Omron FH-3 Series Reference Manual page 596

The procedures below are used when a single image is used.
2
Set the parameters.
To register a model after setting the parameters, click [Register model].
The message "Please set model." is displayed when a model has not been registered or a model needs to
be registered. (Except initial state.)
Setting item
Boundary
inspection
Boundary level
Normalization
Perturbation
Difference
594
Advanced Filter
Setting value
[Factory default]
Difference image is used as is in this method.
When the image of the registered model and the target object after
application can be taken at the same exact position, there is no position
• [Checked] difference between the images so no noise is generated by image
subtraction.
In this case, measurement can be performed more accurately when a
difference image is used as is.
The preset pixel values are deleted from the outline of the extracted
difference image in this method.
Set this method to remove noise caused by position difference of images
when the inspection target or camera slightly moves.
The application width is measured to be narrower than the actual width
because information of several pixels is deleted from the difference
image.
• Unchecked
0 to 9 Select the degree of assimilation of variations around boundaries.
[3] The function differs depending on the "Boundary inspection" setting.
Select whether or not to perform normalization according to the
brightness at the time of model registration.
When this check box is selected, the density is adjusted before matching,
• Checked so that the matching is not affected by changes in the total image
• [Unchecked] brightness or the lighting fluctuations.
When normalization is performed on an almost plain object, the total
image brightness is changed and the measurement does not work
correctly.
When this check box is selected, a correction is made before matching in
• Checked order to prevent false detection of slight positional deviation of
• [Unchecked] measurement objects as differences.
However, this requires more processing time.
This sets the reference gradation used when calculating differences
between the model and the inspected object image.
0 to 255
Pixels with a difference equal to or greater than Difference are converted
[50]
to white and other pixels are converted to black, so that only defects are
converted to white and measured.
Description
FH/FZ5 Processing Item Function Reference Manual