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3.
[contrast], [Min edge len.], and [filter] respectively,and you can confirm that the
information of the non-defective sample to be registered (red line group)
changes. You can create ambiguous parts and good quality samples without
noise.
4.
After setting each item, clicking the [Save] button confirms that the model shape
is registered (or updated).
5.
After completing the registration work, registering the good product sample is
completed by sliding the [End of registration] to the left.
Detection result - judgment
The judgment criteria of OK / NG is set for the detection result. This time, NG judg-
ment is done by calculating the difference area comparing with the good sample
which is registered.
In the above setting, the difference area will be 3 and it will not be 0 even if compar-
ing good samples with each other. This is because a good model is generated with a
filtered image to remove minute noise contained in the image at the time of registra-
tion. If you want to match good image with good model, please disable filter setting at
registration.
In addition, in the [Comparison with good sample], in order to avoid the influence
such as temporal change of the lighting and a slight change of the color due to the
state change of the workpiece, the brightness correction is effective in the initial set-
ting. By turning off the brightness correction, it is possible to detect the overall color
change as well.
For example, those with a difference area of 40 or less are considered good prod-
ucts, those with a difference area of 40 or more are considered defective products. To
make that judgment, with the area of the detection result selected, set the value of
max of [Judgment threshold] to 40. These examples are as follows. In this case, it is
judged as OK if it is a defect like a black point in the lower right corner of R in the
image at the right end, and it is possible to detect a misalignment or missing of a
printing size larger than that. If you want to detect black spots, please set ?Judgment
threshold?value to less than 26.
Switching running mode
After completing all settings from image acquisition to output setting, and after com-
pleting the inspection project creation, switch to [running mode] and execute the proj-
ect. Term list
1.3
Term list
1.
Inspection project A project for executing image acquisition / inspection / output
created by VisionNavi. The inspection project can be saved as a file. One
inspection project consists of the following items, their settings and values are in
the state when the inspection project is saved. ·Up to 8 camera settings ·A
tool list linked to each camera ·All settings of each tool ·Up to 20 saved
images ·Master image and shape model saved by each tool ·Value of DM
·Value of Branch control variable The project file is saved in D: ¥ Stella ¥ proj-
ects and the extension is. 'scfg'.
2.
Tools Individual processing constituting the inspection project. There are [Cap-
ture] and [Flaw inspection].
3.
Tool list A set of tools that can be created for each camera. A tool ID is automat-
ically assigned to each tool in the tool list. It is displayed on the setting screen,
on the left side of the screen.
You can right-click the ID on the tool setting screen and redefine the ID for the
tool ID. At that time, since the tool ID set within each tool is not updated, please
set again.
VisionNavi User Manual
4
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