Panasonic PV-500, User Manual

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4.7.11 Flaw Detection
What Is Flaw Detection?
Flaw Detection detects fine flaws, burs, cracks, and foreign objects (, which are generally called as “flaw” in this
manual). The checker calculates gray average value within the segmented area (cell) on a line, an arc, or a
circumference, or in a rectangle. If the PV500 detects an area more than a certain level of difference in average
gray, the device judges it as a flaw.
It is useful to detect flaws, burs, missing edges or contamination.
On the edge of a rectangular face
On the surface of an image On the edge of a circle
Output Data
Line Plane Ellipse
No. of Objects: 0 - 255 0 - 511 0 - 511
Flaw size: 1 - 256 1 - 256 1 - 3600*
First Cell of Flaw: 0 - 255 0 - 65535 0 - 3599
Coordinate X and Y of first cell of flaw
* When setting "Detect Mode" to "Gray Range", it may be 3601 - 3854 depending on the settings of "Num. of
Cells for Calc. Range" and "Num. of Cells per Shift".
Specifying Checker No.
1.
Select “Flaw Detection” in "Checker Type".
2.
Select the checker No. list and specify a checker
number to set.
3.
Press the ENTER key to determine the checker No.
“Flaw Detection” setting window is displayed. The gray
image is displayed on the screen window.