What Is Checker - Panasonic MICRO-IMAGECHECKER AX40 User Manual

6.1 What Is Checker?

Checker is a general term of the area and conditions for inspecting with a captured image. The following
checkers are available.
Checker Description
Binary Window Counts the number of white, black, extract/not extract
pixels.
Gray Window Calculates a gray average within the area.
Binary Edge Detects the black/white reversed pixels in a binary image.
Detects the points that distinguish the extracted and not
extracted parts and outputs the coordinates.
Gray Edge Detect the changing points (edges) in the gray scale and
outputs the number of detected changing points, the
coordinates and the changing amount (differential values).
This function is effective if edges have small variation of
image brightness and the contrast is low.
Feature Extraction In a binary image, detects black or white clusters. Detects
extract/not extraction images and the proper number of
clusters for the condition. Outputs the feature amount of
each gravity coordinate or angle of principal axis angle.
Smart Matching Detects an image similar to a registered base image
(template) according to the data (gray value) of the image
brightness. Extracts the difference between the base
image and the detected image (by overlapping the two
images and extracting the parts having the gray
difference). With this function, you can set a Mask area (,
where inspection is not performed) within a template.
Contour Matching Detects an image similar to the registered base image
according to contour information of the object. Supports for
360-degree rotation of the object. Up to 2 of Contour
Matching can be set per product type (including rotation or
contour adjustment).
Position Adjustment:
With the functions of each checker, calculates the moving (adjustment) amount
from the base position. The group checkers are executed at the position where
the object is shifted from the base position by the moving mount. But, only the
position adjustment checkers, to which lower numbers are assigned, can refer to
the adjustment amount.
Binary Edge
Gray Scale Edge
Feature Extraction
Matching
64
Schnabel Memory Page
Refer.
Gray
Color
Differential
Yes Yes 77
No Yes 80
Yes Yes 82
Yes
No 86
Yes Yes 93
No Yes 100
Yes Yes 110
No No 115
Yes Yes
117
No Yes 120
Yes Yes 123
No Yes 126