6.4

Normalise

The contrast range for the current image is broadened.
The Normalise function changes the image contrast so that the darkest part of the image
becomes 0, and the brightest part of the image becomes 255. In other words, the
brightness range of an acquired image is expanded to the full brightness range of the
display (0 to 255). This function does not influence measurement data.
0
Black
6.6.5

Normalise S.D.

One of the contrast-enhancement methods carried out by expanding the brightness range.
1.
Click on Process in the main menu; then select Normalise S.D. in the
pull-down menu.
A histogram of brightness will be displayed on the displayed window, and the Enter
s.d.'s range to keep data window will be displayed.
2.
Specify the range of deviation.
The Normalise S.D. function is executed.
6-30
Laplace
0 sinθ
0 − sinθ − cosθ
0 0
Brightness
255
White
Histogram of the
original image
− 1 − 1 − 1
− 1 8 − 1
− 1 − 1 − 1
0
cosθ
0
0
Brightness
Black
Histogram of the
processed image
255
White
TMPM5200-2