Image Subtraction
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FH/FZ5 Processing Item Function Reference Manual
Model (Image Subtraction)
Register the region you want to compare, as a model.
Normally the background image (image not showing what you wan
t to extract at the time of measurement) is
registered as a model.
1 In the Item Tab area, click [Model].
2 In the "Model parameter" area, set model
parameters.
3 Click [Edit].
4 Use the Drawing tools to set the model registration range.
5 Click [OK] in the Figure setting area.
• [OK]: Changes the settings and returns to the previous menu.
• [Cancel]: Changes are discarded. R
eturns to the previous menu.
• [Apply]: Updates the settings without leaving edit window.
Setting item
Setting value
[Factory default]
Description
Boundary extraction
[Checked]
Under this method, the difference image is used directly.
If the registered model and coated objec
t can be captured at the exact
same position, there is no offsetting of images and therefore noises will
not generate due to difference extraction.
In this case, more accurate measuremen
t is possible when the difference
image is used directly.
Unchecked
Under this method, pixels corresponding to specifie
d values are deleted
from the outline of the extracted difference image.
This option is set to remove noises resultin
g from o
ffset images when the
inspection object or camera has moved slightly.
Since information of several pixels are
del
eted from the difference image,
the measured coating width becomes smaller than the actual width.
Boundary level
0 to 9
[3]
Set the degree of assimilation of
variations around boundaries.
Depending on the "Boundary inspection" value, the meaning is different.
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