Chapter 5: Degree Of Match Inspection; Outline - Sharp IV-S30J User Manual

Chapter 5: Degree of Match Inspection

5-1 Outline

The gray search function is capable of finding the differences between the non-
defective reference image and the image to be inspected evaluating the degree
Purpose
of match. (The acceptability of the workpiece is evaluated based on its level of
similarity to the reference model.)
Checking for misalignment of labels, checking for entry of wrong parts, checking
that electronic components have been precisely mounted on PC boards,
Applications
checking for misprints, checking for missing metallic parts, such as terminals,
and simple inspection of lettering
[Checking for label misalignment on package]
Examples
Reference image
for checking
çAcceptable application of label
- Checking sequence
1 A gray search for the reference image for positioning is made.
2 After the position of the reference image for checking is corrected based on
3 If the degree of match of the reference image for checking is low, the label is
Search area
Reference
for positioning
image for
positioning
SERIAL NO.
8F053G26
MODEL
IV - S30J
[Measurement results]
- Degree of match compared with the reference image
- Detected coordinates (X/Y) of the measurement image.
- Light level in the measured image (average light
level/absolute value of difference)
the coordinates of the reference image for positioning found in step 1, the
degree of match is determined.
regarded as applied incorrectly.
Reference
image for
positioning
Reference image
for checking
çUnacceptable application of label
5-1
Degree of Match Inspection
Search area
for positioning
5